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readme.md

Leetcode Solutions with JavaScript PRs Welcome

欢迎关注我的个人公众号「码农随手记」

Update time: Tue Dec 26 2017 22:27:14 GMT+0800 (CST)

I have solved 350 / 668 problems while 124 problems are still locked.

(Notes: 📘 means you need to buy a book from Leetcode)

# Title Source Code Explanation Difficulty
754 Cracking the Safe Hard
753 Open the Lock Medium
752 IP to CIDR Medium
751 Number Of Corner Rectangles 📘 Medium
750 Contain Virus Hard
749 Shortest Completing Word Medium
748 Largest Number Greater Than Twice of Others Easy
747 Min Cost Climbing Stairs Easy
746 Prefix and Suffix Search Hard
745 Find Smallest Letter Greater Than Target Easy
744 Network Delay Time Medium
743 Closest Leaf in a Binary Tree 📘 Medium
741 Cherry Pickup Hard
740 Delete and Earn Medium
739 Daily Temperatures JavaScript Python Medium
738 Monotone Increasing Digits Medium
737 Sentence Similarity II 📘 Medium
736 Parse Lisp Expression Hard
735 Asteroid Collision Medium
734 Sentence Similarity 📘 Easy
733 Flood Fill Easy
732 My Calendar III Hard
731 My Calendar II Medium
730 Count Different Palindromic Subsequences Hard
729 My Calendar I Medium
728 Self Dividing Numbers Easy
727 Minimum Window Subsequence 📘 Hard
726 Number of Atoms Hard
725 Split Linked List in Parts Medium
724 Find Pivot Index Easy
723 Candy Crush 📘 Medium
722 Remove Comments Medium
721 Accounts Merge Medium
720 Longest Word in Dictionary Easy
719 Find K-th Smallest Pair Distance Hard
718 Maximum Length of Repeated Subarray Medium
717 1-bit and 2-bit Characters Easy
716 Max Stack 📘 Hard
715 Range Module Hard
714 Best Time to Buy and Sell Stock with Transaction Fee Medium
713 Subarray Product Less Than K Medium
712 Minimum ASCII Delete Sum for Two Strings Medium
711 Number of Distinct Islands II 📘 Hard
699 Falling Squares Hard
698 Partition to K Equal Sum Subsets Medium
697 Degree of an Array JavaScript Python Easy
696 Count Binary Substrings Easy
695 Max Area of Island Easy
694 Number of Distinct Islands 📘 Medium
693 Binary Number with Alternating Bits Easy
692 Top K Frequent Words Medium
691 Stickers to Spell Word Hard
690 Employee Importance Easy
689 Maximum Sum of 3 Non-Overlapping Subarrays Hard
688 Knight Probability in Chessboard Medium
687 Longest Univalue Path Easy
686 Repeated String Match Easy
685 Redundant Connection II Hard
684 Redundant Connection Medium
683 K Empty Slots 📘 Hard
682 Baseball Game Easy
681 Next Closest Time 📘 Medium
680 Valid Palindrome II Easy
679 24 Game Hard
678 Valid Parenthesis String Medium
677 Map Sum Pairs Medium
676 Implement Magic Dictionary Medium
675 Cut Off Trees for Golf Event Hard
674 Longest Continuous Increasing Subsequence Easy
673 Number of Longest Increasing Subsequence Medium
672 Bulb Switcher II Medium
671 Second Minimum Node In a Binary Tree Easy
670 Maximum Swap Medium
669 Trim a Binary Search Tree Easy
668 Kth Smallest Number in Multiplication Table Hard
667 Beautiful Arrangement II Medium
666 Path Sum IV 📘 Medium
665 Non-decreasing Array Easy
664 Strange Printer Hard
663 Equal Tree Partition 📘 Medium
662 Maximum Width of Binary Tree Medium
661 Image Smoother Easy
660 Remove 9 📘 Hard
659 Split Array into Consecutive Subsequences Medium
658 Find K Closest Elements Medium
657 Judge Route Circle Easy
656 Coin Path 📘 Hard
655 Print Binary Tree Medium
654 Maximum Binary Tree Medium
653 Two Sum IV - Input is a BST Easy
652 Find Duplicate Subtrees Medium
651 4 Keys Keyboard 📘 Medium
650 2 Keys Keyboard Medium
649 Dota2 Senate Medium
648 Replace Words Medium
