347 |
Top K Frequent Elements |
JavaScript |
Explaination |
Medium |
345 |
Reverse Vowels of a String |
JavaScript |
Explaination |
Easy |
344 |
Reverse String |
JavaScript |
Explaination |
Easy |
343 |
Integer Break |
JavaScript |
Explaination |
Medium |
342 |
Power of Four |
JavaScript |
Explaination |
Easy |
341 |
Flatten Nested List Iterator |
JavaScript |
Explaination |
Medium |
339 |
Nested List Weight Sum |
📘 |
|
Easy |
338 |
Counting Bits |
JavaScript |
Explaination |
Medium |
337 |
House Robber III |
JavaScript |
Explaination |
Medium |
336 |
Palindrome Pairs |
|
|
|
335 |
Self Crossing |
JavaScript |
Explaination |
Medium |
334 |
Increasing Triplet Subsequence |
JavaScript |
Explaination |
Medium |
333 |
Largest BST Subtree |
📘 |
|
Medium |
332 |
Reconstruct Itinerary |
|
|
|
331 |
Verify Preorder Serialization of a Binary Tree |
|
|
|
330 |
Patching Array |
JavaScript |
Explaination |
Medium |
329 |
Longest Increasing Path in a Matrix |
|
|
|
328 |
Odd Even Linked List |
|
|
|
327 |
Count of Range Sum |
|
|
|
326 |
Power of Three |
JavaScript |
Explaination |
Easy |
325 |
Maximum Size Subarray Sum Equals k |
📘 |
|
Easy |
324 |
Wiggle Sort II |
|
|
|
323 |
Number of Connected Components in an Undirected Graph |
📘 |
|
Medium |
322 |
Coin Change |
JavaScript |
Explaination |
Medium |
321 |
Create Maximum Number |
|
|
|
320 |
Generalized Abbreviation |
📘 |
|
Medium |
319 |
Bulb Switcher |
JavaScript |
Explaination |
Medium |
318 |
Maximum Product of Word Lengths |
|
|
|
317 |
Shortest Distance from All Buildings |
📘 |
|
Hard |
316 |
Remove Duplicate Letters |
|
|
|
315 |
Count of Smaller Numbers After Self |
JavaScript |
Explaination |
Hard |
314 |
Binary Tree Vertical Order Traversal |
📘 |
|
Medium |
313 |
Super Ugly Number |
JavaScript |
Explaination |
Medium |
312 |
Burst Balloons |
|
|
|
311 |
Sparse Matrix Multiplication |
📘 |
|
Medium |
310 |
Minimum Height Trees |
|
|
|
309 |
Best Time to Buy and Sell Stock with Cooldown |
|
|
|
308 |
Range Sum Query 2D - Mutable |
📘 |
|
Hard |
307 |
Range Sum Query - Mutable |
JavaScript |
Explaination |
Medium |
306 |
Additive Number |
JavaScript |
Explaination |
Medium |
305 |
Number of Islands II |
📘 |
|
|
304 |
Range Sum Query 2D - Immutable |
JavaScript |
Explaination |
Medium |
303 |
Range Sum Query - Immutable |
JavaScript |
Explaination |
Easy |
302 |
Smallest Rectangle Enclosing Black Pixels |
📘 |
|
|
301 |
Remove Invalid Parentheses |
|
|
|
300 |
Longest Increasing Subsequence |
JavaScript |
Explaination |
Medium |
299 |
Bulls and Cows |
JavaScript |
Explaination |
Easy |
298 |
Binary Tree Longest Consecutive Sequence |
📘 |
|
|
297 |
Serialize and Deserialize Binary Tree |
|
|
|
296 |
Best Meeting Point |
📘 |
|
|
295 |
Find Median from Data Stream |
JavaScript |
Explaination |
Hard |
294 |
Flip Game II |
📘 |
|
|
293 |
Flip Game |
📘 |
|
|
292 |
Nim Game |
JavaScript |
Explaination |
Easy |
291 |
Word Pattern II |
