1 |
A + B Problem |
JavaScript |
Easy |
2 |
Trailing Zeros |
JavaScript |
Easy |
3 |
Digit Counts |
|
Medium |
4 |
Ugly Number II |
JavaScript |
Medium |
5 |
Kth Largest Element |
|
Medium |
6 |
Merge Two Sorted Arrays |
JavaScript |
Easy |
7 |
Serialize and Deserialize Binary Tree |
Python |
Medium |
8 |
Rotate String |
Python |
Easy |
9 |
Fizz Buzz |
JavaScript |
Easy |
10 |
String Permutation II |
|
Medium |
11 |
Search Range in Binary Search Tree |
Python |
Medium |
12 |
Min Stack |
Python |
Medium |
13 |
Implement strStr() |
|
Easy |
14 |
First Position of Target |
JavaScript |
Easy |
15 |
Permutations |
Python |
Medium |
16 |
Permutations II |
Python |
Medium |
17 |
Subsets |
Python |
Medium |
18 |
Subsets II |
Python |
Medium |
20 |
Dices Sum |
Python |
Hard |
21 |
Moving Circle |
|
Medium |
22 |
Flatten List |
Python |
Easy |
24 |
LFU Cache |
Python |
Hard |
26 |
inner product |
|
Hard |
27 |
abc String |
|
Hard |
28 |
Search a 2D Matrix |
JavaScript |
Easy |
29 |
Interleaving String |
|
Medium |
30 |
Insert Interval |
|
Medium |
31 |
Partition Array |
|
Medium |
32 |
Minimum Window Substring |
Python |
Medium |
33 |
N-Queens |
|
Medium |
34 |
N-Queens II |
|
Medium |
35 |
Reverse Linked List |
JavaScript |
Easy |
36 |
Reverse Linked List II |
JavaScript |
Medium |
37 |
Reverse 3-digit Integer |
JavaScript |
Naive |
38 |
Search a 2D Matrix II |
JavaScript |
Medium |
39 |
Recover Rotated Sorted Array |
JavaScript |
Easy |
40 |
Implement Queue by Two Stacks |
Python |
Medium |
41 |
Maximum Subarray |
JavaScript |
Easy |
42 |
Maximum Subarray II |
Python |
Medium |
43 |
Maximum Subarray III |
JavaScript |
Hard |
44 |
Minimum Subarray |
Python |
Easy |
45 |
Maximum Subarray Difference |
JavaScript |
Medium |
46 |
Majority Element |
Python |
Easy |
47 |
Majority Element II |
Python |
Medium |
48 |
Majority Number III |
JavaScript |
Medium |
49 |
Sort Letters by Case |
Python |
Medium |
50 |
Product of Array Exclude Itself |
Python |
Easy |
51 |
Previous Permutation |
|
Medium |
52 |
Next Permutation |
|
Medium |
53 |
Reverse Words in a String |
Python |
Easy |
55 |
Compare Strings |
JavaScript |
Easy |
56 |
Two Sum |
JavaScript |
Easy |
57 |
3Sum |
Python |
Medium |
58 |
4Sum |
JavaScript Python |
Medium |
59 |
3Sum Closest |
JavaScript |
Medium |
60 |
Search Insert Position |
JavaScript |
Easy |
61 |
Search for a Range |
JavaScript |
Medium |
62 |
Search in Rotated Sorted Array |
JavaScript |
Medium |
63 |
Search in Rotated Sorted Array II |
JavaScript |
Medium |
64 |
Merge Sorted Array |
Python |
Easy |
65 |
Median of two Sorted Arrays |
|
Hard |
66 |
Binary Tree Preorder Traversal |
JavaScript |
Easy |
67 |
Binary Tree Inorder Traversal |
JavaScript |
Easy |
68 |
Binary Tree Postorder Traversal |
JavaScript |
Easy |
69 |
Binary Tree Level Order Traversal |
JavaScript |
Easy |
70 |
Binary Tree Level Order Traversal II |
Python |
Medium |
71 |
Binary Tree Zigzag Level Order Traversal |
JavaScript |
Medium |
72 |
Construct Binary Tree from Inorder and Postorder Traversal |
JavaScript |
Medium |
73 |
Construct Binary Tree from Preorder and Inorder Traversal |
JavaScript |
Medium |
74 |
First Bad Version |
Python |
Medium |
75 |
Find Peak Element |
Python |
Medium |
76 |
Longest Increasing Subsequence |
JavaScript |
Medium |
77 |
Longest Common Subsequence |
JavaScript |
Medium |
78 |
Longest Common Prefix |
|
Medium |
79 |
Longest Common Substring |
JavaScript |
Medium |
80 |
Median |
|
Easy |
81 |
Find Median from Data Stream |
|
Hard |
82 |
Single Number |
JavaScript |
Easy |
83 |
Single Number II |
JavaScript |
Medium |
84 |
Single Number III |
Python |
Medium |
85 |
Insert Node in a Binary Search Tree |
Python |
Easy |
86 |
Binary Search Tree Iterator |
Python |
Hard |
87 |
Remove Node in Binary Search Tree |
Python |
Hard |
88 |
Lowest Common Ancestor of a Binary Tree |
Python |
Medium |
89 |
k Sum |
|
Hard |
90 |
k Sum II |
Python |
Medium |
91 |
Minimum Adjustment Cost |
|
Medium |
92 |
Backpack |
JavaScript |
Medium |
93 |
Balanced Binary Tree |
JavaScript |
Easy |
94 |
Binary Tree Maximum Path Sum |
JavaScript |
Medium |
95 |
Validate Binary Search Tree |
JavaScript |
Medium |
96 |
Partition List |
JavaScript |
Easy |
97 |
Maximum Depth of Binary Tree |
JavaScript |
Easy |
98 |
Sort List |
Python |
Medium |
99 |
Reorder List |
Python |
Medium |
100 |
Remove Duplicates from Sorted Array |
Python |
Easy |
101 |
Remove Duplicates from Sorted Array II |
Python |
Easy |
102 |
Linked List Cycle |
Python |
Medium |
103 |
Linked List Cycle II |
Python |
Hard |
104 |
Merge K Sorted Lists |
Python |
Medium |
105 |
Copy List with Random Pointer |
Python |
Medium |
106 |
Convert Sorted List to Binary Search Tree |
Python |
Medium |
107 |
Word Break |
|
Medium |
108 |
Palindrome Partitioning II |
|
Medium |
109 |
Triangle |
JavaScript |
Medium |
110 |
Minimum Path Sum |
JavaScript |
Easy |
111 |
Climbing Stairs |
JavaScript |
Easy |
112 |
Remove Duplicates from Sorted List |
JavaScript |
Easy |
113 |
Remove Duplicates from Sorted List II |
Python |
Medium |
114 |
Unique Paths |
JavaScript |
Easy |
115 |
Unique Paths II |
JavaScript |
Easy |
116 |
Jump Game |
JavaScript |
Medium |
117 |
Jump Game II |
JavaScript |
Medium |
118 |
Distinct Subsequences |
Python |
Medium |
119 |
Edit Distance |
|
Medium |
120 |
Word Ladder |
|
Hard |
121 |
Word Ladder II |
|
Hard |
122 |
Largest Rectangle in Histogram |
|
Hard |
123 |
Word Search |
|
Medium |
124 |
Longest Consecutive Sequence |
|
Medium |
125 |
Backpack II |
JavaScript |
Medium |
126 |
Max Tree |
|
Hard |
127 |
Topological Sorting |
|
Medium |
128 |
Hash Function |
JavaScript |
Easy |
129 |
Rehashing |
|
Medium |
130 |
Heapify |
Python |
Medium |
131 |
The Skyline Problem |
|
Super |
132 |
Word Search II |
|
Hard |
133 |
Longest Word |
Python |
Easy |
134 |
LRU Cache |
Python |
Hard |
135 |
Combination Sum |
Python |
Medium |
136 |
Palindrome Partitioning |
|
Medium |
137 |
Clone Graph |
|
Medium |
138 |
Subarray Sum |
Python |
Easy |
139 |
Subarray Sum Closest |
|
Medium |
140 |
Fast Power |
Python |
Medium |
141 |
Sqrt(x) |
Python |
Easy |
142 |
O(1) Check Power of 2 |
JavaScript |
Easy |
143 |
Sort Colors II |
|
Medium |
144 |
Interleaving Positive and Negative Numbers |
Python |
Medium |
145 |
Lowercase to Uppercase |
JavaScript |
Naive |
146 |
Lowercase to Uppercase II |
|
Naive |
147 |
Narcissistic Number |
|
Easy |
148 |
Sort Colors |
|
Medium |
149 |
Best Time to Buy and Sell Stock |
JavaScript |
Medium |
150 |
Best Time to Buy and Sell Stock II |
JavaScript |
Medium |
151 |
Best Time to Buy and Sell Stock III |
JavaScript |
Medium |
152 |
Combinations |
Python |
Medium |
153 |
Combination Sum II |
Python |
Medium |
154 |
Regular Expression Matching |
|
Hard |
155 |
Minimum Depth of Binary Tree |
JavaScript |
Easy |
156 |
Merge Intervals |
|
Easy |
157 |
Unique Characters |
Python |
Easy |
158 |
Valid Anagram |
JavaScript |
Easy |
159 |
Find Minimum in Rotated Sorted Array |
JavaScript |
Medium |
160 |
Find Minimum in Rotated Sorted Array II |
JavaScript |
Medium |
161 |
Rotate Image |
JavaScript |
Medium |
162 |
Set Matrix Zeroes |
JavaScript |
Medium |
163 |
Unique Binary Search Trees |
JavaScript |
Medium |
164 |
Unique Binary Search Trees II |
Python |
Medium |
165 |
Merge Two Sorted Lists |
JavaScript |
Easy |
166 |
Nth to Last Node in List |
Python |
Easy |
167 |
Add Two Numbers |
JavaScript |
Easy |
168 |
Burst Balloons |
|
Hard |
169 |
Tower of Hanoi |
|
Medium |
170 |
Rotate List |
JavaScript |
Medium |
171 |
Anagrams |
JavaScript |
Medium |
172 |
Remove Element |
Python |
Easy |
173 |
Insertion Sort List |
Python |
Easy |
174 |
Remove Nth Node From End of List |
JavaScript |
Easy |
175 |
Invert Binary Tree |
JavaScript |
Easy |
176 |
Route Between Two Nodes in Graph |
|
Medium |
177 |
Convert Sorted Array to Binary Search Tree With Minimal Height. |
Python |
Easy |
178 |
Graph Valid Tree |
|
Medium |
179 |
Update Bits |
|
Medium |
181 |
Flip Bits |
JavaScript |
Easy |
182 |
Delete Digits |
|
Medium |
183 |
Wood Cut |
|
Hard |
184 |
Largest Number |
|
Medium |
185 |
Matrix Zigzag Traversal |
JavaScript |
Easy |
186 |
Max Points on a Line |
|
Medium |
187 |
Gas Station |
|
Medium |
188 |
Insert five |
|
Easy |
189 |
First Missing Positive |
JavaScript |
Medium |
190 |
Next Permutation II |
|
Medium |
191 |
Maximum Product Subarray |
JavaScript |
Medium |
192 |
Wildcard Matching |
|
Hard |
193 |
Longest Valid Parentheses |
JavaScript |
Easy |
194 |
Find Words |
|
Medium |
196 |
Missing Number |
JavaScript |
Medium |
197 |
Permutation Index |
|
Medium |
198 |
Permutation Index II |
|
Medium |
199 |
Judge Connection |
|
Medium |
200 |
Longest Palindromic Substring |
|
Medium |
201 |
Segment Tree Build |
Python |
Medium |
202 |
Segment Tree Query |
Python |
Medium |
203 |
Segment Tree Modify |
Python |
Medium |
204 |
Singleton |
Python |
Easy |
205 |
Interval Minimum Number |