647 Palindromic Substrings Medium
646 Maximum Length of Pair Chain Medium
645 Set Mismatch Easy
644 Maximum Average Subarray II 📘 Hard
643 Maximum Average Subarray I Easy
642 Design Search Autocomplete System 📘 Hard
640 Solve the Equation Medium
639 Decode Ways II Hard
638 Shopping Offers Medium
637 Average of Levels in Binary Tree JavaScript Python Easy
636 Exclusive Time of Functions Medium
635 Design Log Storage System 📘 Medium
634 Find the Derangement of An Array 📘 Medium
633 Sum of Square Numbers JavaScript Python Easy
632 Smallest Range Hard
631 Design Excel Sum Formula 📘 Hard
630 Course Schedule III Hard
629 K Inverse Pairs Array Hard
628 Maximum Product of Three Numbers Easy
625 Minimum Factorization 📘 Medium
624 Maximum Distance in Arrays 📘 Easy
623 Add One Row to Tree Medium
621 Task Scheduler Medium
617 Merge Two Binary Trees Easy
616 Add Bold Tag in String 📘 Medium
611 Valid Triangle Number Medium
609 Find Duplicate File in System Medium
606 Construct String from Binary Tree Easy
605 Can Place Flowers Easy
604 Design Compressed String Iterator 📘 Easy
600 Non-negative Integers without Consecutive Ones Hard
599 Minimum Index Sum of Two Lists Easy
598 Range Addition II Easy
594 Longest Harmonious Subsequence Easy
593 Valid Square Medium
592 Fraction Addition and Subtraction Medium
591 Tag Validator Hard
588 Design In-Memory File System 📘 Hard
587 Erect the Fence Hard
583 Delete Operation for Two Strings Medium
582 Kill Process 📘 Medium
581 Shortest Unsorted Continuous Subarray Easy
576 Out of Boundary Paths Medium
575 Distribute Candies JavaScript Python Easy
573 Squirrel Simulation 📘 Medium
572 Subtree of Another Tree Easy
568 Maximum Vacation Days 📘 Hard
567 Permutation in String Medium
566 Reshape the Matrix Easy
565 Array Nesting Medium
564 Find the Closest Palindrome Hard
563 Binary Tree Tilt JavaScript Python Easy
562 Longest Line of Consecutive One in Matrix 📘 Medium
561 Array Partition I Easy
560 Subarray Sum Equals K Medium
557 Reverse Words in a String III JavaScript Python Easy
556 Next Greater Element III Medium
555 Split Concatenated Strings 📘 Medium
554 Brick Wall Medium
553 Optimal Division Medium
552 Student Attendance Record II Hard
551 Student Attendance Record I Easy
549 Binary Tree Longest Consecutive Sequence II 📘 Medium
548 Split Array with Equal Sum 📘 Medium
547 Friend Circles Python Medium
546 Remove Boxes Hard
545 Boundary of Binary Tree 📘 Medium
544 Output Contest Matches 📘 Medium
543 Diameter of Binary Tree Python Easy
542 01 Matrix JavaScript Medium
541 Reverse String II Python Easy
540 Single Element in a Sorted Array Medium
539 Minimum Time Difference JavaScript Medium
538 Convert BST to Greater Tree Python Easy
537 Complex Number Multiplication Python Medium
536 Construct Binary Tree from String 📘 Medium
535 Encode and Decode TinyURL JavaScript Medium
533 Lonely Pixel II 📘 Python Medium
532 K-diff Pairs in an Array Python Easy
531 Lonely Pixel I 📘 Python Medium
530 Minimum Absolute Difference in BST Python Easy
529 Minesweeper Python Medium
527 Word Abbreviation 📘 Hard
526 Beautiful Arrangement JavaScript Medium
525 Contiguous Array Medium
524 Longest Word in Dictionary through Deleting Medium
523 Continuous Subarray Sum Python Explanation Medium
522 Longest Uncommon Subsequence II Medium
521 Longest Uncommon Subsequence I Python Easy
520 Detect Capital JavaScript Easy
517 Super Washing Machines Hard
516 Longest Palindromic Subsequence Medium
515 Find Largest Value in Each Tree Row JavaScript Medium
514 Freedom Trail Hard