📘 |
|
|
290 |
Word Pattern |
JavaScript |
Explaination |
Easy |
289 |
Game of Life |
JavaScript |
Explaination |
Medium |
288 |
Unique Word Abbreviation |
📘 |
|
|
287 |
Find the Duplicate Number |
JavaScript |
Explaination |
Hard |
286 |
Walls and Gates |
📘 |
|
|
285 |
Inorder Successor in BST |
📘 |
|
|
284 |
Peeking Iterator |
Not Support JavaScript |
|
|
283 |
Move Zeroes |
JavaScript |
Explaination |
Easy |
282 |
Expression Add Operators |
|
|
|
281 |
Zigzag Iterator |
📘 |
|
|
280 |
Wiggle Sort |
📘 |
|
|
279 |
Perfect Squares |
JavaScript |
Explaination |
Medium |
278 |
First Bad Version |
JavaScript |
Explaination |
Easy |
277 |
Find the Celebrity |
📘 |
|
|
276 |
Paint Fence |
📘 |
|
|
275 |
H-Index II |
JavaScript |
Explaination |
Medium |
274 |
H-Index |
JavaScript |
Explaination |
Medium |
273 |
Integer to English Words |
|
|
|
272 |
Closest Binary Search Tree Value II |
📘 |
|
|
271 |
Encode and Decode Strings |
📘 |
|
|
270 |
Closest Binary Search Tree Value |
📘 |
|
|
269 |
Alien Dictionary |
📘 |
|
|
268 |
Missing Number |
JavaScript |
Explaination |
Medium |
267 |
Palindrome Permutation II |
📘 |
|
|
266 |
Palindrome Permutation |
📘 |
|
|
265 |
Paint House II |
📘 |
|
|
264 |
Ugly Number II |
JavaScript |
Explaination |
Medium |
263 |
Ugly Number |
JavaScript |
Explaination |
Easy |
261 |
Graph Valid Tree |
📘 |
|
|
260 |
Single Number III |
JavaScript |
|
Medium |
259 |
3Sum Smaller |
📘 |
|
|
258 |
Add Digits |
JavaScript |
Explaination |
Easy |
257 |
Binary Tree Paths |
JavaScript |
Explaination |
Easy |
256 |
Paint House) |
📘 |
|
|
255 |
Verify Preorder Sequence in Binary Search Tree |
📘 |
|
|
254 |
Factor Combinations |
📘 |
|
|
253 |
Meeting Rooms II |
📘 |
|
|
252 |
Meeting Rooms |
📘 |
|
|
251 |
Flatten 2D Vector |
📘 |
|
|
250 |
Count Univalue Subtrees |
📘 |
|
|
249 |
Group Shifted Strings |
📘 |
|
|
248 |
Strobogrammatic Number III |
📘 |
|
|
247 |
Strobogrammatic Number II |
📘 |
|
|
246 |
Strobogrammatic Number |
📘 |
|
|
245 |
Shortest Word Distance III |
📘 |
|
|
244 |
Shortest Word Distance II |
📘 |
|
|
243 |
Shortest Word Distance |
📘 |
|
|
242 |
Valid Anagram |
JavaScript |
Explaination |
Easy |
241 |
Different Ways to Add Parentheses |
|
|
|
240 |
Search a 2D Matrix II |
JavaScript |
Explaination |
Medium |
239 |
Sliding Window Maximum |
|
|
|
238 |
Product of Array Except Self |
JavaScript |
|
Medium |
237 |
Delete Node in a Linked List |
JavaScript |
Explaination |
Easy |
236 |
Lowest Common Ancestor of a Binary Tree |
|
|
|
235 |
Lowest Common Ancestor of a Binary Search Tree |
|
|
|
234 |
Palindrome Linked List |
JavaScript |
Explaination |
Easy |
233 |
Number of Digit One |
JavaScript |
|
Hard |
232 |
Implement Queue using Stacks |
JavaScript |
Explaination |
Easy |
231 |
Power of Two |
JavaScript |
Explaination |
Easy |
230 |
Kth Smallest Element in a BST |
|
|
|
229 |
Majority Element II |
JavaScript |
|
Medium |
228 |
Summary Ranges |
JavaScript |