Python |
Medium |
206 |
Interval Sum |
Python |
Medium |
207 |
Interval Sum II |
Python |
Hard |
208 |
Assignment Operator Overloading (C++ Only) |
|
Medium |
209 |
First Unique Character in a String |
JavaScript |
Easy |
210 |
Null-terminated String |
|
Easy |
211 |
String Permutation |
JavaScript |
Easy |
212 |
Space Replacement |
Python |
Easy |
213 |
String Compression |
JavaScript |
Easy |
214 |
Max of Array |
|
Naive |
215 |
Rate Limiter |
|
Hard |
216 |
Substring Rotation |
|
Easy |
217 |
Remove Duplicates from Unsorted List |
|
Easy |
218 |
Student Level |
|
Easy |
219 |
Insert Node in Sorted Linked List |
|
Easy |
221 |
Add Two Numbers II |
JavaScript |
Medium |
222 |
Setter and Getter |
|
Naive |
223 |
Palindrome Linked List |
JavaScript |
Medium |
224 |
Implement Three Stacks by Single Array |
|
Medium |
225 |
Find Node in Linked List |
|
Naive |
226 |
Set of Stacks II |
|
Hard |
227 |
Mock Hanoi Tower by Stacks |
|
Easy |
228 |
Middle of Linked List |
|
Naive |
229 |
Stack Sorting |
|
Medium |
230 |
Animal Shelter |
|
Hard |
231 |
Typeahead |
|
Hard |
232 |
Tiny Url |
|
Medium |
233 |
Next Smaller and Larger Number with the Same 1 Bits |
|
Medium |
234 |
Web Crawler |
|
Super |
235 |
Prime Factorization |
|
Easy |
236 |
Swap Bits |
|
Easy |
237 |
Missing Integer |
|
Easy |
238 |
Monochrome Screen |
|
Easy |
239 |
Root of Equation |
|
Easy |
240 |
Program Check |
|
Hard |
241 |
String to Integer |
|
Naive |
242 |
Convert Binary Tree to Linked Lists by Depth |
Python |
Easy |
243 |
Amicable Pair |
|
Easy |
244 |
Delete Char |
|
Medium |
245 |
Subtree |
|
Medium |
246 |
Binary Tree Path Sum II |
|
Medium |
247 |
Segment Tree Query II |
Python |
Medium |
248 |
Count of Smaller Number |
JavaScript |
Medium |
249 |
Count of Smaller Number before itself |
JavaScript |
Hard |
250 |
Special Palindrome String |
|
Easy |
251 |
Array compression |
|
Medium |
252 |
arithmetic matrix |
|
Medium |
253 |
Minimum Type Way |
|
Medium |
254 |
Drop Eggs |
|
Easy |
255 |
Multi-string search |
|
Easy |
256 |
The Maximum Order |
|
Hard |
257 |
Longest String Chain |
|
Medium |
258 |
Map Jump |
|
Hard |
259 |
Find the largest Divisor |
|
Medium |
260 |
Same Diagonal Elements |
|
Easy |
261 |
Maximum Connected Area |
|
Medium |
262 |
heir tree |
|
Medium |
264 |
Counting Universal Subarrays |
|
Easy |
265 |
Maximum Non-Negative Subarray |
|
Easy |
266 |
Expect Distance |
|
Medium |
267 |
minimum rest days |
|
Medium |
268 |
Parentheses Score |
|
Medium |
269 |
two colors' tower |
|
Hard |
270 |
Letter Combinations of a Phone Number II |
|
Medium |
271 |
prefix notation to postfix notation |
|
Medium |
272 |
Climbing Stairs II |
|
Easy |
273 |
Test Strategy |
|
Medium |
274 |
Make binary tree average |
|
Super |
275 |
Moving Shed |
|
Medium |
276 |
another zuma |
|
Medium |
277 |
Word Spacing |
|
Easy |
278 |
Paint Fill |
JavaScript |
Easy |
279 |
Number of Ways to Represent N Cents |
|
Medium |
280 |
Closest City |
|
Easy |
281 |
Paint the Ceiling |
|
Medium |
282 |
Decrypt the String |
|
Easy |
283 |
Max of 3 Numbers |
JavaScript |
Naive |
284 |
Matching Subsequences |
|
Medium |
285 |
Tall Building |
|
Medium |
286 |
Inversions |
|
Hard |
287 |
The Competition of View |
|
Medium |
290 |
Sorted Arrangement |
|
Hard |
291 |
Second Diameter |
|
Medium |
292 |
Sort Anagrams Array |
|
Easy |
293 |
The depth of the tunnel |
|
Medium |
294 |
Linked List Simplification |
|
Easy |
296 |
Unique Array |
|
Easy |
360 |
Sliding Window Median |
|
Hard |
362 |
Sliding Window Maximum |
JavaScript |
Hard |
363 |
Trapping Rain Water |
|
Medium |
364 |
Trapping Rain Water II |
|
Hard |
365 |
Count 1 in Binary |
Python |
Easy |
366 |
Fibonacci |
JavaScript |
Naive |
367 |
Expression Tree Build |
|
Hard |
368 |
Expression Evaluation |
|
Hard |
369 |
Convert Expression to Polish Notation |
|
Medium |
370 |
Convert Expression to Reverse Polish Notation |
|
Medium |
371 |
Print Numbers by Recursion |
JavaScript |
Medium |
372 |
Delete Node in a Linked List |
Python |
Easy |
373 |
Partition Array by Odd and Even |
Python |
Easy |
374 |
Spiral Matrix |
JavaScript |
Medium |
375 |
Clone Binary Tree |
JavaScript |
Easy |
376 |
Binary Tree Path Sum |
Python |
Easy |
378 |
Convert Binary Tree to Doubly Linked List |
Python |
Medium |
379 |
Reorder array to construct the minimum number |
|
Medium |
380 |
Intersection of Two Linked Lists |
Python |
Medium |
381 |
Spiral Matrix II |
|
Medium |
382 |
Triangle Count |
|
Medium |
383 |
Container With Most Water |
|
Medium |
384 |
Longest Substring Without Repeating Characters |
JavaScript |
Medium |
385 |
ArrayList |
|
Easy |
386 |
Longest Substring with At Most K Distinct Characters |
|
Medium |
387 |
The Smallest Difference |
JavaScript |
Medium |
388 |
Permutation Sequence |
|
Medium |
389 |
Valid Sudoku |
|
Easy |
390 |
Find Peak Element II |
|
Hard |
391 |
Number of Airplanes in the Sky |
|
Medium |
392 |
House Robber |
JavaScript |
Medium |
393 |
Best Time to Buy and Sell Stock IV |
JavaScript |
Medium |
394 |
Coins in a Line |
|
Medium |
395 |
Coins in a Line II |
|
Medium |
396 |
Coins in a Line III |
|
Hard |
397 |
Longest Continuous Increasing Subsequence |
JavaScript |
Easy |
398 |
Longest Continuous Increasing Subsequence II |
|
Hard |
399 |
Nuts & Bolts Problem |
|
Medium |
400 |
Maximum Gap |
|
Medium |
401 |
Kth Smallest Number in Sorted Matrix |
JavaScript |
Medium |
402 |
Continuous Subarray Sum |
JavaScript |
Medium |
403 |
Continuous Subarray Sum II |
|
Medium |
404 |
Subarray Sum II |
|
Medium |
405 |
Submatrix Sum |
|
Medium |
406 |
Minimum Size Subarray Sum |
JavaScript |
Medium |
407 |
Plus One |
JavaScript |
Easy |
408 |
Add Binary |
JavaScript |
Easy |
411 |
Gray Code |
|
Medium |
412 |
Candy |
|
Medium |
413 |
Reverse Integer |
JavaScript |
Easy |
414 |
Divide Two Integers |
|
Medium |
415 |
Valid Palindrome |
JavaScript |
Medium |
417 |
Valid Number |
|
Easy |
418 |
Integer to Roman |
JavaScript |
Medium |
419 |
Roman to Integer |
JavaScript |
Medium |
420 |
Count and Say |
|
Easy |
421 |
Simplify Path |
|
Medium |
422 |
Length of Last Word |
JavaScript |
Easy |
423 |
Valid Parentheses |
JavaScript |
Easy |
424 |
Evaluate Reverse Polish Notation |
Python |
Medium |
425 |
Letter Combinations of a Phone Number |
JavaScript |
Medium |
426 |
Restore IP Addresses |
JavaScript |
Medium |
427 |
Generate Parentheses |
JavaScript |
Medium |
428 |
Pow(x, n) |
Python |
Medium |
430 |
Scramble String |
|
Hard |
431 |
Connected Component in Undirected Graph |
|
Medium |
432 |
Find the Weak Connected Component in the Directed Graph |
|
Medium |
433 |
Number of Islands |
JavaScript |
Easy |
434 |
Number of Islands II |
|
Medium |
435 |
Post Office Problem |
|
Hard |
436 |
Maximal Square |
JavaScript |
Medium |
437 |
Copy Books |
|
Medium |
438 |
Copy Books II |
|
Hard |
439 |
Segment Tree Build II |
Python |
Medium |
440 |
Backpack III |
|
Medium |
442 |
Implement Trie (Prefix Tree) |
Python |
Medium |
443 |
Two Sum - Greater than target |
|
Medium |
445 |
Cosine Similarity |
Python |
Easy |
447 |
Search in a Big Sorted Array |
|
Medium |
448 |
Inorder Successor in BST |
Python |
Medium |
449 |
Char to Integer |
|
Naive |
450 |
Reverse Nodes in k-Group |
JavaScript |
Hard |
451 |
Swap Nodes in Pairs |
JavaScript |
Easy |
452 |
Remove Linked List Elements |
JavaScript |
Easy |
453 |
Flatten Binary Tree to Linked List |
JavaScript |
Easy |
454 |
Rectangle Area |
Python |
Naive |
455 |
Student ID |
|
Easy |
456 |
Reference |
|
Naive |
457 |
Classical Binary Search |
Python |
Easy |
458 |
Last Position of Target |
|
Easy |
459 |
Closest Number in Sorted Array |
|
Easy |
460 |
Find K Closest Elements |
JavaScript |
Medium |
461 |
Kth Smallest Numbers in Unsorted Array |
|
Medium |
462 |
Total Occurrence of Target |
|
Easy |
463 |
Sort Integers |
JavaScript |
Naive |
464 |
Sort Integers II |
JavaScript |
Easy |
465 |
Kth Smallest Sum In Two Sorted Arrays |
|
Hard |
466 |
Count Linked List Nodes |
JavaScript |
Naive |
467 |
Complete Binary Tree |
|
Easy |
468 |
Symmetric Binary Tree |
|
Easy |
469 |
Same Tree |
JavaScript |
Easy |
470 |
Tweaked Identical Binary Tree |
|
Easy |
471 |
Top K Frequent Words |
JavaScript |
Medium |
472 |
Binary Tree Path Sum III |
|
Hard |
473 |
Add and Search Word - Data structure design |
|
Medium |
474 |
Lowest Common Ancestor II |
Python |
Easy |
475 |
Binary Tree Maximum Path Sum II |
|
Medium |
476 |
Stone Game |
JavaScript |
Medium |
477 |
Surrounded Regions |
Python |
Medium |
478 |
Simple Calculator |
|
Naive |
479 |
Second Max of Array |
JavaScript |
Easy |
480 |
Binary Tree Paths |
JavaScript |
Easy |
481 |
Binary Tree Leaf Sum |
|
Easy |
482 |
Binary Tree Level Sum |
|
Easy |
483 |
Convert Linked List to Array List |
|
Naive |
484 |
Swap Two Integers in Array |
JavaScript |
Naive |
485 |
Generate ArrayList with Given Size |
|
Naive |
486 |
Merge K Sorted Arrays |
JavaScript |
Medium |
