cashlalala / LeetCode-1

My C++ Code for LeetCode OJ

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LeetCode

Author: github.com/lzl124631x

My C++ Code for LeetCode OJ.

Please give this repo a if it inspires you. Thanks. 😊

# Title Difficulty Solution
1 Two Sum Easy Solution
2 Add Two Numbers Medium Solution
3 Longest Substring Without Repeating Characters Medium Solution
5 Longest Palindromic Substring Medium Solution
6 ZigZag Conversion Easy Solution
7 Reverse Integer Easy Solution
9 Palindrome Number Easy Solution
10 Regular Expression Matching Hard Solution
11 Container With Most Water Medium Solution
12 Integer to Roman Medium Solution
13 Roman to Integer Easy Solution
14 Longest Common Prefix Easy Solution
15 3Sum Medium Solution
16 3Sum Closest Medium Solution
17 Letter Combinations of a Phone Number Medium Solution
18 4Sum Medium Solution
19 Remove Nth Node From End of List Easy Solution
20 Valid Parentheses Easy Solution
21 Merge Two Sorted Lists Easy Solution
22 Generate Parentheses Medium Solution
23 Merge k Sorted Lists Hard Solution
24 Swap Nodes in Pairs Easy Solution
25 Reverse Nodes in k-Group Hard Solution
26 Remove Duplicates from Sorted Array Easy Solution
27 Remove Element Easy Solution
29 Divide Two Integers Medium Solution
30 Substring with Concatenation of All Words Hard Solution
31 Next Permutation Medium Solution
32 Longest Valid Parentheses Hard Solution
33 Search in Rotated Sorted Array Hard Solution
34 Search for a Range Medium Solution
35 Search Insert Position Easy Solution
36 Valid Sudoku Easy Solution
38 Count and Say Easy Solution
39 Combination Sum Medium Solution
40 Combination Sum II Medium Solution
42 Trapping Rain Water Hard Solution
43 Multiply Strings Medium Solution
45 Jump Game II Hard Solution
46 Permutations Medium Solution
47 Permutations II Medium Solution
48 Rotate Image Medium Solution
49 Group Anagrams Medium Solution
53 Maximum Subarray Medium Solution
54 Spiral Matrix Medium Solution
55 Jump Game Medium Solution
58 Length of Last Word Easy Solution
59 Spiral Matrix II Medium Solution
60 Permutation Sequence Medium Solution
61 Rotate List Medium Solution
62 Unique Paths Medium Solution
63 Unique Paths II Medium Solution
66 Plus One Easy Solution
67 Add Binary Easy Solution
69 Sqrt(x) Medium Solution
70 Climbing Stairs Easy Solution
71 Simplify Path Medium Solution
72 Edit Distance Hard Solution
74 Search a 2D Matrix Medium Solution
75 Sort Colors Medium Solution
76 Minimum Window Substring Hard Solution
77 Combinations Medium Solution
78 Subsets Medium Solution
79 Word Search Medium Solution
80 Remove Duplicates from Sorted Array II Medium Solution
81 Search in Rotated Sorted Array II Medium Solution
82 Remove Duplicates from Sorted List II Medium Solution
83 Remove Duplicates from Sorted List Easy Solution
84 Largest Rectangle in Histogram Medium Solution
85 Maximal Rectangle Hard Solution
86 Partition List Medium Solution
87 Scramble String Hard Solution
88 Merge Sorted Array Easy Solution
89 Gray Code Medium Solution
90 Subsets II Medium Solution
91 Decode Ways Medium Solution
92 Reverse Linked List II Medium Solution
93 Restore IP Addresses Medium Solution
94 Binary Tree Inorder Traversal Medium Solution
95 Unique Binary Search Trees II Medium Solution
96 Unique Binary Search Trees Medium Solution
98 Validate Binary Search Tree Medium Solution
100 Same Tree Easy Solution
101 Symmetric Tree Easy Solution
102 Binary Tree Level Order Traversal Easy Solution
103 Binary Tree Zigzag Level Order Traversal Medium Solution
104 Maximum Depth of Binary Tree Easy Solution