Explaination |
Medium |
227 |
Basic Calculator II |
|
|
|
226 |
Invert Binary Tree |
JavaScript |
Explaination |
Easy |
225 |
Implement Stack using Queues |
JavaScript |
Explaination |
Easy |
224 |
Basic Calculator |
|
|
|
223 |
Rectangle Area |
JavaScript |
Explaination |
Easy |
222 |
Count Complete Tree Nodes |
|
|
|
221 |
Maximal Square |
JavaScript |
|
Medium |
220 |
Contains Duplicate III |
JavaScript |
|
Medium |
219 |
Contains Duplicate II |
JavaScript |
|
Easy |
218 |
|
|
|
|
217 |
Contains Duplicate |
JavaScript |
|
Easy |
216 |
Combination Sum III |
JavaScript |
|
Medium |
215 |
Kth Largest Element in an Array |
JavaScript |
Explaination |
Medium |
214 |
Shortest Palindrome |
JavaScript |
Explaination |
Hard |
213 |
House Robber II |
JavaScript |
|
Medium |
212 |
Word Search II |
|
|
|
211 |
Add and Search Word - Data structure design |
|
|
|
210 |
Course Schedule II |
|
|
|
209 |
Minimum Size Subarray Sum |
JavaScript |
|
Medium |
208 |
Implement Trie (Prefix Tree) |
|
|
|
207 |
Course Schedule |
|
|
|
206 |
Reverse Linked List |
JavaScript |
|
Easy |
205 |
Isomorphic Strings |
JavaScript |
Explaination |
Easy |
204 |
Count Primes |
JavaScript |
Explaination |
Easy |
203 |
Remove Linked List Elements |
JavaScript |
Explaination |
Easy |
202 |
Happy Number |
JavaScript |
Explaination |
Easy |
201 |
Bitwise AND of Numbers Range |
JavaScript |
|
Medium |
200 |
Number of Islands |
JavaScript |
Explaination |
Medium |
199 |
Binary Tree Right Side View |
JavaScript |
|
Medium |
198 |
House Robber |
JavaScript |
|
Easy |
191 |
Number of 1 Bits |
JavaScript |
|
Easy |
190 |
Reverse Bits |
JavaScript |
Explaination |
Easy |
189 |
Rotate Array |
JavaScript |
Explaination |
Easy |
188 |
Best Time to Buy and Sell Stock IV |
|
|
|
187 |
Repeated DNA Sequences |
JavaScript |
Explaination |
Medium |
186 |
Reverse Words in a String II |
|
|
|
179 |
Largest Number |
JavaScript |
Explaination |
Medium |
174 |
Dungeon Game |
|
|
|
173 |
Binary Search Tree Iterator |
|
|
|
172 |
Factorial Trailing Zeroes |
JavaScript |
Explaination |
Easy |
171 |
Excel Sheet Column Number |
JavaScript |
Explaination |
Easy |
170 |
Two Sum III - Data structure design |
|
|
|
169 |
Majority Element |
JavaScript |
Explaination |
Easy |
168 |
Excel Sheet Column Title |
JavaScript |
Explaination |
Easy |
167 |
Two Sum II - Input array is sorted |
|
|
|
166 |
Fraction to Recurring Decimal |
JavaScript |
Explaination |
Medium |
165 |
Compare Version Numbers |
JavaScript |
Explaination |
Easy |
164 |
Maximum Gap |
JavaScript |
Explaination |
Hard |
163 |
Missing Ranges |
|
|
|
162 |
Find Peak Element |
JavaScript |
Explaination |
Medium |
161 |
One Edit Distance |
|
|
|
160 |
Intersection of Two Linked Lists |
|
|
|
159 |
Longest Substring with At Most Two Distinct Characters |
|
|
|
158 |
Read N Characters Given Read4 II - Call multiple times |
|
|
|
157 |
Read N Characters Given Read4 |
|
|
|
156 |