487 |
Name Deduplication |
|
Easy |
488 |
Happy Number |
JavaScript |
Easy |
489 |
Convert Array List to Linked List |
|
Easy |
490 |
Set of Stacks |
|
Easy |
491 |
Palindrome Number |
JavaScript |
Easy |
492 |
Implement Queue by Linked List |
|
Easy |
493 |
Implement Queue by Linked List II |
|
Easy |
494 |
Implement Stack by Two Queues |
|
Easy |
495 |
Implement Stack |
Python |
Easy |
496 |
Toy Factory |
Python |
Easy |
497 |
Shape Factory |
|
Easy |
498 |
Parking Lot |
|
Hard |
499 |
Word Count (Map Reduce) |
|
Medium |
500 |
Inverted Index |
|
Medium |
501 |
Design Twitter |
|
Medium |
502 |
Mini Cassandra |
|
Medium |
503 |
Anagram (Map Reduce) |
|
Medium |
504 |
Inverted Index (Map Reduce) |
|
Medium |
505 |
Web Logger |
|
Medium |
506 |
Movie Recommendation |
|
Easy |
507 |
Wiggle Sort II |
|
Hard |
508 |
Wiggle Sort |
|
Medium |
509 |
Mini Yelp |
|
Hard |
510 |
Maximal Rectangle |
|
Hard |
511 |
Swap Two Nodes in Linked List |
JavaScript |
Medium |
512 |
Decode Ways |
JavaScript |
Medium |
513 |
Perfect Squares |
JavaScript |
Medium |
514 |
Paint Fence |
|
Easy |
515 |
Paint House |
|
Medium |
516 |
Paint House II |
|
Hard |
517 |
Ugly Number |
JavaScript |
Easy |
518 |
Super Ugly Number |
JavaScript |
Medium |
519 |
Consistent Hashing |
|
Easy |
520 |
Consistent Hashing II |
|
Medium |
521 |
Remove Duplicate Numbers in Array |
|
Easy |
522 |
Tiny Url II |
|
Medium |
523 |
Url Parser |
|
Medium |
524 |
Left Pad |
Python |
Easy |
525 |
Mini Uber |
|
Medium |
526 |
Load Balancer |
|
Medium |
527 |
Trie Serialization |
|
Hard |
528 |
Flatten Nested List Iterator |
Python |
Medium |
529 |
Geohash |
|
Medium |
530 |
Geohash II |
|
Medium |
531 |
Six Degrees |
|
Medium |
532 |
Reverse Pairs |
JavaScript |
Medium |
533 |
Two Sum - Closest to target |
|
Medium |
534 |
House Robber II |
JavaScript |
Medium |
535 |
House Robber III |
|
Medium |
537 |
N-Gram (Map Reduce) |
|
Medium |
538 |
Memcache |
|
Medium |
539 |
Move Zeroes |
JavaScript |
Easy |
540 |
Zigzag Iterator |
Python |
Medium |
541 |
Zigzag Iterator II |
|
Medium |
543 |
Kth Largest in N Arrays |
|
Hard |
544 |
Top k Largest Numbers |
|
Medium |
545 |
Top k Largest Numbers II |
|
Medium |
546 |
Implement Queue by Interface |
|
Easy |
547 |
Intersection of Two Arrays |
Python |
Easy |
548 |
Intersection of Two Arrays II |
JavaScript |
Medium |
549 |
Top K Frequent Words (Map Reduce) |
|
Medium |
550 |
Top K Frequent Words II |
|
Hard |
551 |
Nested List Weight Sum |
Python |
Easy |
552 |
Create Maximum Number |
|
Hard |
553 |
Bomb Enemy |
|
Medium |
554 |
Sort Integers (Map Reduce) |
|
Medium |
555 |
Counting Bloom Filter |
|
Medium |
556 |
Standard Bloom Filter |
|
Medium |
557 |
Count Characters |
|
Easy |
558 |
Sliding Window Matrix Maximum |
|
Hard |
559 |
Trie Service |
|
Medium |
560 |
Friendship Service |
|
Easy |
562 |
Backpack IV |
JavaScript |
Medium |
563 |
Backpack V |
JavaScript |
Medium |
564 |
Combination Sum IV |
JavaScript |
Medium |
565 |
Heart Beat |
|
Medium |
566 |
GFS Client |
|
Medium |
569 |
Add Digits |
JavaScript |
Easy |
570 |
Find the Missing Number II |
|
Medium |
573 |
Build Post Office II |
|
Hard |
574 |
Build Post Office |
|
Medium |
575 |
Decode String |
|
Medium |
577 |
Merge K Sorted Interval Lists |
|
Medium |
578 |
Lowest Common Ancestor III |
Python |
Medium |
581 |
Longest Repeating Subsequence |
|
Medium |
582 |
Word Break II |
|
Hard |
584 |
Drop Eggs II |
|
Medium |
585 |
Maximum Number in Mountain Sequence |
JavaScript |
Medium |
586 |
Sqrt(x) II |
|
Medium |
587 |
Two Sum - Unique pairs |
|
Medium |
588 |
Partition Equal Subset Sum |
JavaScript |
Medium |
589 |
Connecting Graph |
|
Medium |
590 |
Connecting Graph II |
|
Medium |
591 |
Connecting Graph III |
|
Medium |
593 |
Stone Game II |
|
Medium |
594 |
strStr II |
|
Hard |
595 |
Binary Tree Longest Consecutive Sequence |
JavaScript |
Easy |
596 |
Minimum Subtree |
|
Easy |
597 |
Subtree with Maximum Average |
|
Easy |
598 |
Zombie in Matrix |
|
Medium |
599 |
Insert into a Cyclic Sorted List |
|
Medium |
600 |
Smallest Rectangle Enclosing Black Pixels |
|
Hard |
601 |
Flatten 2D Vector |
Python |
Medium |
602 |
Russian Doll Envelopes |
|
Hard |
603 |
Largest Divisible Subset |
|
Medium |
604 |
Window Sum |
JavaScript |
Easy |
605 |
Sequence Reconstruction |
|
Medium |
606 |
Kth Largest Element II |
|
Medium |
607 |
Two Sum III - Data structure design |
Python |
Easy |
608 |
Two Sum II - Input array is sorted |
JavaScript |
Medium |
609 |
Two Sum - Less than or equal to target |
|
Medium |
610 |
Two Sum - Difference equals to target |
|
Medium |
611 |
Knight Shortest Path |
|
Medium |
612 |
K Closest Points |
|
Medium |
613 |
High Five |
|
Medium |
614 |
Binary Tree Longest Consecutive Sequence II |
JavaScript |
Medium |
615 |
Course Schedule |
|
Medium |
616 |
Course Schedule II |
|
Medium |
617 |
Maximum Average Subarray II |
|
Medium |
618 |
Search Graph Nodes |
|
Medium |
619 |
Binary Tree Longest Consecutive Sequence III |
|
Medium |
620 |
Maximum Subarray IV |
|
Medium |
621 |
Maximum Subarray V |
|
Hard |
622 |
Frog Jump |
|
Hard |
623 |
K Edit Distance |
|
Hard |
624 |
Remove Substrings |
|
Medium |
625 |
Partition Array II |
|
Medium |
626 |
Rectangle Overlap |
|
Easy |
627 |
Longest Palindrome |
JavaScript |
Easy |
628 |
Maximum Subtree |
|
Easy |
629 |
Minimum Spanning Tree |
|
Hard |
630 |
Knight Shortest Path II |
|
Medium |
631 |
Maximal Square II |
|
Medium |
632 |
Binary Tree Maximum Node |
Python |
Naive |
633 |
Find the Duplicate Number |
JavaScript |
Hard |
634 |
Word Squares |
|
Hard |
635 |
Boggle Game |
|
Hard |
636 |
132 Pattern |
|
Medium |
637 |
Valid Word Abbreviation |
JavaScript |
Easy |
638 |
Isomorphic Strings |
JavaScript |
Easy |
639 |
Word Abbreviation |
|
Hard |
640 |
One Edit Distance |
|
Medium |
641 |
Missing Ranges |
|
Medium |
642 |
Moving Average from Data Stream |
Python |
Easy |
643 |
Longest Absolute File Path |
|
Medium |
644 |
Strobogrammatic Number |
JavaScript |
Easy |
645 |
Find the Celebrity |
|
Medium |
646 |
First Position Unique Character |
JavaScript |
Easy |
647 |
Find All Anagrams in a String |
JavaScript |
Easy |
648 |
Unique Word Abbreviation |
Python |
Medium |
649 |
Binary Tree Upside Down |
JavaScript |
Medium |
650 |
Find Leaves of Binary Tree |
Python |
Medium |
651 |
Binary Tree Vertical Order Traversal |
JavaScript |
Medium |
652 |
Factorization |
|
Medium |
653 |
Expression Add Operators |
|
Hard |
654 |
Sparse Matrix Multiplication |
|
Medium |
655 |
Add Strings |
JavaScript |
Easy |
656 |
Multiply Strings |
|
Medium |
657 |
Insert Delete GetRandom O(1) |
|
Medium |
658 |
Swap Without Extra Variable (Only C++) |
|
Easy |
659 |
Encode and Decode Strings |
Python |
Medium |
660 |
Read N Characters Given Read4 II - Call multiple times |
|
Hard |
661 |
Convert BST to Greater Tree |
JavaScript |
Easy |
662 |
Guess Number Higher or Lower |
Python |
Easy |
663 |
Walls and Gates |
|
Medium |
664 |
Counting Bits |
JavaScript |
Medium |
665 |
Range Sum Query 2D - Immutable |
Python |
Medium |
666 |
Guess Number Higher or Lower II |
|
Medium |
667 |
Longest Palindromic Subsequence |
|
Medium |
668 |
Ones and Zeroes |
|
Medium |
669 |
Coin Change |
JavaScript |
Medium |
670 |
Predict the Winner |
JavaScript |
Medium |
671 |
Rotate Words |
Python |
Easy |
676 |
Decode Ways II |
|
Hard |
677 |
Number of Big Islands |
|
Medium |
678 |
Shortest Palindrome |
|
Medium |
679 |
Unique Paths III |
|
Hard |
680 |
Split String |
Python |
Medium |
681 |
First Missing Prime Number |
|
Medium |
683 |
Word Break III |
|
Medium |
684 |
Missing String |
JavaScript |
Easy |
685 |
First Unique Number in Data Stream |
JavaScript |
Medium |
686 |
Remove Arbitrary Space |
JavaScript |
Easy |
688 |
The Number In Words |
|
Medium |
689 |
Two Sum IV - Input is a BST |
Python |
Medium |
690 |
Factorial |
|
Hard |
691 |
Recover Binary Search Tree |
JavaScript |
Medium |
692 |
Sliding Window Unique Elements Sum |
JavaScript |
Medium |
693 |
Remove Dights |
|
Easy |
696 |
Course Schedule III |
|
Hard |
697 |
Sum of Square Numbers |
JavaScript |
Easy |
698 |
Maximum Distance in Arrays |
|
Medium |
699 |
Check Sum of K Primes |
|
Hard |
700 |
Cutting a Rod |
JavaScript |
Medium |
701 |
Trim a Binary Search Tree |
JavaScript |
Medium |
702 |
Concatenated String with Uncommon Characters of Two Strings |
JavaScript |
Easy |
703 |
Folding Array |
|
Hard |
704 |
Bulb Switcher II |
|
Medium |
706 |
Binary Watch |
|
Medium |
707 |
Optimal Account Balancing |
|
Super |
708 |
Elevator system - OO Design |
|
Hard |
709 |
Restaurant OO Design |
|
Hard |
710 |
Hotel OO Design |
|
Hard |
712 |
Vending machine OO Design |
|
Hard |
714 |
Black Jack OO Design |
|
Medium |
717 |
Tree Longest Path With Same Value |
|
Medium |
718 |
Repeat String |
|
Medium |
719 |
Calculate Maximum Value |
|
Medium |
720 |
Rearrange a String With Integers |
JavaScript |
Easy |
721 |