106 Construct Binary Tree from Inorder and Postorder Traversal Medium Solution
107 Binary Tree Level Order Traversal II Easy Solution
108 Convert Sorted Array to Binary Search Tree Easy Solution
109 Convert Sorted List to Binary Search Tree Medium Solution
110 Balanced Binary Tree Easy Solution
111 Minimum Depth of Binary Tree Easy Solution
112 Path Sum Easy Solution
113 Path Sum II Medium Solution
114 Flatten Binary Tree to Linked List Medium Solution
115 Distinct Subsequences Hard Solution
116 Populating Next Right Pointers in Each Node Medium Solution
117 Populating Next Right Pointers in Each Node II Medium Solution
118 Pascal's Triangle Easy Solution
119 Pascal's Triangle II Easy Solution
121 Best Time to Buy and Sell Stock Easy Solution
122 Best Time to Buy and Sell Stock II Medium Solution
123 Best Time to Buy and Sell Stock III Hard Solution
124 Binary Tree Maximum Path Sum Hard Solution
125 Valid Palindrome Easy Solution
126 Word Ladder II Hard Solution
127 Word Ladder Hard Solution
129 Sum Root to Leaf Numbers Medium Solution
130 Surrounded Regions Medium Solution
131 Palindrome Partitioning Medium Solution
133 Clone Graph Medium Solution
134 Gas Station Medium Solution
136 Single Number Easy Solution
137 Single Number II Medium Solution
138 Copy List with Random Pointer Medium Solution
139 Word Break Medium Solution
140 Word Break II Hard Solution
141 Linked List Cycle Easy Solution
142 Linked List Cycle II Medium Solution
143 Reorder List Medium Solution
144 Binary Tree Preorder Traversal Medium Solution
145 Binary Tree Postorder Traversal Hard Solution
146 LRU Cache Hard Solution
147 Insertion Sort List Medium Solution
148 Sort List Medium Solution
149 Max Points on a Line Hard Solution
150 Evaluate Reverse Polish Notation Medium Solution
151 Reverse Words in a String Medium Solution
152 Maximum Product Subarray Medium Solution
153 Find Minimum in Rotated Sorted Array Medium Solution
154 Find Minimum in Rotated Sorted Array II Hard Solution
156 Binary Tree Upside Down Medium Solution
157 Read N Characters Given Read4 Easy Solution
158 Read N Characters Given Read4 II - Call multiple times Hard Solution
159 Longest Substring with At Most Two Distinct Characters Hard Solution
161 One Edit Distance Medium Solution
164 Maximum Gap Hard Solution
166 Fraction to Recurring Decimal Medium Solution
167 Two Sum II - Input array is sorted Medium Solution
169 Majority Element Easy Solution
173 Binary Search Tree Iterator Medium Solution
174 Dungeon Game Hard Solution
175 Combine Two Tables Easy Solution
176 Second Highest Salary Easy Solution
181 Employees Earning More Than Their Managers Easy Solution
182 Duplicate Emails Easy Solution
188 Best Time to Buy and Sell Stock IV Hard Solution
190 Reverse Bits Easy Solution
195 Tenth Line Easy Solution
198 House Robber Easy Solution
202 Happy Number Easy Solution
204 Count Primes Easy Solution
206 Reverse Linked List Easy Solution
207 Course Schedule Medium Solution
208 Implement Trie (Prefix Tree) Medium Solution
210 Course Schedule II Medium Solution
211 Add and Search Word - Data structure design Medium Solution
212 Word Search II Hard Solution
213 House Robber II Medium Solution
214 Shortest Palindrome Hard Solution
215 Kth Largest Element in an Array Medium Solution
216 Combination Sum III Medium Solution
218 The Skyline Problem Hard Solution
221 Maximal Square Medium Solution
222 Count Complete Tree Nodes Medium Solution
223 Rectangle Area Medium Solution
224 Basic Calculator Hard Solution
225 Implement Stack using Queues Easy Solution