Binary Tree Upside Down |
|
|
|
155 |
Min Stack |
Not Support JavaScript |
|
|
154 |
Find Minimum in Rotated Sorted Array II |
JavaScript |
|
Hard |
153 |
Find Minimum in Rotated Sorted Array |
JavaScript |
|
Medium |
152 |
Maximum Product Subarray |
JavaScript |
|
Medium |
151 |
Reverse Words in a String |
JavaScript |
Explaination |
Medium |
150 |
Evaluate Reverse Polish Notation |
|
|
|
149 |
Max Points on a Line |
|
|
|
148 |
Sort List |
JavaScript |
Explaination |
Medium |
147 |
Insertion Sort List |
JavaScript |
|
Medium |
146 |
LRU Cache |
JavaScript |
Explaination |
Hard |
145 |
Binary Tree Postorder Traversal |
JavaScript |
|
Hard |
144 |
Binary Tree Preorder Traversal |
JavaScript |
|
Medium |
141 |
Linked List Cycle |
JavaScript |
Explaination |
Easy |
137 |
Single Number II |
JavaScript |
|
Medium |
136 |
Single Number |
JavaScript |
|
Medium |
132 |
Palindrome Partitioning II |
JavaScript |
Explaination |
Hard |
131 |
Palindrome Partitioning |
JavaScript |
Explaination |
Medium |
129 |
Sum Root to Leaf Numbers |
JavaScript |
|
Medium |
128 |
Longest Consecutive Sequence |
JavaScript |
|
Hard |
125 |
Valid Palindrome |
JavaScript |
Explaination |
Easy |
122 |
Best Time to Buy and Sell Stock II |
JavaScript |
Explaination |
Medium |
121 |
Best Time to Buy and Sell Stock |
JavaScript |
Explaination |
Easy |
120 |
Triangle |
JavaScript |
|
Medium |
119 |
Pascal's Triangle II |
JavaScript |
Explaination |
Easy |
118 |
Pascal's Triangle |
JavaScript |
Explaination |
Easy |
114 |
Flatten Binary Tree to Linked List |
JavaScript |
Explaination |
Medium |
113 |
Path Sum II |
JavaScript |
|
Medium |
112 |
Path Sum |
JavaScript |
|
Easy |
111 |
Minimum Depth of Binary Tree |
JavaScript |
|
Easy |
110 |
Balanced Binary Tree |
JavaScript |
|
Easy |
107 |
Binary Tree Level Order Traversal II |
JavaScript |
|
Easy |
104 |
Maximum Depth of Binary Tree |
JavaScript |
|
Easy |
102 |
Binary Tree Level Order Traversal |
JavaScript |
|
Easy |
100 |
Same Tree |
JavaScript |
|
Easy |
94 |
Binary Tree Inorder Traversal |
JavaScript |
|
Medium |
93 |
Restore IP Addresses |
JavaScript |
|
Medium |
91 |
Decode Ways |
JavaScript |
|
Medium |
90 |
Subsets II |
JavaScript |
|
Medium |
89 |
Gray Code |
JavaScript |
|
Medium |
88 |
Merge Sorted Array |
JavaScript |
Explaination |
Easy |
86 |
Partition List |
JavaScript |
Explaination |
Medium |
85 |
Maximal Rectangle |
JavaScript |
|
Hard |
84 |
Largest Rectangle in Histogram |
JavaScript |
|
Hard |
83 |
Remove Duplicates from Sorted List |
JavaScript |
|
Easy |
82 |
Remove Duplicates from Sorted List II |
JavaScript |
|
Medium |
81 |
Search in Rotated Sorted Array II |
JavaScript |
|
Medium |
80 |
Remove Duplicates from Sorted Array II |
JavaScript |
Explaination |
Medium |
78 |
Subsets |
JavaScript |
|
Medium |
77 |
Combinations |
JavaScript |
|
Medium |
75 |
Sort Colors |
JavaScript |
Explaination |
Medium |
74 |
Search a 2D Matrix |