Next Sparse Number |
|
Hard |
722 |
Maximum Subarray VI |
|
Super |
723 |
Rotate Bits - Left |
|
Medium |
724 |
Minimum Partition |
|
Medium |
725 |
Boolean Parenthesization |
|
Hard |
726 |
Check Full Binary Tree |
JavaScript |
Medium |
727 |
Chinese Remainder Theorem |
|
Hard |
728 |
Three Distinct Factors |
|
Medium |
729 |
Last Digit By Factorial Divide |
|
Medium |
730 |
Sum of All Subsets |
JavaScript |
Easy |
731 |
Restaurant II OO Design |
|
Hard |
732 |
Hotel II OO Design |
|
Hard |
734 |
Number of Subsequences of Form a^i b^j c^k |
|
Medium |
735 |
Replace With Greatest From Right |
Python |
Medium |
737 |
Find Elements in Matrix |
JavaScript |
Easy |
738 |
Count Different Palindromic Subsequences |
|
Hard |
739 |
24 Game |
|
Hard |
740 |
Coin Change 2 |
JavaScript |
Medium |
741 |
Calculate Maximum Value II |
|
Medium |
742 |
Self Dividing Numbers |
|
Medium |
743 |
Monotone Increasing Digits |
|
Medium |
744 |
Sum of first K even-length Palindrome numbers |
|
Medium |
745 |
Palindromic Ranges |
|
Medium |
746 |
Design Tic-Tac-Toe |
|
Hard |
747 |
Coffee Maker OO Design |
|
Medium |
748 |
Kindle OO Design |
|
Medium |
749 |
John's backyard garden |
JavaScript |
Easy |
750 |
Portal |
|
Medium |
751 |
John's business |
|
Medium |
752 |
Rogue Knight Sven |
|
Medium |
756 |
Multiply Two Numbers |
JavaScript |
Easy |
757 |
Shortest Unordered Array |
|
Easy |
759 |
Time Angle |
JavaScript |
Easy |
760 |
Binary Tree Right Side View |
JavaScript |
Medium |
761 |
Smallest Subset |
JavaScript |
Medium |
762 |
Longest Common Subsequence II |
|
Hard |
763 |
Hex Conversion |
JavaScript |
Easy |
764 |
Calculate Circumference And Area |
Python |
Easy |
765 |
Valid Triangle |
JavaScript |
Easy |
766 |
Leap Year |
JavaScript |
Easy |
767 |
Reverse Array |
JavaScript |
Easy |
768 |
Yang Hui Triangle |
JavaScript |
Easy |
769 |
Spiral Array |
JavaScript |
Easy |
770 |
Maximum and Minimum |
JavaScript |
Easy |
771 |
Double Factorial |
|
Easy |
772 |
Group Anagrams |
|
Medium |
773 |
Vlid Anagram |
JavaScript |
Easy |
774 |
Repeated DNA |
JavaScript |
Medium |
775 |
Palindrome Pairs |
|
Hard |
776 |
Strobogrammatic Number II |
|
Medium |
777 |
Valid Perfect Square |
JavaScript |
Easy |
778 |
Pacific Atlantic Water Flow |
Python |
Medium |
779 |
Generalized Abbreviation |
|
Medium |
780 |
Remove Invalid Parentheses |
|
Hard |
782 |
AND and OR |
|
Medium |
783 |
Minimum Risk Path |
|
Hard |
784 |
The Longest Common Prefix II |
|
Easy |
785 |
Maximum Weighted Sum Path |
JavaScript |
Medium |
786 |
Linked List Weighted Sum In Reverse Order |
|
Easy |
787 |
The Maze |
|
Medium |
788 |
The Maze II |
|
Medium |
789 |
The Maze III |
|
Hard |
790 |
Parser |
|
Medium |
791 |
Merge Number |
JavaScript |
Medium |
792 |
Kth Prime Number |
|
Easy |
793 |
Intersection of Arrays |
|
Medium |
794 |
Sliding Puzzle II |
|
Hard |
795 |
4-Way Unique Paths |
|
Hard |
796 |
Open the Lock |
|
Hard |
797 |
Reach a Number |
|
Easy |
798 |
Backpack VII |
|
Medium |
799 |
Backpack VIII |
|
Medium |
800 |
Backpack IX |
JavaScript |
Medium |
801 |
Backpack X |
|
Medium |
802 |
Sudoku Solver |
|
Hard |
803 |
Shortest Distance from All Buildings |
|
Hard |
804 |
Number of Distinct Islands II |
|
Hard |
805 |
Maximum Association Set |
|
Medium |
806 |
Buy Fruits |
|
Medium |
807 |
Palindrome Number II |
|
Easy |
808 |
Movie Network |
|
Medium |
809 |
K-th Symbol in Grammar |
|
Medium |
810 |
Swim in Rising Water |
|
Hard |
811 |
Swap Adjacent in LR String |
|
Medium |
812 |
Bold Words in String |
|
Easy |
813 |
Find Anagram Mappings |
JavaScript |
Easy |
814 |
Shortest Path in Undirected Graph |
|
Medium |
815 |
Course Schedule IV |
|
Hard |
816 |
Traveling Salesman Problem |
|
Hard |
817 |
Range Sum Query 2D - Mutable |
|
Medium |
818 |
Subset With Target |
|
Hard |
819 |
Word Sorting |
|
Medium |
820 |
Rectangle |
|
Medium |
821 |
Time Intersection |
|
Medium |
822 |
Reverse Order Storage |
JavaScript |
Easy |
823 |
Input Stream |
JavaScript |
Easy |
824 |
Single Number IV |
JavaScript |
Medium |
825 |
Bus Station |
|
Hard |
826 |
Computer Maintenance |
|
Hard |
828 |
Word Pattern |
JavaScript |
Easy |
829 |
Word Pattern II |
|
Hard |
830 |
String Sort |
|
Easy |
831 |
3Sum II |
|
Medium |
832 |
Count Negative Number |
|
Medium |
833 |
Process Sequence |
|
Medium |
834 |
Remove Duplicate Letters |
|
Easy |
835 |
Hamming Distance |
JavaScript |
Easy |
836 |
Partition to K Equal Sum Subsets |
|
Hard |
837 |
Palindromic Substrings |
JavaScript |
Easy |
838 |
Subarray Sum Equals K |
JavaScript |
Easy |
839 |
Merge Two Sorted Interval Lists |
|
Easy |
840 |
Range Sum Query - Mutable |
Python |
Medium |
841 |
String Replace |
|
Hard |
842 |
Origami |
|
Medium |
843 |
Digital Flip |
JavaScript |
Medium |
844 |
Number Pair Statistics |
|
Easy |
845 |
Greatest Common Divisor |
JavaScript |
Easy |
846 |
Multi-keyword Sort |
JavaScript |
Easy |
848 |
Minimize Max Distance to Gas Station |
|
Hard |
849 |
Basic Calculator III |
|
Hard |
851 |
Pour Water |
|
Medium |
852 |
IP to CIDR |
|
Easy |
853 |
Number Of Corner Rectangles |
|
Medium |
854 |
Closest Leaf in a Binary Tree |
JavaScript |
Medium |
855 |
Sentence Similarity II |
|
Medium |
856 |
Sentence Similarity |
JavaScript |
Easy |
857 |
Minimum Window Subsequence |
|
Hard |
858 |
Candy Crush |
|
Medium |
859 |
Max Stack |
Python |
Hard |
860 |
Number of Distinct Islands |
|
Medium |
861 |
K Empty Slots |
|
Hard |
862 |
Next Closest Time |
|
Medium |
863 |
Binary Tree Path Sum IV |
|
Medium |
864 |
Equal Tree Partition |
JavaScript |
Medium |
865 |
Remove 9 |
|
Hard |
866 |
Coin Path |
|
Hard |
867 |
4 Keys Keyboard |
|
Medium |
868 |
Maximum Average Subarray |
JavaScript |
Easy |
869 |
Find the Derangement of An Array |
|
Medium |
871 |
Minimum Factorization |
|
Medium |
872 |
Kill Process |
Python |
Easy |
873 |
Squirrel Simulation |
|
Medium |
874 |
Maximum Vacation Days |
|
Hard |
875 |
Longest Line of Consecutive One in Matrix |
JavaScript |
Medium |
876 |
Split Concatenated Strings |
|
Medium |
877 |
Split Array with Equal Sum |
|
Medium |
878 |
Boundary of Binary Tree |
|
Medium |
879 |
Output Contest Matches |
|
Medium |
880 |
Construct Binary Tree from String |
JavaScript |
Medium |
881 |
Lonely Pixel II |
|
Medium |
883 |
Max Consecutive Ones II |
JavaScript |
Medium |
884 |
Find Permutation |
|
Medium |
885 |
Encode String with Shortest Length |
|
Hard |
886 |
Convex Polygon |
|
Medium |
887 |
Ternary Expression Parser |
|
Medium |
888 |
Valid Word Square |
JavaScript |
Easy |
889 |
Sentence Screen Fitting |
|
Medium |
890 |
Minimum Unique Word Abbreviation |
|
Hard |
891 |
Valid Palindrome II |
JavaScript |
Medium |
892 |
Alien Dictionary |
|
Hard |
893 |
Longest Palindromic Substring II |
|
Hard |
894 |
Pancake Sorting |
|
Medium |
895 |
Friend Request |
|
Easy |
896 |
Prime Product |
|
Medium |
897 |
Island City |
|
Easy |
898 |
Leftmost One |
|
Medium |
900 |
Closest Binary Search Tree Value |
JavaScript |
Easy |
901 |
Closest Binary Search Tree Value II |
|
Hard |
902 |
Kth Smallest Element in a BST |
JavaScript |
Medium |
903 |
Range Addition |
|
Medium |
904 |
Plus One Linked List |
JavaScript |
Medium |
905 |
Nested List Weight Sum II |
|
Medium |
906 |
Sort Transformed Array |
JavaScript |
Medium |
908 |
Line Reflection |
JavaScript |
Medium |
909 |
Android Unlock Patterns |
|
Medium |
910 |
Largest BST Subtree |
|
Medium |
911 |
Maximum Size Subarray Sum Equals k |
JavaScript |
Medium |
912 |
Best Meeting Point |
|
Hard |
913 |
Flip Game II |
|
Medium |
914 |
Flip Game |
JavaScript |
Easy |
915 |
Inorder Predecessor in BST |
|
Medium |
916 |
Palindrome Permutation |
JavaScript |
Easy |
917 |
Palindrome Permutation II |
|
Medium |
918 |
3Sum Smaller |
JavaScript |
Medium |
919 |
Meeting Rooms II |
|
Medium |
920 |
Meeting Rooms |
JavaScript |
Easy |
921 |
Count Univalue Subtrees |
|
Medium |
922 |
Group Shifted Strings |
|
Medium |
923 |
Strobogrammatic Number III |
|
Hard |
924 |
Shortest Word Distance |
JavaScript |
Easy |
926 |
Shortest Word Distance III |
|
Medium |
927 |
Reverse Words in a String II |
JavaScript |
Medium |
928 |
Longest Substring with At Most Two Distinct Characters |
|
Hard |
930 |
Connected Components in List |
|
Medium |
931 |
Median of K Sorted Arrays |
|
Hard |
932 |
Friends Within Three Jumps |
|
Medium |
933 |
Tuple Multiply |
|
Medium |
934 |
Unlock Problem |
|
Medium |
935 |
Cartesian Product |
|
Medium |
936 |
Capitalizes The First Letter |
JavaScript |
Easy |
937 |
How Many Problem Can I Accept |
|
Medium |
939 |
Binary Tree Kth Floor Node |
|
Medium |
940 |
Maximum Absolute Value |
|
Medium |
941 |
Sliding Puzzle |
|
Hard |
943 |
Range Sum Query - Immutable |
Python |
Easy |
944 |
Maximum Submatrix |
|
Medium |
945 |
Task Scheduler |
|
Medium |
946 |
233 Matrix |
|
Medium |
947 |
Matrix Power Series |
|
Hard |
948 |
Sequence Count |
|
Super |
949 |
Fibonacci II |
|
Medium |
950 |