226 Invert Binary Tree Easy Solution
227 Basic Calculator II Medium Solution
229 Majority Element II Medium Solution
232 Implement Queue using Stacks Easy Solution
234 Palindrome Linked List Easy Solution
239 Sliding Window Maximum Hard Solution
240 Search a 2D Matrix II Medium Solution
241 Different Ways to Add Parentheses Medium Solution
243 Shortest Word Distance Easy Solution
244 Shortest Word Distance II Medium Solution
246 Strobogrammatic Number Easy Solution
247 Strobogrammatic Number II Medium Solution
249 Group Shifted Strings Medium Solution
250 Count Univalue Subtrees Medium Solution
252 Meeting Rooms Easy Solution
253 Meeting Rooms II Medium Solution
256 Paint House Easy Solution
257 Binary Tree Paths Easy Solution
259 3Sum Smaller Medium Solution
266 Palindrome Permutation Easy Solution
260 Single Number III Medium Solution
261 Graph Valid Tree Medium Solution
263 Ugly Number Easy Solution
264 Ugly Number II Medium Solution
270 Closest Binary Search Tree Value Easy Solution
271 Encode and Decode Strings Medium Solution
278 First Bad Version Easy Solution
279 Perfect Squares Medium Solution
280 Wiggle Sort Medium Solution
281 Zigzag Iterator Medium Solution
285 Inorder Successor in BST Medium Solution
293 Flip Game Easy Solution
297 Serialize and Deserialize Binary Tree Hard Solution
298 Binary Tree Longest Consecutive Sequence Medium Solution
299 Bulls and Cows Easy Solution
300 Longest Increasing Subsequence Medium Solution
301 Remove Invalid Parentheses Hard Solution
303 Range Sum Query - Immutable Easy Solution
304 Range Sum Query 2D - Immutable Medium Solution
307 Range Sum Query - Mutable Medium Solution
309 Best Time to Buy and Sell Stock with Cooldown Hard Solution
310 Minimum Height Trees Medium Solution
313 Super Ugly Number Medium Solution
315 Count of Smaller Numbers After Self Hard Solution
316 Remove Duplicate Letters Hard Solution
320 Generalized Abbreviation Medium Solution
321 Create Maximum Number Hard Solution
322 Coin Change Medium Solution
324 Wiggle Sort II Medium Solution
327 Count of Range Sum Hard Solution
328 Odd Even Linked List Medium Solution
329 Longest Increasing Path in a Matrix Hard Solution
330 Patching Array Hard Solution
331 Verify Preorder Serialization of a Binary Tree Medium Solution
332 Reconstruct Itinerary Medium Solution
333 Largest BST Subtree Medium Solution
334 Increasing Triplet Subsequence Medium Solution
335 Self Crossing Hard Solution
336 Palindrome Pairs Hard Solution
337 House Robber III Medium Solution
338 Counting Bits Medium Solution
339 Nested List Weight Sum Easy Solution
340 Longest Substring with At Most K Distinct Characters Hard Solution
341 Flatten Nested List Iterator Medium Solution
342 Power of Four Easy Solution
343 Integer Break Medium Solution
344 Reverse String Easy Solution
344 Reverse String Easy Solution
345 Reverse Vowels of a String Easy Solution
346 Moving Average from Data Stream Easy Solution
348 Design Tic-Tac-Toe Medium Solution
349 Intersection of Two Arrays Easy Solution
350 Intersection of Two Arrays II Easy Solution
352 Data Stream as Disjoint Intervals Hard Solution
354 Russian Doll Envelopes Hard Solution
355 Design Twitter Medium Solution
357 Count Numbers with Unique Digits Medium Solution
359 Logger Rate Limiter Easy Solution
360 Sort Transformed Array Medium Solution
361 Bomb Enemy Medium Solution
363 Max Sum of Rectangle No Larger Than K Hard Solution
364 Nested List Weight Sum II Medium Solution
365 Water and Jug Problem Medium Solution
366 Find Leaves of Binary Tree Medium Solution
367 Valid Perfect Square Easy Solution