513 Find Bottom Left Tree Value JavaScript Medium
508 Most Frequent Subtree Sum JavaScript Medium
507 Perfect Number Python Easy
506 Relative Ranks JavaScript Easy
505 The Maze II 📘 Medium
504 Base 7 JavaScript Easy
503 Next Greater Element II JavaScript Medium
502 IPO JavaScript Hard
501 Find Mode in Binary Search Tree JavaScript Easy
500 Keyboard Row JavaScript Easy
499 The Maze III 📘 Hard
498 Diagonal Traverse JavaScript Medium
496 Next Greater Element I JavaScript Easy
495 Teemo Attacking JavaScript Medium
494 Target Sum JavaScript Explanation Medium
493 Reverse Pairs Hard
492 Construct the Rectangle JavaScript Easy
491 Increasing Subsequences JavaScript Medium
490 The Maze 📘 Medium
488 Zuma Game Hard
487 Max Consecutive Ones II 📘 Medium
486 Predict the Winner JavaScript Explanation Medium
485 Max Consecutive Ones JavaScript Easy
484 Find Permutation 📘 Medium
483 Smallest Good Base Hard
482 License Key Formatting JavaScript Easy
481 Magical String JavaScript Medium
480 Sliding Window Median JavaScript Hard
479 Largest Palindrome Product Easy
477 Total Hamming Distance JavaScript Medium
476 Number Complement JavaScript Easy
475 Heaters JavaScript Easy
474 Ones and Zeroes JavaScript Medium
473 Matchsticks to Square JavaScript Explanation Medium
472 Concatenated Words Hard
471 Encode String with Shortest Length 📘 Hard
469 Convex Polygon 📘 Medium
468 Validate IP Address JavaScript Medium
467 Unique Substrings in Wraparound String Medium
466 Count The Repetitions Hard
465 Optimal Account Balancing 📘 Hard
464 Can I Win Medium
463 Island Perimeter JavaScript Easy
462 Minimum Moves to Equal Array Elements II JavaScript Explanation Medium
461 Hamming Distance JavaScript Easy
460 LFU Cache Hard
459 Repeated Substring Pattern JavaScript Easy
456 132 Pattern Medium
455 Assign Cookies JavaScript Easy
454 4Sum II JavaScript Medium
453 Minimum Moves to Equal Array Elements JavaScript Explanation Easy
452 Minimum Number of Arrows to Burst Balloons JavaScript Medium
451 Sort Characters By Frequency JavaScript Medium
450 Delete Node in a BST Medium
449 Serialize and Deserialize BST Medium
448 Find All Numbers Disappeared in an Array JavaScript Easy
447 Number of Boomerangs JavaScript Easy
446 Arithmetic Slices II - Subsequence Hard
445 Add Two Numbers II JavaScript Medium
444 Sequence Reconstruction 📘 Medium
443 String Compression Easy
442 Find All Duplicates in an Array JavaScript Medium
441 Arranging Coins JavaScript Easy
440 K-th Smallest in Lexicographical Order Hard
439 Ternary Expression Parser 📘 Medium
438 Find All Anagrams in a String JavaScript Explanation Easy
437 Path Sum III JavaScript Explanation Easy
436 Find Right Interval JavaScript Medium
435 Non-overlapping Intervals JavaScript Medium
434 Number of Segments in a String JavaScript Easy
432 All O`one Data Structure Hard
425 Word Squares 📘 Hard
424 Longest Repeating Character Replacement Medium
423 Reconstruct Original Digits from English JavaScript Medium
422 Valid Word Square 📘 Easy
421 Maximum XOR of Two Numbers in an Array JavaScript Explanation Medium
420 Strong Password Checker Hard
419 Battleships in a Board JavaScript Medium
418 Sentence Screen Fitting 📘 Medium
417 Pacific Atlantic Water Flow JavaScript Medium
416 Partition Equal Subset Sum Medium
415 Add Strings JavaScript Easy
414 Third Maximum Number JavaScript Easy
413 Arithmetic Slices JavaScript Medium
412 Fizz Buzz JavaScript Easy
411 Minimum Unique Word Abbreviation 📘 Hard
410 Split Array Largest Sum Hard
409 Longest Palindrome JavaScript Easy
408 Valid Word Abbreviation 📘 Easy