Sliding Puzzle III |
|
Hard |
951 |
Rearrange |
|
Easy |
952 |
Digital Problem |
|
Easy |
953 |
The Biggest Score On The Tree |
|
Medium |
954 |
Insert Delete GetRandom O(1) - Duplicates allowed |
|
Hard |
955 |
Implement Queue by Circular Array |
Python |
Medium |
956 |
Data Segmentation |
|
Easy |
957 |
Radar Detection |
|
Easy |
958 |
Palindrome Data Stream |
|
Easy |
959 |
K Spaced Array Sorting |
|
Medium |
960 |
First Unique Number in Data Stream II |
Python |
Medium |
969 |
Longest Repeating Substring |
|
Medium |
970 |
Big Business |
|
Easy |
971 |
Surplus Value Backpack |
|
Hard |
972 |
Deliver The Message |
|
Medium |
973 |
1-bit and 2-bit Characters |
JavaScript |
Easy |
974 |
01 Matrix |
JavaScript |
Medium |
975 |
2 Keys Keyboard |
|
Medium |
976 |
4Sum II |
JavaScript |
Medium |
977 |
Base 7 |
JavaScript |
Easy |
978 |
Basic Calculator |
|
Medium |
979 |
Additive Number |
|
Medium |
980 |
Basic Calculator II |
|
Medium |
981 |
Basic Calculator IV |
|
Hard |
982 |
Arithmetic Slices |
JavaScript |
Medium |
983 |
Baseball Game |
JavaScript |
Easy |
984 |
Arithmetic Slices II - Subsequence |
|
Hard |
985 |
Can I Win |
|
Hard |
986 |
Battleships in a Board |
Python |
Medium |
987 |
Binary Number with Alternating Bits |
JavaScript |
Easy |
988 |
Arranging Coins |
JavaScript |
Easy |
989 |
Array Nesting |
|
Medium |
990 |
Beautiful Arrangement |
|
Medium |
991 |
Bulb Switcher |
|
Medium |
992 |
Beautiful Arrangement II |
|
Medium |
993 |
Array Partition I |
JavaScript |
Easy |
994 |
Contiguous Array |
JavaScript |
Medium |
995 |
Best Time to Buy and Sell Stock with Cooldown |
JavaScript |
Medium |
996 |
Maximum Slope Straight Line |
|
Medium |
997 |
Print Organization Chart |
|
Medium |
998 |
Construction Queue |
|
Hard |
1000 |
Best Time to Buy and Sell Stock with Transaction Fee |
JavaScript |
Medium |
1001 |
Asteroid Collision |
JavaScript |
Medium |
1002 |
Bus Routes |
|
Medium |
1003 |
Binary Tree Pruning |
JavaScript |
Easy |
1004 |
Largest Sum of Averages |
JavaScript |
Medium |
1005 |
Largest Triangle Area |
JavaScript |
Easy |
1006 |
Subdomain Visit Count |
JavaScript |
Easy |
1007 |
Chalkboard XOR Game |
|
Medium |
1008 |
Expressive Words |
|
Medium |
1010 |
Max Increase to Keep City Skyline |
JavaScript |
Medium |
1011 |
Number of Lines To Write String |
JavaScript |
Easy |
1012 |
Split Array With Same Average |
|
Hard |
1013 |
Unique Morse Code Words |
JavaScript |
Easy |
1014 |
Bricks Falling When Hit |
|
Hard |
1015 |
Find Eventual Safe States |
|
Medium |
1016 |
Minimum Swaps To Make Sequences Increasing |
|
Medium |
1017 |
Similar RGB Color |
|
Easy |
1018 |
Champagne Tower |
JavaScript |
Medium |
1019 |
Smallest Rotation with Highest Score |
|
Hard |
1020 |
All Paths From Source to Target |
|
Medium |
1021 |
Number of Subarrays with Bounded Maximum |
|
Medium |
1022 |
Valid Tic-Tac-Toe State |
JavaScript |
Medium |
1023 |
Preimage Size of Factorial Zeroes Function |
|
Hard |
1024 |
Number of Matching Subsequences |
|
Medium |
1025 |
Custom Sort String |
|
Medium |
1026 |
Domino and Tromino Tiling |
|
Medium |
1027 |
Escape The Ghosts |
JavaScript |
Medium |
1028 |
Rotated Digits |
|
Easy |
1029 |
Cheapest Flights Within K Stops |
|
Medium |
1030 |
K-th Smallest Prime Fraction |
|
Hard |
1031 |
Is Graph Bipartite? |
|
Medium |
1032 |
Letter Case Permutation |
JavaScript |
Easy |
1033 |
Minimum Difference Between BST Nodes |
JavaScript |
Easy |
1034 |
Transform to Chessboard |
|
Hard |
1035 |
Rabbits in Forest |
JavaScript |
Medium |
1036 |
Reach Points |
|
Hard |
1037 |
Global and Local Inversions |
|
Medium |
1038 |
Jewels And Stones |
JavaScript |
Easy |
1039 |
Max Chunks To Make Sorted |
|
Medium |
1040 |
Max Chunks To Make Sorted II |
|
Hard |
1041 |
Reorganize String |
|
Medium |
1042 |
Toeplitz Matrix |
JavaScript |
Easy |
1043 |
Couples Holding Hands |
|
Hard |
1044 |
Largest Plus Sign |
|
Medium |
1045 |
Partition Labels |
|
Medium |
1046 |
Prime Number of Set Bits in Binary Representation |
|
Easy |
1047 |
Special Binary String |
|
Medium |
1048 |
Set Intersection Size At Least Two |
|
Hard |
1049 |
Pyramid Transition Matrix |
|
Medium |
1050 |
Cracking the Safe |
|
Hard |
1051 |
Contain Virus |
|
Hard |
1052 |
Shortest Completing Word |
|
Medium |
1053 |
Largest Number At Least Twice of Others |
JavaScript |
Easy |
1054 |
Min Cost Climbing Stairs |
JavaScript |
Easy |
1056 |
Find Smallest Letter Greater Than Target |
JavaScript |
Easy |
1057 |
Network Delay Time |
|
Medium |
1058 |
Cherry Pickup |
|
Hard |
1059 |
Delete and Earn |
JavaScript |
Medium |
1060 |
Daily Temperatures |
Python |
Medium |
1061 |
Parse Lisp Expression |
|
Hard |
1062 |
Flood Fill |
JavaScript |
Easy |
1063 |
My Calendar III |
|
Hard |
1064 |
My Calendar II |
|
Medium |
1065 |
My Calendar I |
|
Medium |
1066 |
Verify Preorder Serialization of a Binary Tree |
JavaScript |
Medium |
1067 |
Split Linked List in Parts |
|
Medium |
1068 |
Find Pivot Index |
JavaScript |
Easy |
1069 |
Remove Comments |
|
Medium |
1070 |
Accounts Merge |
|
Medium |
1071 |
Longest Word in Dictionary |
|
Easy |
1072 |
Find K-th Smallest Pair Distance |
|
Hard |
1073 |
Maximum Length of Repeated Subarray |
|
Medium |
1074 |
Range Module |
|
Hard |
1075 |
Subarray Product Less Than K |
|
Medium |
1076 |
Minimum ASCII Delete Sum for Two Strings |
JavaScript |
Medium |
1077 |
Falling Squares |
|
Hard |
1078 |
Degree of an Array |
|
Easy |
1079 |
Count Binary Substrings |
|
Easy |
1080 |
Max Area of Island |
JavaScript |
Easy |
1081 |
Stickers to Spell Word |
|
Hard |
1082 |
Employee Importance |
Python |
Easy |
1083 |
Maximum Sum of 3 Non-Overlapping Subarrays |
|
Hard |
1084 |
Knight Probability in Chessboard |
|
Medium |
1085 |
Longest Univalue Path |
JavaScript |
Easy |
1086 |
Repeated String Match |
|
Easy |
1087 |
Redundant Connection II |
|
Hard |
1088 |
Redundant Connection |
|
Medium |
1089 |
Valid Parenthesis String |
JavaScript |
Medium |
1090 |
Map Sum Pairs |
|
Medium |
1092 |
Cut Off Trees for Golf Event |
|
Hard |
1093 |
Number of Longest Increasing Subsequence |
JavaScript |
Medium |
1094 |
Second Minimum Node In a Binary Tree |
JavaScript |
Easy |
1095 |
Maximum Swap |
JavaScript |
Medium |
1097 |
Kth Smallest Number in Multiplication Table |
|
Hard |
1098 |
Path Sum IV |
|
Medium |
1099 |
Non-decreasing Array |
JavaScript |
Easy |
1100 |
Strange Printer |
|
Hard |
1101 |
Maximum Width of Binary Tree |
JavaScript |
Medium |
1102 |
Image Smoother |
|
Easy |
1103 |
Split Array into Consecutive Subsequences |
|
Medium |
1104 |
Judge Route Circle |
|
Easy |
1105 |
Print Binary Tree |
JavaScript |
Medium |
1106 |
Maximum Binary Tree |
JavaScript |
Easy |
1108 |
Find Duplicate Subtrees |
|
Medium |
1109 |
Dota2 Senate |
|
Medium |
1110 |
Replace Words |
|
Medium |
1111 |
Maximum Length of Pair Chain |
|
Medium |
1112 |
Set Mismatch |
JavaScript |
Easy |
1113 |
Solve the Equation |
|
Medium |
1114 |
Shopping Offers |
|
Medium |
1115 |
Average of Levels in Binary Tree |
JavaScript |
Easy |
1116 |
Exclusive Time of Functions |
|
Medium |
1117 |
Smallest Range |
|
Hard |
1118 |
K Inverse Pairs Array |
|
Hard |
1119 |
Maximum Product of Three Numbers |
JavaScript |
Easy |
1122 |
Add One Row to Tree |
JavaScript |
Medium |
1125 |
Jump Pillar |
|
Medium |
1126 |
Merge Two Binary Trees |
JavaScript |
Easy |
1127 |
Add Bold Tag in String |
|
Medium |
1129 |
Smallest Subtree with All the Deepest Nodes |
|
Medium |
1130 |
Magic circle |
|
Hard |
1131 |
The Function in Permutations |
|
Medium |
1132 |
Valid Triangle Number |
|
Medium |
1133 |
Group Buy |
|
Easy |
1134 |
Find Duplicate File in System |
|
Medium |
1135 |
Feature extraction |
|
Easy |
1136 |
High Click Induction Area |
|
Medium |
1137 |
Construct String from Binary Tree |
JavaScript |
Easy |
1138 |
Can Place Flowers |
JavaScript |
Easy |
1139 |
the kth subarray |
|
Hard |
1141 |
The month's days |
|
Easy |
1142 |
Non-negative Integers without Consecutive Ones |
|
Hard |
1143 |
Minimum Index Sum of Two Lists |
JavaScript |
Easy |
1144 |
Range Addition II |
|
Easy |
1145 |
Associated query |
|
Easy |
1146 |
Chess piece rotation |
|
Easy |
1147 |
Work Plan |
|
Medium |
1148 |
Longest Harmonious Subsequence |
|
Easy |
1149 |
Valid Square |
JavaScript |
Medium |
1150 |
Fraction Addition and Subtraction |
|
Medium |
1151 |
Tag Validator |
|
Hard |
1152 |
Erect the Fence |
|
Hard |
1153 |
string sorting |
|
Easy |
1154 |
Attendance Judgment |
|
Easy |
1156 |
Delete Operation for Two Strings |
JavaScript |
Medium |
1157 |
Shortest Unsorted Continuous Subarray |
|
Easy |
1158 |
Plant flowers |
|
Medium |
1159 |
Longest Common Prefix III |
|
Hard |
1160 |
Campus Bikes |
|
Medium |
1161 |
goods transfer |
|
Hard |
1162 |
Out of Boundary Paths |
|
Medium |
1163 |
Distribute Candies |
JavaScript |
Easy |
1164 |
Wiggle Subsequence |
|
Medium |
1165 |
Subtree of Another Tree |
JavaScript |
Easy |
1166 |