368 Largest Divisible Subset Medium Solution
369 Plus One Linked List Medium Solution
370 Range Addition Medium Solution
371 Sum of Two Integers Easy Solution
371 Sum of Two Integers Easy Solution
372 Super Pow Medium Solution
373 Find K Pairs with Smallest Sums Medium Solution
374 Guess Number Higher or Lower Easy Solution
375 Guess Number Higher or Lower II Medium Solution
376 Wiggle Subsequence Medium Solution
377 Combination Sum IV Medium Solution
378 Kth Smallest Element in a Sorted Matrix Medium Solution
379 Design Phone Directory Medium Solution
380 Insert Delete GetRandom O(1) Hard Solution
381 Insert Delete GetRandom O(1) - Duplicates allowed Hard Solution
382 Linked List Random Node Medium Solution
383 Ransom Note Easy Solution
384 Shuffle an Array Medium Solution
385 Mini Parser Medium Solution
386 Lexicographical Numbers Medium Solution
387 First Unique Character in a String Easy Solution
388 Longest Absolute File Path Medium Solution
389 Find the Difference Easy Solution
390 Elimination Game Medium Solution
391 Perfect Rectangle Hard Solution
392 Is Subsequence Medium Solution
393 UTF-8 Validation Medium Solution
394 Decode String Medium Solution
395 Longest Substring with At Least K Repeating Characters Medium Solution
396 Rotate Function Easy Solution
397 Integer Replacement Medium Solution
398 Random Pick Index Medium Solution
399 Evaluate Division Medium Solution
400 Nth Digit Easy Solution
401 Binary Watch Easy Solution
402 Remove K Digits Medium Solution
403 Frog Jump Hard Solution
404 Sum of Left Leaves Easy Solution
405 Convert a Number to Hexadecimal Easy Solution
406 Queue Reconstruction by Height Medium Solution
407 Trapping Rain Water II Hard Solution
408 Valid Word Abbreviation Easy Solution
409 Longest Palindrome Easy Solution
410 Split Array Largest Sum Hard Solution
412 Fizz Buzz Easy Solution
412 Fizz Buzz Easy Solution
413 Arithmetic Slices Medium Solution
414 Third Maximum Number Easy Solution
415 Add Strings Easy Solution
416 Partition Equal Subset Sum Medium Solution
417 Pacific Atlantic Water Flow Medium Solution
419 Battleships in a Board Medium Solution
420 Strong Password Checker Hard Solution
421 Maximum XOR of Two Numbers in an Array Medium Solution
422 Valid Word Square Easy Solution
423 Reconstruct Original Digits from English Medium Solution
424 Longest Repeating Character Replacement Medium Solution
427 Construct Quad Tree Easy Solution
429 N-ary Tree Level Order Traversal Easy Solution
432 All O`one Data Structure Hard Solution
434 Number of Segments in a String Easy Solution
435 Non-overlapping Intervals Medium Solution
436 Find Right Interval Medium Solution
437 Path Sum III Easy Solution
438 Find All Anagrams in a String Easy Solution
440 K-th Smallest in Lexicographical Order Hard Solution
441 Arranging Coins Easy Solution
442 Find All Duplicates in an Array Medium Solution
443 String Compression Easy Solution
445 Add Two Numbers II Medium Solution
446 Arithmetic Slices II - Subsequence Hard Solution
447 Number of Boomerangs Easy Solution
448 Find All Numbers Disappeared in an Array Easy Solution
449 Serialize and Deserialize BST Medium Solution
450 Delete Node in a BST Medium Solution
451 Sort Characters By Frequency Medium Solution
452 Minimum Number of Arrows to Burst Balloons Medium Solution
453 Minimum Moves to Equal Array Elements Easy Solution
454 4Sum II Medium Solution
455 Assign Cookies Easy Solution
456 132 Pattern Medium Solution
459 Repeated Substring Pattern Easy Solution
460 LFU Cache Hard Solution
461 Hamming Distance Easy Solution