407 Trapping Rain Water II Hard
406 Queue Reconstruction by Height JavaScript Medium
405 Convert a Number to Hexadecimal JavaScript Easy
404 Sum of Left Leaves JavaScript Easy
403 Frog Jump Hard
402 Remove K Digits JavaScript Explanation Medium
401 Binary Watch JavaScript Easy
400 Nth Digit JavaScript Easy
399 Evaluate Division Medium
398 Random Pick Index Python Medium
397 Integer Replacement JavaScript Medium
396 Rotate Function JavaScript Medium
395 Longest Substring with At Least K Repeating Characters JavaScript Explanation Medium
394 Decode String JavaScript Medium
393 UTF-8 Validation JavaScript Medium
392 Is Subsequence JavaScript Medium
391 Perfect Rectangle Hard
390 Elimination Game Medium
389 Find the Difference JavaScript Easy
388 Longest Absolute File Path JavaScript Medium
387 First Unique Character in a String JavaScript Easy
386 Lexicographical Numbers JavaScript Medium
385 Mini Parser JavaScript Medium
384 Shuffle an Array JavaScript Medium
383 Ransom Note JavaScript Easy
382 Linked List Random Node JavaScript Medium
381 Insert Delete GetRandom O(1) - Duplicates allowed Python Hard
380 Insert Delete GetRandom O(1) Python Medium
379 Design Phone Directory 📘 Medium
378 Kth Smallest Element in a Sorted Matrix JavaScript Medium
377 Combination Sum IV JavaScript Medium
376 Wiggle Subsequence JavaScript Medium
375 Guess Number Higher or Lower II JavaScript Medium
374 Guess Number Higher or Lower C++ Easy
373 Find K Pairs with Smallest Sums JavaScript Medium
372 Super Pow JavaScript Medium
371 Sum of Two Integers JavaScript Easy
370 Range Addition 📘 Medium
369 Plus One Linked List 📘 Medium
368 Largest Divisible Subset JavaScript Medium
367 Valid Perfect Square JavaScript Easy
366 Find Leaves of Binary Tree 📘 Medium
365 Water and Jug Problem Medium
364 Nested List Weight Sum II 📘 Medium
363 Max Sum of Rectangle No Larger Than K Hard
362 Design Hit Counter 📘 Medium
361 Bomb Enemy 📘 Medium
360 Sort Transformed Array 📘 Medium
359 Logger Rate Limiter 📘 Easy
358 Rearrange String k Distance Apart 📘 Hard
357 Count Numbers with Unique Digits JavaScript Medium
356 Line Reflection 📘 Medium
355 Design Twitter Medium
354 Russian Doll Envelopes Hard
353 Design Snake Game 📘 Medium
352 Data Stream as Disjoint Intervals Hard
351 Android Unlock Patterns 📘 Medium
350 Intersection of Two Arrays II JavaScript Easy
349 Intersection of Two Arrays JavaScript Easy
348 Design Tic-Tac-Toe 📘 Medium
347 Top K Frequent Elements JavaScript Explanation Medium
346 Moving Average from Data Stream 📘 Easy
345 Reverse Vowels of a String JavaScript Explanation Easy
344 Reverse String JavaScript Explanation Easy
343 Integer Break JavaScript Explanation Medium
342 Power of Four JavaScript Explanation Easy
341 Flatten Nested List Iterator JavaScript Explanation Medium
340 Longest Substring with At Most K Distinct Characters 📘 Hard
339 Nested List Weight Sum 📘 Easy
338 Counting Bits JavaScript Explanation Medium
337 House Robber III JavaScript Explanation Medium
336 Palindrome Pairs JavaScript Hard
335 Self Crossing JavaScript Explanation Hard
334 Increasing Triplet Subsequence JavaScript Explanation Medium
333 Largest BST Subtree 📘 Medium
332 Reconstruct Itinerary Medium
331 Verify Preorder Serialization of a Binary Tree JavaScript Medium
330 Patching Array JavaScript Explanation Hard
329 Longest Increasing Path in a Matrix Hard
328 Odd Even Linked List JavaScript Medium
327 Count of Range Sum JavaScript Hard
326 Power of Three JavaScript Explanation Easy
325 Maximum Size Subarray Sum Equals k 📘 Medium
324 Wiggle Sort II Medium