Recommended Results are Scattered |
|
Easy |
1167 |
Top three numbers |
|
Medium |
1168 |
array score |
|
Easy |
1169 |
Permutation in String |
JavaScript |
Medium |
1170 |
Reshape the Matrix |
JavaScript |
Easy |
1171 |
Find the Closest Palindrome |
|
Hard |
1172 |
Binary Tree Tilt |
JavaScript |
Easy |
1173 |
Reverse Words in a String III |
JavaScript |
Easy |
1174 |
Next Greater Element III |
|
Medium |
1175 |
Brick Wall |
|
Medium |
1176 |
Optimal Division |
|
Medium |
1177 |
Student Attendance Record II |
|
Hard |
1178 |
Student Attendance Record I |
JavaScript |
Easy |
1179 |
Friend Circles |
|
Medium |
1180 |
Remove Boxes |
|
Hard |
1181 |
Diameter of Binary Tree |
JavaScript |
Easy |
1182 |
Reverse String II |
JavaScript |
Easy |
1183 |
Single Element in a Sorted Array |
JavaScript |
Medium |
1184 |
Minimum Time Difference |
JavaScript |
Medium |
1185 |
Complex Number Multiplication |
JavaScript |
Medium |
1186 |
Encode and Decode TinyURL |
Python |
Medium |
1187 |
K-diff Pairs in an Array |
JavaScript |
Easy |
1188 |
Minimum Absolute Difference in BST |
JavaScript |
Easy |
1189 |
Minesweeper |
Python |
Medium |
1190 |
Longest Word in Dictionary through Deleting |
|
Medium |
1191 |
Longest Uncommon Subsequence II |
|
Medium |
1192 |
Longest Uncommon Subsequence I |
|
Easy |
1193 |
Detect Capital |
JavaScript |
Easy |
1194 |
Super Washing Machines |
|
Hard |
1195 |
Find Largest Value in Each Tree Row |
JavaScript |
Medium |
1196 |
Freedom Trail |
|
Hard |
1197 |
Find Bottom Left Tree Value |
JavaScript |
Medium |
1198 |
Most Frequent Subtree Sum |
|
Medium |
1199 |
Perfect Number |
|
Easy |
1200 |
Relative Ranks |
JavaScript |
Easy |
1201 |
Next Greater Element II |
|
Medium |
1202 |
IPO |
|
Hard |
1203 |
Find Mode in Binary Search Tree |
JavaScript |
Medium |
1204 |
Keyboard Row |
JavaScript |
Easy |
1205 |
Diagonal Traverse |
JavaScript |
Medium |
1206 |
Next Greater Element I |
|
Easy |
1207 |
Teemo Attacking |
|
Medium |
1208 |
Target Sum |
JavaScript |
Medium |
1209 |
Construct the Rectangle |
JavaScript |
Easy |
1210 |
Increasing Subsequences |
|
Medium |
1211 |
Zuma Game |
|
Hard |
1212 |
Max Consecutive Ones |
JavaScript |
Easy |
1213 |
Smallest Good Base |
|
Hard |
1214 |
License Key Formatting |
JavaScript |
Easy |
1215 |
Magical String |
|
Medium |
1216 |
Largest Palindrome Product |
|
Easy |
1217 |
Total Hamming Distance |
|
Medium |
1218 |
Number Complement |
JavaScript |
Easy |
1219 |
Heaters |
|
Easy |
1220 |
Matchsticks to Square |
|
Medium |
1221 |
Concatenated Words |
|
Hard |
1222 |
Validate IP Address |
|
Medium |
1223 |
Unique Substrings in Wraparound String |
|
Medium |
1224 |
Count The Repetitions |
|
Hard |
1225 |
Island Perimeter |
|
Easy |
1226 |
Minimum Moves to Equal Array Elements II |
|
Medium |
1227 |
Repeated Substring Pattern |
JavaScript |
Easy |
1228 |
Poor Pigs |
|
Easy |
1229 |
Circular Array Loop |
|
Medium |
1230 |
Assign Cookies |
JavaScript |
Easy |
1231 |
Minimum Moves to Equal Array Elements |
|
Easy |
1232 |
Minimum Number of Arrows to Burst Balloons |
|
Medium |
1235 |
Serialize and Deserialize BST |
Python |
Medium |
1236 |
Find All Numbers Disappeared in an Array |
JavaScript |
Easy |
1237 |
Number of Boomerangs |
JavaScript |
Easy |
1238 |
Find All Duplicates in an Array |
Python |
Medium |
1239 |
K-th Smallest in Lexicographical Order |
|
Hard |
1240 |
Path Sum III |
|
Easy |
1241 |
Find Right Interval |
|
Medium |
1242 |
Non-overlapping Intervals |
|
Medium |
1243 |
Number of Segments in a String |
JavaScript |
Easy |
1244 |
Minimum Genetic Mutation |
|
Medium |
1245 |
All O`one Data Structure |
|
Hard |
1246 |
Longest Repeating Character Replacement |
|
Medium |
1247 |
Reconstruct Original Digits from English |
|
Medium |
1248 |
Maximum XOR of Two Numbers in an Array |
|
Medium |
1249 |
Strong Password Checker |
|
Hard |
1250 |
Third Maximum Number |
JavaScript |
Easy |
1251 |
Split Array Largest Sum |
JavaScript |
Hard |
1252 |
Queue Reconstruction by Height |
|
Medium |
1253 |
Convert a Number to Hexadecimal |
JavaScript |
Easy |
1254 |
Sum of Left Leaves |
JavaScript |
Easy |
1255 |
Remove K Digits |
|
Medium |
1256 |
Nth Digit |
|
Easy |
1257 |
Evaluate Division |
|
Medium |
1258 |
Beautiful Subarrays |
|
Medium |
1259 |
Integer Replacement |
|
Medium |
1260 |
Rotate Function |
|
Medium |
1261 |
Longest Substring with At Least K Repeating Characters |
|
Medium |
1262 |
UTF-8 Validation |
|
Medium |
1263 |
Is Subsequence |
JavaScript |
Medium |
1264 |
Perfect Rectangle |
|
Hard |
1265 |
Elimination Game |
|
Medium |
1266 |
Find the Difference |
JavaScript |
Easy |
1267 |
Lexicographical Numbers |
JavaScript |
Medium |
1269 |
Handkerchief Throwing |
|
Medium |
1270 |
Ransom Note |
JavaScript |
Easy |
1271 |
Critical Connections in a Network |
|
Hard |
1272 |
Kth Smallest Element in a Sorted Matrix |
JavaScript |
Medium |
1273 |
Maximum Length of Increasing String |
|
Hard |
1274 |
Find K Pairs with Smallest Sums |
|
Medium |
1275 |
Super Pow |
JavaScript |
Medium |
1276 |
Sum of Two Integers |
|
Easy |
1277 |
Water and Jug Problem |
|
Medium |
1278 |
Max Sum of Rectangle No Larger Than K |
|
Hard |
1279 |
Count Numbers with Unique Digits |
|
Medium |
1280 |
Data Stream as Disjoint Intervals |
|
Hard |
1281 |
Top K Frequent Elements |
Python |
Medium |
1282 |
Reverse Vowels of a String |
JavaScript |
Easy |
1283 |
Reverse String |
JavaScript |
Easy |
1284 |
Integer Break |
JavaScript |
Medium |
1285 |
Power of Four |
JavaScript |
Easy |
1286 |
Self Crossing |
|
Hard |
1287 |
Increasing Triplet Subsequence |
JavaScript |
Medium |
1288 |
Reconstruct Itinerary |
|
Medium |
1289 |
Number of Atoms |
|
Hard |
1290 |
Patching Array |
|
Hard |
1291 |
Sports Meeting |
|
Medium |
1292 |
Odd Even Linked List |
JavaScript |
Medium |
1293 |
Count of Range Sum |
|
Hard |
1294 |
Power of Three |
JavaScript |
Easy |
1295 |
Prime Factor Statistics |
|
Easy |
1296 |
Maximum Product of Word Lengths |
|
Medium |
1297 |
Count of Smaller Numbers After Self |
|
Hard |
1298 |
Minimum Height Trees |
|
Medium |
1299 |
Bulls and Cows |
|
Medium |
1300 |
Bash Game |
JavaScript |
Easy |
1301 |
Game of Life |
|
Medium |
1302 |
People Counting |
|
Easy |
1303 |
H-Index II |
|
Medium |
1304 |
H-Index |
|
Medium |
1305 |
Integer to English Words |
|
Medium |
1306 |
Travel Plan II |
|
Hard |
1307 |
Verify Preorder Sequence in Binary Search Tree |
JavaScript |
Medium |
1308 |
Factor Combinations |
|
Medium |
1309 |
Different Ways to Add Parentheses |
|
Medium |
1310 |
Product of Array Except Self |
JavaScript |
Medium |
1311 |
Lowest Common Ancestor of a Binary Search Tree |
Python |
Easy |
1312 |
Number of Digit One |
JavaScript |
Hard |
1313 |
Bipartite Graph |
|
Medium |
1314 |
Power of Two |
JavaScript |
Easy |
1315 |
Summary Ranges |
|
Medium |
1316 |
Luck Number |
|
Hard |
1317 |
Count Complete Tree Nodes |
JavaScript |
Medium |
1318 |
Contains Duplicate III |
|
Medium |
1319 |
Contains Duplicate II |
JavaScript |
Easy |
1320 |
Contains Duplicate |
JavaScript |
Easy |
1321 |
Combination Sum III |
|
Medium |
1322 |
Product Equal B |
|
Hard |
1323 |
Fetch supplies |
|
Medium |
1324 |
Count Primes |
JavaScript |
Easy |
1325 |
Bitwise AND of Numbers Range |
|
Medium |
1326 |
Boarder Sort |
|
Medium |
1327 |
delete string |
|
Easy |
1328 |
Double Change |
|
Easy |
1329 |
Sequence maintenance |
|
Hard |
1330 |
zero matrix |
|
Hard |
1331 |
English Software |
|
Easy |
1332 |
Number of 1 Bits |
JavaScript |
Easy |
1333 |
Reverse Bits |
JavaScript Python |
Easy |
1334 |
Rotate Array |
JavaScript |
Easy |
1335 |
Repeated DNA Sequences |
JavaScript |
Medium |
1336 |
Invite your friend |
|
Medium |
1337 |
Maximum Possible Value |
|
Medium |
1338 |
Parking Dilemma |
|
Easy |
1339 |
Maximum Range |
|
Hard |
1340 |
add character |
|
Easy |
1341 |
Combine New Numbers |
|
Medium |
1342 |
substitute string |
|
Medium |
1343 |
Sum of Two Strings |
Python |
Easy |
1344 |
Counter Diagonal Sort |
|
Medium |
1345 |
Robot Encircular |
|
Medium |
1346 |
Dungeon Game |
|
Hard |
1347 |
Factorial Trailing Zeroes |
JavaScript |
Easy |
1348 |
Excel Sheet Column Number |
JavaScript |
Easy |
1350 |
Excel Sheet Column Title |
JavaScript |
Easy |
1351 |
Fraction to Recurring Decimal |
|
Medium |
1352 |
Compare Version Numbers |
JavaScript |
Medium |
1353 |
Sum Root to Leaf Numbers |
JavaScript |
Medium |
1354 |
Pascal's Triangle II |
JavaScript |
Easy |
1355 |
Pascal's Triangle |
JavaScript |
Easy |
1356 |
Maximum Points Set |
|
Medium |
1357 |
Path Sum II |
JavaScript |
Medium |
1358 |
Path Sum |
JavaScript |
Easy |
1359 |
Convert Sorted Array to Binary Search Tree |
JavaScript |
Easy |
1360 |
Symmetric Tree |
JavaScript |
Easy |
1361 |
Text Justification |
|
Hard |
1362 |
Substring with Concatenation of All Words |
|
Hard |
1363 |
ZigZag Conversion |
|
Medium |
1364 |
the minium distance |
|
Medium |
1365 |
Minimum Cycle Section |
|
Hard |