462 Minimum Moves to Equal Array Elements II Medium Solution
463 Island Perimeter Easy Solution
464 Can I Win Medium Solution
466 Count The Repetitions Hard Solution
467 Unique Substrings in Wraparound String Medium Solution
468 Validate IP Address Medium Solution
472 Concatenated Words Hard Solution
473 Matchsticks to Square Medium Solution
474 Ones and Zeroes Medium Solution
475 Heaters Easy Solution
476 Number Complement Easy Solution
477 Total Hamming Distance Medium Solution
478 Generate Random Point in a Circle Medium Solution
480 Sliding Window Median Hard Solution
481 Magical String Medium Solution
482 License Key Formatting Medium Solution
483 Smallest Good Base Hard Solution
485 Max Consecutive Ones Easy Solution
486 Predict the Winner Medium Solution
487 Max Consecutive Ones II Medium Solution
488 Zuma Game Hard Solution
489 Robot Room Cleaner Hard Solution
490 The Maze Medium Solution
491 Increasing Subsequences Medium Solution
492 Construct the Rectangle Easy Solution
494 Target Sum Medium Solution
495 Teemo Attacking Medium Solution
496 Next Greater Element I Medium Solution
498 Diagonal Traverse Medium Solution
500 Keyboard Row Easy Solution
501 Find Mode in Binary Search Tree Easy Solution
502 IPO Hard Solution
503 Next Greater Element II Medium Solution
504 Base 7 Easy Solution
506 Relative Ranks Easy Solution
508 Most Frequent Subtree Sum Medium Solution
509 Fibonacci Number Easy Solution
513 Find Bottom Left Tree Value Medium Solution
515 Find Largest Value in Each Tree Row Medium Solution
516 Longest Palindromic Subsequence Medium Solution
517 Super Washing Machines Hard Solution
518 Coin Change 2 Medium Solution
519 Random Flip Matrix Medium Solution
520 Detect Capital Easy Solution
521 Longest Uncommon Subsequence I Easy Solution
523 Continuous Subarray Sum Medium Solution
524 Longest Word in Dictionary through Deleting Medium Solution
525 Contiguous Array Medium Solution
526 Beautiful Arrangement Medium Solution
528 Random Pick with Weight Medium Solution
529 Minesweeper Medium Solution
530 Minimum Absolute Difference in BST Easy Solution
532 K-diff Pairs in an Array Easy Solution
535 Encode and Decode TinyURL Medium Solution
536 Construct Binary Tree from String Medium Solution
537 Complex Number Multiplication Medium Solution
538 Convert BST to Greater Tree Medium Solution
539 Minimum Time Difference Medium Solution
540 Single Element in a Sorted Array Medium Solution
541 Reverse String II Easy Solution
542 01 Matrix Medium Solution
543 Diameter of Binary Tree Easy Solution
544 Output Contest Matches Medium Solution
547 Friend Circles Medium Solution
549 Binary Tree Longest Consecutive Sequence II Medium Solution
553 Optimal Division Medium Solution
554 Brick Wall Medium Solution
556 Next Greater Element III Medium Solution
557 Reverse Words in a String III Easy Solution
558 Quad Tree Intersection Easy Solution
559 Maximum Depth of N-ary Tree Easy Solution
560 Subarray Sum Equals K Medium Solution
561 Array Partition I Easy Solution
562 Longest Line of Consecutive One in Matrix Medium Solution
563 Binary Tree Tilt Easy Solution
566 Reshape the Matrix Easy Solution
567 Permutation in String Medium Solution
570 Managers with at Least 5 Direct Reports Medium Solution
572 Subtree of Another Tree Easy Solution
575 Distribute Candies Easy Solution
577 Employee Bonus Easy Solution
581 Shortest Unsorted Continuous Subarray Easy Solution
582 Kill Process Medium Solution
583 Delete Operation for Two Strings Medium Solution
584 Find Customer Referee Easy Solution
586 Customer Placing the Largest Number of Orders Easy Solution