JavaScript |
|
Medium |
73 |
Set Matrix Zeroes |
JavaScript |
Explaination |
Medium |
70 |
Climbing Stairs |
JavaScript |
Explaination |
Easy |
69 |
Sqrt(x) |
JavaScript |
Explaination |
Medium |
67 |
Add Binary |
JavaScript |
Explaination |
Easy |
66 |
Plus One |
JavaScript |
Explaination |
Easy |
65 |
Valid Number |
JavaScript |
Explaination |
Hard |
64 |
Minimum Path Sum |
JavaScript |
|
Medium |
63 |
Unique Paths II |
JavaScript |
Explaination |
Medium |
62 |
Unique Paths |
JavaScript |
Explaination |
Medium |
61 |
Rotate List |
JavaScript |
Explaination |
Medium |
60 |
Permutation Sequence |
JavaScript |
|
Medium |
59 |
Spiral Matrix II |
JavaScript |
|
Medium |
58 |
Length of Last Word |
JavaScript |
Explaination |
Easy |
57 |
Insert Interval |
JavaScript |
|
Hard |
56 |
Merge Intervals |
JavaScript |
|
Hard |
55 |
Jump Game |
JavaScript |
|
Medium |
54 |
Spiral Matrix |
JavaScript |
|
Medium |
53 |
Maximum Subarray |
JavaScript |
|
Medium |
52 |
N-Queens II |
JavaScript |
|
Hard |
51 |
N-Queens |
JavaScript |
|
Hard |
50 |
Pow(x, n) |
JavaScript |
Explaination |
Medium |
48 |
Rotate Image |
JavaScript |
|
Medium |
47 |
Permutations II |
JavaScript |
|
Medium |
46 |
Permutations |
JavaScript |
|
Medium |
45 |
Jump Game II |
JavaScript |
|
Hard |
41 |
First Missing Positive |
JavaScript |
Explaination |
Hard |
39 |
Combination Sum |
JavaScript |
|
Medium |
38 |
Count and Say |
JavaScript |
Explaination |
Easy |
36 |
Valid Sudoku |
JavaScript |
|
Easy |
35 |
Search Insert Position |
JavaScript |
Explaination |
Medium |
34 |
Search for a Range |
JavaScript |
Explaination |
Medium |
33 |
Search in Rotated Sorted Array |
JavaScript |
|
Hard |
31 |
Next Permutation |
JavaScript |
|
Medium |
29 |
Divide Two Integers |
JavaScript |
Explaination |
Medium |
28 |
Implement strStr() |
JavaScript |
Explaination |
Easy |
27 |
Remove Element |
JavaScript |
Explaination |
Easy |
26 |
Remove Duplicates from Sorted Array |
JavaScript |
Explaination |
Easy |
24 |
Swap Nodes in Pairs |
JavaScript |
Explaination |
Easy |
22 |
Generate Parentheses |
JavaScript |
|
Medium |
21 |
Merge Two Sorted Lists |
JavaScript |
Explaination |
Easy |
20 |
Valid Parentheses |
JavaScript |
Explaination |
Easy |
19 |
Remove Nth Node From End of List |
JavaScript |
Explaination |
Easy |
18 |
4Sum |
JavaScript |
|
Medium |
17 |
Letter Combinations of a Phone Number |
JavaScript |
Explaination |
Medium |
16 |
3Sum Closest |
JavaScript |
|
Medium |
15 |
3Sum |
JavaScript |
|
Medium |
14 |
Longest Common Prefix |
JavaScript |
Explaination |
Easy |
10 |
Regular Expression Matching |
JavaScript |
Explaination |
Hard |
9 |
Palindrome Number |
JavaScript |
Explaination |
Easy |
7 |
Reverse Integer |
JavaScript |
Explaination |
Easy |
6 |
ZigZag Conversion |
JavaScript |
Explaination |
Easy |
5 |
Longest Palindromic Substring |
JavaScript |
Explaination |
Medium |
1 |
Two Sum |
JavaScript |
Explaination |
Easy |