1366 |
Directed Graph Loop |
|
Medium |
1367 |
Police Distance |
|
Medium |
1368 |
Same Number |
JavaScript |
Easy |
1369 |
Most Common Word |
|
Easy |
1370 |
Race Car |
|
Hard |
1371 |
Linked List Components |
JavaScript |
Medium |
1372 |
Ambiguous Coordinates |
|
Medium |
1373 |
Movies on Flight |
|
Medium |
1374 |
Shortest Distance in 3D Space |
|
Medium |
1375 |
Substring With At Least K Distinct Characters |
|
Medium |
1376 |
Equivalent Strings |
|
Medium |
1377 |
Find Substring |
|
Medium |
1378 |
Minimum String Array Coverage |
|
Medium |
1379 |
The Longest Scene |
|
Hard |
1380 |
Log Sorting |
|
Easy |
1381 |
Maximum Line Coverage |
|
Hard |
1382 |
High Capacity Backpack |
|
Medium |
1383 |
Subtree Count |
|
Hard |
1384 |
Segment Stones Merge |
|
Super |
1385 |
Lucky Number Eight |
|
Easy |
1386 |
Cable Car Ride |
|
Easy |
1387 |
Binary Trees With Factors |
|
Medium |
1388 |
Card Flipping Game |
|
Medium |
1389 |
Shortest Distance to a Character |
|
Easy |
1390 |
Short Encoding of Words |
|
Medium |
1391 |
Making A Large Island |
|
Hard |
1392 |
Most Profit Assigning Work |
|
Medium |
1393 |
Friends Of Appropriate Ages |
|
Medium |
1394 |
Goat Latin |
JavaScript |
Easy |
1395 |
The Barycentre Of The Trees |
|
Hard |
1396 |
Set Union |
|
Medium |
1397 |
Digital Coverage |
|
Medium |
1398 |
K Decimal Addition |
|
Easy |
1399 |
Take Coins |
|
Medium |
1400 |
Fermat Point Of Graphs |
|
Hard |
1401 |
Twitch Words |
JavaScript |
Easy |
1402 |
Recommend Friends |
|
Medium |
1403 |
Maximum Product Path |
|
Medium |
1408 |
Gas Station II |
|
Hard |
1409 |
Matrix Finding Number |
|
Medium |
1410 |
Matrix Water Injection |
|
Easy |
1411 |
Edit Distance - Replace Edition |
|
Medium |
1412 |
Pick Three Numbers |
|
Medium |
1413 |
Tree |
|
Medium |
1414 |
Eat The Beans |
|
Hard |
1415 |
Residual Product |
|
Easy |
1416 |
The Previous Number |
|
Medium |
1417 |
Weighing Problem |
|
Easy |
1418 |
Path With Maximum Minimum Value |
|
Medium |
1420 |
Minimum Window Substring II |
|
Medium |
1421 |
Matrix Game |
|
Easy |
1422 |
Shortest Path Visiting All Nodes |
|
Hard |
1423 |
Hand of Straights |
|
Medium |
1424 |
Longest Mountain in Array |
JavaScript |
Medium |
1425 |
Backspace String Compare |
JavaScript |
Easy |
1426 |
Robot jumping |
|
Hard |
1427 |
Split Array into Fibonacci Sequence |
|
Medium |
1428 |
Keys and Rooms |
|
Medium |
1430 |
Similar String Groups |
|
Hard |
1431 |
Push Dominoes |
|
Medium |
1432 |
New 21 Game |
|
Medium |
1433 |
Image Overlap |
|
Medium |
1434 |
Sum of Distances in Tree |
|
Hard |
1435 |
Find And Replace in String |
|
Medium |
1436 |
Flipping an Image |
|
Easy |
1437 |
Masking Personal Information |
|
Medium |
1438 |
Positions of Large Groups |
JavaScript |
Easy |
1439 |
Consecutive Numbers Sum |
|
Medium |
1440 |
Unique Letter String |
|
Hard |
1441 |
Four Numbers Multiply Problem |
|
Hard |
1442 |
Order Problem |
|
Medium |
1443 |
Longest AB Substring |
|
Easy |
1444 |
Dyeing Problem |
|
Medium |
1445 |
Delete Characters |
|
Easy |
1446 |
01 Matrix Walking Problem |
|
Medium |
1447 |
Calculation The Sum Of Path |
|
Medium |
1448 |
Card Game |
|
Medium |
1449 |
Loud and Rich |
|
Medium |
1450 |
Rectangle Area II |
|
Hard |
1451 |
Maximize Distance to Closest Person |
JavaScript |
Easy |
1452 |
Shifting Letters |
|
Medium |
1453 |
Minimum Amount |
|
Medium |
1454 |
Word Frequency Count |
|
Medium |
1455 |
Valid Array |
|
Easy |
1456 |
Word Synthesis Problem |
|
Hard |
1457 |
Search Subarray |
|
Medium |
1458 |
Minimum Submatrix |
|
Medium |
1459 |
Judge the last number |
|
Easy |
1463 |
Paper Review |
|
Medium |
1464 |
The K-th Combination |
|
Hard |
1465 |
Order Of Tasks |
|
Medium |
1466 |
Best Shopping Plan |
|
Medium |
1467 |
Ask For Cooling Time |
|
Medium |
1468 |
Two Numbers That Are Not Repeated |
|
Hard |
1469 |
Longest Path On The Tree |
|
Medium |
1470 |
The Game Of Take Numbers |
|
Medium |
1471 |
Set Operation |
|
Easy |
1472 |
Twins Strings |
|
Easy |
1473 |
Find The Sum Of The Array |
|
Medium |
1474 |
Shortest Phrase |
|
Medium |
1475 |
Minimum Legal Bracket Sequence |
|
Hard |
1476 |
Peak Index in a Mountain Array |
|
Easy |
1477 |
Car Fleet |
JavaScript |
Medium |
1478 |
Closest Target Value |
|
Easy |
1479 |
Can Reach The Endpoint |
|
Easy |
1480 |
Dot Product |
|
Easy |
1481 |
Unique Substring |
|
Medium |
1482 |
Minimum Sum Path |
|
Medium |
1483 |
Maximum Average Score |
JavaScript |
Easy |
1484 |
The Most Frequent word |
|
Medium |
1485 |
Holy Grail spell |
Python |
Easy |
1486 |
Function Runtime |
|
Easy |
1487 |
Judging Triangle |
|
Medium |
1488 |
Longest Sequence |
|
Hard |
1489 |
The Largest Sum Of The Matrix Boundary Elements |
|
Medium |
1490 |
K-Similar Strings |
|
Hard |
1491 |
Score of Parentheses |
|
Medium |
1492 |
Koko Eating Bananas |
JavaScript |
Medium |
1493 |
Walking Robot Simulation |
|
Easy |
1494 |
Length of Longest Fibonacci Subsequence |
|
Medium |
1495 |
Leaf-Similar Trees |
JavaScript |
Easy |
1496 |
Implement Rand10() Using Rand7() |
|
Medium |
1497 |
Minimum Number of Refueling Stops |
|
Hard |
1498 |
Advantage Shuffle |
|
Medium |
1499 |
Reordered Power of 2 |
JavaScript |
Medium |
1500 |
Binary Gap |
|
Easy |
1501 |
Transpose Matrix |
|
Easy |
1502 |
Prime Palindrome |
|
Medium |
1503 |
Give change |
|
Easy |
1504 |
Shortest Path to Get All Keys |
|
Hard |
1505 |
Find the Number |
Python |
Easy |
1506 |
All Nodes Distance K in Binary Tree |
Python |
Medium |
1507 |
Shortest Subarray with Sum at Least K |
|
Hard |
1508 |
Score After Flipping Matrix |
JavaScript |
Medium |
1509 |
Lemonade Change |
JavaScript |
Easy |
1510 |
Buddy Strings |
JavaScript |
Easy |
1511 |
Mirror Reflection |
|
Medium |
1512 |
Minimum Cost to Hire K Workers |
|
Hard |
1513 |
Exam Room |
|
Medium |
1514 |
Robot Room Cleaner |
|
Hard |
1516 |
Xor Sum |
|
Super |
1517 |
Largest subarray |
JavaScript |
Easy |
1518 |
Watering Flowers |
|
Medium |
1519 |
Time magic |
Python |
Easy |
1521 |
Unique Twitter User Id Set |
|
Easy |
1522 |
Search in a Sorted Array of Unknown Size |
|
Medium |
1523 |
Partitioning Array |
|
Easy |
1524 |
Search in a Binary Search Tree |
JavaScript |
Easy |
1525 |
N-ary Tree Postorder Traversal |
Python |
Easy |
1526 |
N-ary Tree Preorder Traversal |
Python |
Easy |
1527 |
Majsoul on ! |
|
Medium |
1528 |
number schemes |
|
Hard |
1529 |
Triplet Subarray With Absolute Diff Less Than or Equal to Limit |
|
Hard |
1530 |
Encode N-ary Tree to Binary Tree |
|
Hard |
1531 |
Automatic Proofreading Program |
|
Medium |
1532 |
Serialize and Deserialize N-ary Tree |
|
Hard |
1533 |
N-ary Tree Level Order Traversal |
|
Easy |
1534 |
Convert Binary Search Tree to Sorted Doubly Linked List |
|
Medium |
1535 |
To Lower Case |
JavaScript |
Easy |
1536 |
Find First and Last Position of Element in Sorted Array |
JavaScript |
Medium |
1537 |
Swap Zero-One |
|
Medium |
1538 |
Card Game II |
|
Medium |
1539 |
Flipped the Pixel |
|
Medium |
1540 |
Can Convert |
|
Easy |
1541 |
Put Box |
|
Hard |
1542 |
NextTime Norepeat |
|
Medium |
1543 |
Unique Path IV |
|
Medium |
1544 |
Magic Square |
|
Hard |
1545 |
Last Closest Time |
|
Medium |
1546 |
Coin Problem |
|
Easy |
1552 |
Parking Problem |
|
Medium |
1553 |
Climbing Stairs III |
|
Medium |
1554 |
LastTime Norepeat |
|
Medium |
1555 |
Flower Problem |
|
Hard |
1556 |
Guess Game |
|
Hard |
1557 |
Array Maximum Value |
|
Hard |
1558 |
Interlaced Positive And Negative Numbers |
|
Hard |
1559 |
Take the element and query the sum |
|
Easy |
1560 |
MinimumString |
|
Medium |
1561 |
BST Node Distance |
|
Medium |
1562 |
Number of restaurants |
|
Medium |
1563 |
Shortest path to the destination |
|
Medium |
1564 |
Interval Search |
|
Easy |
1565 |
Modern Ludo I |
|
Easy |
1566 |
Minimum Difference |
|
Hard |
1567 |
Maximum Can Exchanged Subarray |
|
Medium |
1568 |
Poison Test |
|
Medium |
1569 |
Social Network |
|
Medium |
1570 |
Binary Stream |
|
Easy |
1571 |
Top K GPA |
|
Medium |
1572 |
Asking For The Longest 01 Substring |
|
Medium |
1573 |
Legal String |
|
Medium |
1574 |
Music Playlist |
|
Hard |
1575 |
Spring Tour |
|
Easy |
1576 |
Optimal Match |
|
Hard |
1577 |
Sum of leaf nodes |
|
Medium |
1578 |
Number of A |
JavaScript |
Easy |
1579 |
Alphabetic string calculation |
|
Medium |
1580 |
Transition String |
|
Medium |
1581 |
Longest Subsequence |
|
Medium |
1582 |
Minimum Path Sum II |
|
Medium |
1583 |
Maximum Number Sum |
|
Medium |
1584 |
Number Of Xor Values |
|
Medium |
1585 |
Moving Stones |
|
Easy |
1586 |
Minimum Number Of Keystrokes |
|
Medium |
1587 |
String Segmentation |
|
Medium |
1588 |
All Possible Full Binary Trees |
|
Medium |
1589 |
Groups of Special-Equivalent Strings |
|
Easy |
1590 |
Surface Area of 3D Shapes |
|
Easy |
1591 |
Sum of Subsequence Widths |
|
Hard |
1592 |
Find and Replace Pattern |
|
Medium |
1593 |
Construct Binary Tree from Preorder and Postorder Traversal |
JavaScript |
Medium |
1594 |
Fair Candy Swap |