589 N-ary Tree Preorder Traversal Easy Solution
590 N-ary Tree Postorder Traversal Easy Solution
591 Tag Validator Hard Solution
594 Longest Harmonious Subsequence Easy Solution
595 Big Countries Easy Solution
597 Friend Requests I: Overall Acceptance Rate Easy Solution
599 Minimum Index Sum of Two Lists Easy Solution
600 Non-negative Integers without Consecutive Ones Hard Solution
604 Design Compressed String Iterator Easy Solution
605 Can Place Flowers Easy Solution
606 Construct String from Binary Tree Easy Solution
607 Sales Person Easy Solution
609 Find Duplicate File in System Medium Solution
610 Triangle Judgement Easy Solution
611 Valid Triangle Number Medium Solution
613 Shortest Distance in a Line Easy Solution
616 Add Bold Tag in String Medium Solution
616 Add Bold Tag in String Medium Solution
617 Merge Two Binary Trees Easy Solution
620 Not Boring Movies Easy Solution
622 Design Circular Queue Medium Solution
627 Swap Salary Easy Solution
629 K Inverse Pairs Array Hard Solution
603 Consecutive Available Seats Easy Solution
636 Exclusive Time of Functions Medium Solution
637 Average of Levels in Binary Tree Easy Solution
638 Shopping Offers Medium Solution
640 Solve the Equation Medium Solution
643 Maximum Average Subarray I Easy Solution
647 Palindromic Substrings Medium Solution
648 Replace Words Medium Solution
651 4 Keys Keyboard Medium Solution
652 Find Duplicate Subtrees Medium Solution
653 Two Sum IV - Input is a BST Easy Solution
654 Maximum Binary Tree Medium Solution
655 Print Binary Tree Medium Solution
657 Robot Return to Origin Easy Solution
659 Split Array into Consecutive Subsequences Medium Solution
662 Maximum Width of Binary Tree Medium Solution
663 Equal Tree Partition Medium Solution
666 Path Sum IV Medium Solution
669 Trim a Binary Search Tree Easy Solution
670 Maximum Swap Medium Solution
674 Longest Continuous Increasing Subsequence Easy Solution
676 Implement Magic Dictionary Medium Solution
677 Map Sum Pairs Medium Solution
678 Valid Parenthesis String Medium Solution
680 Valid Palindrome II Easy Solution
682 Baseball Game Easy Solution
684 Redundant Connection Medium Solution
688 Knight Probability in Chessboard Medium Solution
690 Employee Importance Easy Solution
693 Binary Number with Alternating Bits Easy Solution
694 Number of Distinct Islands Medium Solution
695 Max Area of Island Medium Solution
697 Degree of an Array Easy Solution
700 Search in a Binary Search Tree Easy Solution
701 Insert into a Binary Search Tree Medium Solution
702 Search in a Sorted Array of Unknown Size Medium Solution
703 Kth Largest Element in a Stream Easy Solution
704 Binary Search Easy Solution
705 Design HashSet Easy Solution
706 Design HashMap Easy Solution
707 Design Linked List Easy Solution
709 To Lower Case Easy Solution
712 Minimum ASCII Delete Sum for Two Strings Medium Solution
718 Maximum Length of Repeated Subarray Medium Solution
720 Longest Word in Dictionary Easy Solution
723 Candy Crush Medium Solution
724 Find Pivot Index Easy Solution
725 Split Linked List in Parts Medium Solution
728 Self Dividing Numbers Easy Solution
733 Flood Fill Easy Solution
735 Asteroid Collision Medium Solution
739 Daily Temperatures Medium Solution
744 Find Smallest Letter Greater Than Target Easy Solution
745 Prefix and Suffix Search Hard Solution
746 Min Cost Climbing Stairs Easy Solution
747 Largest Number At Least Twice of Others Easy Solution
748 Shortest Completing Word Easy Solution
750 Number Of Corner Rectangles Medium Solution
752 Open the Lock Medium Solution
754 Reach a Number Easy Solution
755 Pour Water Medium Solution
760 Find Anagram Mappings Easy Solution
762 Prime Number of Set Bits in Binary Representation Easy Solution
763 Partition Labels Medium Solution
766 Toeplitz Matrix Easy Solution
767 Reorganize String Medium Solution
770 Basic Calculator IV Hard Solution
771 Jewels and Stones Easy Solution
777 Swap Adjacent in LR String Medium Solution
783 Minimum Distance Between BST Nodes Easy Solution
784 Letter Case Permutation Easy Solution
788 Rotated Digits Easy Solution
791 Custom Sort String Medium Solution
794 Valid Tic-Tac-Toe State Medium Solution
793 Preimage Size of Factorial Zeroes Function Hard Solution
795 Number of Subarrays with Bounded Maximum Medium Solution
796 Rotate String Easy Solution
797 All Paths From Source to Target Medium Solution
800 Similar RGB Color Easy Solution
804 Unique Morse Code Words Easy Solution
806 Number of Lines To Write String Easy Solution
807 Max Increase to Keep City Skyline Medium Solution
809 Expressive Words Medium Solution
811 Subdomain Visit Count Easy Solution
812 Largest Triangle Area Easy Solution
817 Linked List Components Medium Solution
819 Most Common Word Easy Solution
821 Shortest Distance to a Character Easy Solution
823 Binary Trees With Factors Medium Solution
824 Goat Latin Easy Solution
825 Friends Of Appropriate Ages Medium Solution
826 Most Profit Assigning Work Medium Solution
828 Unique Letter String Hard Solution
829 Consecutive Numbers Sum Hard Solution
830 Positions of Large Groups Easy Solution
832 Flipping an Image Easy Solution
835 Image Overlap Medium Solution
836 Rectangle Overlap Easy Solution
840 Magic Squares In Grid Easy Solution
841 Keys and Rooms Medium Solution
852 Peak Index in a Mountain Array Easy Solution
859 Buddy Strings Easy Solution
856 Score of Parentheses Medium Solution
860 Lemonade Change Easy Solution
861 Score After Flipping Matrix Medium Solution
862 Shortest Subarray with Sum at Least K Hard Solution
863 All Nodes Distance K in Binary Tree Medium Solution
867 Transpose Matrix Easy Solution
868 Binary Gap Easy Solution
869 Reordered Power of 2 Medium Solution
870 Advantage Shuffle Medium Solution
872 Leaf-Similar Trees Easy Solution
874 Walking Robot Simulation Easy Solution
875 Koko Eating Bananas Medium Solution
876 Middle of the Linked List Easy Solution
877 Stone Game Medium Solution
881 Boats to Save People Medium Solution
883 Projection Area of 3D Shapes Easy Solution
884 Uncommon Words from Two Sentences Easy Solution
885 Spiral Matrix III Medium Solution
887 Super Egg Drop Hard Solution
888 Fair Candy Swap Easy Solution
889 Construct Binary Tree from Preorder and Postorder Traversal Medium Solution
890 Find and Replace Pattern Medium Solution
892 Surface Area of 3D Shapes Easy Solution
893 Groups of Special-Equivalent Strings Easy Solution
894 All Possible Full Binary Trees Medium Solution
897 Increasing Order Search Tree Easy Solution
896 Monotonic Array Easy Solution
899 Orderly Queue Hard Solution
902 Numbers At Most N Given Digit Set Hard Solution
905 Sort Array By Parity Easy Solution
906 Super Palindromes Hard Solution
908 Smallest Range I Easy Solution
911 Online Election Medium Solution
912 Sort an Array Medium Solution
914 X of a Kind in a Deck of Cards Easy Solution
917 Reverse Only Letters Easy Solution
919 Complete Binary Tree Inserter Medium Solution
921 Minimum Add to Make Parentheses Valid Medium Solution
922 Sort Array By Parity II Easy Solution
924 Minimize Malware Spread Hard Solution
926 Flip String to Monotone Increasing Medium Solution