JavaScript |
Easy |
1596 |
Possible Bipartition |
|
Medium |
1597 |
Spiral Matrix III |
|
Medium |
1598 |
Uncommon Words from Two Sentences |
JavaScript |
Easy |
1599 |
Projection Area of 3D Shapes |
|
Easy |
1600 |
Reachable Nodes In Subdivided Graph |
|
Hard |
1601 |
Boats to Save People |
JavaScript |
Medium |
1602 |
Decoded String at Index |
|
Medium |
1604 |
Maximum Sum of Two Numbers |
|
Medium |
1606 |
Strange Sort |
|
Medium |
1607 |
Profitable Schemes |
|
Hard |
1608 |
Nth Magical Number |
|
Hard |
1609 |
Middle of the Linked List |
JavaScript |
Easy |
1610 |
Find the numbers |
|
Medium |
1611 |
Shortest subarray |
|
Medium |
1612 |
Smallest Path |
|
Medium |
1613 |
Highest frequency IP |
|
Naive |
1614 |
Highest growth stock |
|
Easy |
1615 |
The result of investment |
|
Easy |
1616 |
Shortest subarray II |
|
Hard |
1617 |
Array Maximum Difference |
|
Easy |
1618 |
Processing Form |
|
Medium |
1619 |
Candy II |
|
Medium |
1620 |
Collecting Coins |
|
Super |
1621 |
Cut Connection |
|
Easy |
1623 |
Minimal Distance In The Array |
|
Easy |
1624 |
Max Distance |
|
Hard |
1625 |
Words Compression |
|
Hard |
1626 |
Salary Adjustment |
|
Medium |
1627 |
Word Segmentation |
|
Medium |
1628 |
Driving problem |
|
Medium |
1629 |
Find the nearest store |
|
Medium |
1630 |
Interesting String |
|
Medium |
1631 |
Interesting Subarray |
|
Medium |
1632 |
Count email groups |
|
Easy |
1633 |
Strings That Satisfies The Condition |
|
Easy |
1634 |
Secret Word |
|
Medium |
1635 |
Max Pair |
|
Medium |
1636 |
Aerial Movie |
|
Medium |
1637 |
Tree problem |
|
Medium |
1638 |
Least Substring |
|
Easy |
1639 |
K-Substring with K different characters |
|
Medium |
1640 |
Duplicates Digits |
|
Hard |
1641 |
Max Remove Order |
|
Medium |
1642 |
Query String |
|
Medium |
1643 |
Pick Fruits |
|
Medium |
1644 |
Plane Maximum Rectangle |
|
Medium |
1645 |
Least Subsequences |
|
Easy |
1646 |
CheckWords |
|
Medium |
1647 |
Path Search |
|
Medium |
1648 |
max substring |
|
Hard |
1649 |
Super Lollipop |
|
Easy |
1656 |
Legal Number Statistics |
JavaScript |
Easy |
1657 |
Operation Time |
|
Easy |
1659 |
Legal Number Statistics II |
|
Easy |
1665 |
Calculate number |
JavaScript |
Easy |
1669 |
Build a temple |
|
Medium |
1685 |
The mazeIV |
|
Medium |
1691 |
Best Time to Buy and Sell Stock V |
|
Medium |
1698 |
Delete Columns to Make Sorted |
|
Easy |
1699 |
Find the Shortest Superstring |
|
Hard |
1700 |
DI String Match |
|
Easy |
1701 |
Valid Mountain Array |
|
Easy |
1702 |
Distinct Subsequences II |
JavaScript |
Hard |
1703 |
Minimum Area Rectangle |
|
Medium |
1704 |
Range Sum of BST |
JavaScript |
Medium |
1705 |
Compare Strings II |
|
Easy |
1706 |
Stamping The Sequence |
|
Hard |
1707 |
Knight Dialer |
|
Medium |
1708 |
Shortest Bridge |
|
Medium |
1709 |
Number of Recent Calls |
|
Easy |
1710 |
Beautiful Array |
|
Medium |
1711 |
Minimum Falling Path Sum |
JavaScript |
Medium |
1712 |
Binary Subarrays With Sum |
|
Medium |
1713 |
Unique Email Addresses |
|
Easy |
1714 |
Minimize Malware Spread II |
|
Hard |
1715 |
Three Equal Parts |
|
Hard |
1716 |
Flip String to Monotone Increasing |
JavaScript |
Medium |
1718 |
Minimize Malware Spread |
|
Hard |
1719 |
3Sum With Multiplicity |
JavaScript |
Medium |
1721 |
Minimum Add to Make Parentheses Valid |
JavaScript |
Medium |
1722 |
Number of Music Playlists |
|
Hard |
1723 |
Shortest Path in a Grid with Obstacles Elimination |
|
Medium |
1724 |
Maximum Sum Circular Subarray |
JavaScript |
Medium |
1725 |
Reverse Only Letters |
|
Easy |
1726 |
Word Subsets |
|
Medium |
1727 |
Partition Array into Disjoint Intervals |
JavaScript |
Medium |
1728 |
X of a Kind in a Deck of Cards |
Python |
Easy |
1729 |
Cat and Mouse |
|
Hard |
1730 |
Spreadsheet Notation Conversion |
|
Easy |
1731 |
Smallest Range II |
|
Medium |
1732 |
Snakes and Ladders |
|
Medium |
1733 |
Smallest Range I |
|
Easy |
1734 |
Sum of Subarray Minimums |
|
Medium |
1736 |
Throw garbage |
|
Medium |
1737 |
Fruit Into Baskets |
|
Medium |
1738 |
Valid Permutations for DI Sequence |
|
Hard |
1739 |
Numbers At Most N Given Digit Set |
|
Medium |
1740 |
Online Stock Span |
|
Medium |
1741 |
RLE Iterator |
|
Medium |
1742 |
Orderly Queue |
|
Hard |
1743 |
Bitwise ORs of Subarrays |
|
Medium |
1744 |
Increasing Order Search Tree |
JavaScript |
Easy |
1745 |
Monotonic Array |
JavaScript |
Easy |
1746 |
Minimum Distance Between BST Nodes |
JavaScript |
Easy |
1747 |
Robot Return to Origin |
|
Easy |
1756 |
Buy beverage |
|
Medium |
1761 |
Digital Huarong Road |
|
Hard |
1767 |
Minimum Tree Coverage |
|
Hard |
1772 |
Number of collections |
|
Super |
1778 |
Odd Even Jump |
|
Hard |
1779 |
Shortest Duplicate Subarray |
JavaScript |
Easy |
1780 |
The Candidate With the Most Votes |
|
Medium |
1781 |
Reverse ASCII Encoded Strings |
|
Easy |
1782 |
No Pairs Allowed |
|
Medium |
1783 |
Binary Tree Postorder Traversal-null |
JavaScript |
Easy |
1784 |
Decrease To Be Palindrome |
|
Easy |
1785 |
Bank System |
|
Medium |
1786 |
Pub Sub Pattern |
|
Easy |
1787 |
Google Suggestion (Map Reduce) |
|
Medium |
1788 |
Ascending Binary Sorting |
|
Medium |
1789 |
Distinguish Username |
|
Easy |
1790 |
Rotate String II |
|
Easy |
1791 |
Simple queries |
|
Medium |
1792 |
Cut the sticks |
|
Easy |
1793 |
Balanced Sales Array |
|
Easy |
1794 |
Count Duplicates |
|
Easy |
1795 |
Is Possible |
|
Medium |
1796 |
K-Difference |
|
Medium |
1797 |
optimalUtilization |
|
Easy |
1798 |
Minimum Cost to Merge Stones |
|
Hard |
1799 |
Sequence summation |
|
Easy |
1800 |
Float Combination Sum |
|
Medium |
1801 |
the sum of legal set |
|
Easy |
1802 |
Grid Game |
|
Medium |
1803 |
Rotate beam |
|
Medium |
1804 |
Find The Rank |
|
Easy |
1807 |
Fibonacci easy |
Python |
Easy |
1808 |
Minimum Domino Rotations For Equal Row |
|
Medium |
1809 |
Largest Continguous Subarray |
|
Medium |
1811 |
Find Maximum Gold |
|
Medium |
1812 |
Rotation Number |
|
Easy |
1814 |
Sum of all Subarrays |
Python |
Easy |
1815 |
Threhold Alerts |
|
Easy |
1816 |
Find the Smallest Divisor Given a Threshold |
|
Medium |
1817 |
Divide Chocolate |
|
Hard |
1819 |
Longest Semi Alternating Substring |
|
Easy |
1820 |
Find Letter |
|
Easy |
1821 |
Min Deletions To Obtain String in Right Format |
|
Easy |
1822 |
Minimum Moves |
|
Easy |
1823 |
Longest Prefix of Array |
|
Easy |
1824 |
Most Frequent Substring |
|
Medium |
1825 |
Number Change |
|
Medium |
1827 |
Number of Ways to Stay in the Same Place After Some Steps II |
|
Hard |
1828 |
Lake Escape |
|
Hard |
1831 |
Array Summarization |
|
Easy |
1832 |
Minimum Step |
|
Medium |
1833 |
pen box |
|
Medium |
1834 |
Grouping Options |
|
Hard |
1835 |
Number of Ways to Stay in the Same Place After Some Steps I |
|
Easy |
1836 |
Reaching Point |
|
Medium |
1840 |
Matrix restoration |
|
Medium |
1844 |
subarray sum equals k II |
|
Medium |
1846 |
Reaching Point II |
|
Medium |
1848 |
Word Search III |
|
Hard |
1849 |
Grumpy Bookstore Owner |
|
Medium |
1850 |
Pick Apples |
|
Medium |
1851 |
Buy Passes |
|
Medium |
1852 |
Final Discounted Price |
|
Medium |
1853 |
Efficient Job Processing Service |
|
Hard |
1854 |
Partition Array III |
|
Easy |
1855 |
Reach Destination |
|
Hard |
1856 |
Sub-palindrome |
|
Easy |
1857 |
Find Friend Circle Number |
|
Medium |
1858 |
Set of boxes |
|
Medium |
1859 |
Minimum Amplitude |
|
Easy |
1860 |
the Number of 0-submatrix |
|
Medium |
1861 |
Rat Jump |
|
Hard |
1862 |
Time to Flower Tree |
|
Medium |
1867 |
Most Frequent Word II |
|
Easy |
1868 |
Find the Number of “Balance” in the String |
|
Medium |
1869 |
Count Square Submatrices with All Ones |
|
Medium |
1870 |
number of substrings with all zeroes |
|
Medium |
1871 |
Maximum moment |
|
Easy |
1872 |
Minimum Cost to Connect Sticks |
|
Medium |
1874 |
Kth Smallest Element in a Specific Array |
|
Medium |
1876 |
Alien Dictionary(easy) |
|
Easy |
1877 |
longest super sequence |
|
Medium |
1878 |
Rotated Nums |
|
Easy |
1879 |
Two Sum VII |
|
Hard |
1880 |
Largest Number X Which Occurs X Times |
|
Easy |
1881 |
Aircraft seat |
|
Easy |
1882 |
Fair Indexes |
|
Medium |
1883 |
Top K Frequently Mentioned Keywords |
|
Medium |
1884 |
Take Away The Bottle |
|
Hard |
1885 |
A Strange Sorting Problem |
|
Hard |
1886 |
Moving Target |
|
Easy |
1887 |
Stretch Word |
|
Easy |
1888 |
Shortest Path in Matrix |
|
Medium |
1889 |
Interval Merge |
|
Medium |
1890 |
Form Minimum Number |
|
Medium |
1891 |
Travel Plan |
|
Medium |
1892 |
Mine-sweeping |
|
Medium |
1893 |
the Valid String |
|
Medium |
1894 |
Ad Click Analysis |
|
Easy |
1895 |
Arrange interview city |
|
Easy |
1896 |
Pick Carrots |
|
Easy |
1897 |
Meeting Room III |
|
Medium |
1899 |
Fetch supplies II |
|
Medium |
1900 |
Gene Similarity |
|
Hard |
1901 |
Squares of a Sorted Array |
|
Easy |
1902 |
Find Google |
|
Easy |
1903 |
Department Statistics |
|
Easy |
1904 |
Put small balls |
|
Hard |
1905 |
Character deletion |
|
Easy |