928 Minimize Malware Spread II Hard Solution
929 Unique Email Addresses Easy Solution
931 Minimum Falling Path Sum Medium Solution
933 Number of Recent Calls Easy Solution
935 Knight Dialer Medium Solution
936 Stamping The Sequence Hard Solution
937 Reorder Log Files Easy Solution
938 Range Sum of BST Easy Solution
939 Minimum Area Rectangle Medium Solution
940 Distinct Subsequences II Hard Solution
941 Valid Mountain Array Easy Solution
942 DI String Match Easy Solution
944 Delete Columns to Make Sorted Easy Solution
945 Minimum Increment to Make Array Unique Medium Solution
946 Validate Stack Sequences Medium Solution
947 Most Stones Removed with Same Row or Column Medium Solution
948 Bag of Tokens Medium Solution
949 Largest Time for Given Digits Easy Solution
950 Reveal Cards In Increasing Order Medium Solution
951 Flip Equivalent Binary Trees Medium Solution
952 Largest Component Size by Common Factor Hard Solution
953 Verifying an Alien Dictionary Easy Solution
954 Array of Doubled Pairs Medium Solution
955 Delete Columns to Make Sorted II Medium Solution
956 Tallest Billboard Hard Solution
957 Prison Cells After N Days Medium Solution
958 Check Completeness of a Binary Tree Medium Solution
959 Regions Cut By Slashes Medium Solution
961 N-Repeated Element in Size 2N Array Easy Solution
962 Maximum Width Ramp Medium Solution
968 Binary Tree Cameras Hard Solution
969 Pancake Sorting Medium Solution
970 Powerful Integers Easy Solution
971 Flip Binary Tree To Match Preorder Traversal Medium Solution
973 K Closest Points to Origin Easy Solution
977 Squares of a Sorted Array Easy Solution
979 Distribute Coins in Binary Tree Medium Solution
980 Unique Paths III Hard Solution
985 Sum of Even Numbers After Queries Easy Solution
986 Interval List Intersections Medium Solution
998 Maximum Binary Tree II Medium Solution
999 Available Captures for Rook Easy Solution
1002 Find Common Characters Easy Solution
1004 Max Consecutive Ones III Medium Solution
1008 Construct Binary Search Tree from Preorder Traversal Medium Solution
1011 Capacity To Ship Packages Within D Days Medium Solution
1012 Complement of Base 10 Integer Easy Solution
1013 Pairs of Songs With Total Durations Divisible by 60 Easy Solution
1014 Best Sightseeing Pair Medium Solution
1016 Binary String With Substrings Representing 1 To N Medium Solution
1019 Next Greater Node In Linked List Medium Solution
1021 Remove Outermost Parentheses Easy Solution
1022 Sum of Root To Leaf Binary Numbers Easy Solution
1025 Divisor Game Easy Solution
1028 Recover a Tree From Preorder Traversal Hard Solution
1030 Matrix Cells in Distance Order Easy Solution
1031 Maximum Sum of Two Non-Overlapping Subarrays Medium Solution
1037 Valid Boomerang Easy Solution
1038 Binary Search Tree to Greater Sum Tree Medium Solution
1039 Minimum Score Triangulation of Polygon Medium Solution
1071 Greatest Common Divisor of Strings Easy Solution
1072 Flip Columns For Maximum Number of Equal Rows Medium Solution
1073 Adding Two Negabinary Numbers Medium Solution
1074 Number of Submatrices That Sum to Target Hard Solution
5083 Occurrences After Bigram Easy Solution
5084 Insufficient Nodes in Root to Leaf Paths Medium Solution
5086 Smallest Subsequence of Distinct Characters Medium Solution
5087 Letter Tile Possibilities Medium Solution

License

All rights reserved by github.com/lzl124631x. Contact me if you want to redistribute the code. No commercial use.

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My C++ Code for LeetCode OJ


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