323 Number of Connected Components in an Undirected Graph 📘 Medium
322 Coin Change JavaScript Explanation Medium
321 Create Maximum Number Hard
320 Generalized Abbreviation 📘 Medium
319 Bulb Switcher JavaScript Explanation Medium
318 Maximum Product of Word Lengths JavaScript Medium
317 Shortest Distance from All Buildings 📘 Hard
316 Remove Duplicate Letters Hard
315 Count of Smaller Numbers After Self JavaScript Explanation Hard
314 Binary Tree Vertical Order Traversal 📘 Medium
313 Super Ugly Number JavaScript Explanation Medium
312 Burst Balloons Hard
311 Sparse Matrix Multiplication 📘 Medium
310 Minimum Height Trees Medium
309 Best Time to Buy and Sell Stock with Cooldown JavaScript Explanation Medium
308 Range Sum Query 2D - Mutable 📘 Hard
307 Range Sum Query - Mutable JavaScript Explanation Medium
306 Additive Number JavaScript Explanation Medium
305 Number of Islands II 📘 Hard
304 Range Sum Query 2D - Immutable JavaScript Explanation Medium
303 Range Sum Query - Immutable JavaScript Explanation Easy
302 Smallest Rectangle Enclosing Black Pixels 📘 Hard
301 Remove Invalid Parentheses Hard
300 Longest Increasing Subsequence JavaScript Explanation Medium
299 Bulls and Cows JavaScript Explanation Medium
298 Binary Tree Longest Consecutive Sequence 📘 Medium
297 Serialize and Deserialize Binary Tree Hard
296 Best Meeting Point 📘 Hard
295 Find Median from Data Stream JavaScript Explanation Hard
294 Flip Game II 📘 Medium
293 Flip Game 📘 Easy
292 Nim Game JavaScript Explanation Easy
291 Word Pattern II 📘 Hard
290 Word Pattern JavaScript Explanation Easy
289 Game of Life JavaScript Explanation Medium
288 Unique Word Abbreviation 📘 Medium
287 Find the Duplicate Number JavaScript Explanation Medium
286 Walls and Gates 📘 Medium
285 Inorder Successor in BST 📘 Medium
284 Peeking Iterator Medium
283 Move Zeroes JavaScript Explanation Easy
282 Expression Add Operators Hard
281 Zigzag Iterator 📘 Medium
280 Wiggle Sort 📘 Medium
279 Perfect Squares JavaScript Explanation Medium
278 First Bad Version JavaScript Explanation Easy
277 Find the Celebrity 📘 Medium
276 Paint Fence 📘 Easy
275 H-Index II JavaScript Explanation Medium
274 H-Index JavaScript Explanation Medium
273 Integer to English Words Hard
272 Closest Binary Search Tree Value II 📘 Hard
271 Encode and Decode Strings 📘 Medium
270 Closest Binary Search Tree Value 📘 Easy
269 Alien Dictionary 📘 Hard
268 Missing Number JavaScript Explanation Easy
267 Palindrome Permutation II 📘 Medium
266 Palindrome Permutation 📘 Easy
265 Paint House II 📘 Hard
264 Ugly Number II JavaScript Explanation Medium
263 Ugly Number JavaScript Explanation Easy
261 Graph Valid Tree 📘 Medium
260 Single Number III JavaScript Medium
259 3Sum Smaller 📘 Medium
258 Add Digits JavaScript Explanation Easy
257 Binary Tree Paths JavaScript Explanation Easy
256 Paint House 📘 Easy
255 Verify Preorder Sequence in Binary Search Tree 📘 Medium
254 Factor Combinations 📘 Medium
253 Meeting Rooms II 📘 Medium
252 Meeting Rooms 📘 Easy
251 Flatten 2D Vector 📘 Medium
250 Count Univalue Subtrees 📘 Medium
249 Group Shifted Strings 📘 Medium
248 Strobogrammatic Number III 📘 Hard
247 Strobogrammatic Number II 📘 Medium
246 Strobogrammatic Number 📘 Easy
245 Shortest Word Distance III 📘 Medium
244 Shortest Word Distance II 📘 Medium
243 Shortest Word Distance 📘 Easy
242 Valid Anagram JavaScript Explanation Easy
241 Different Ways to Add Parentheses JavaScript Explanation Medium
240 Search a 2D Matrix II JavaScript Explanation Medium
239 Sliding Window Maximum Hard
238 Product of Array Except Self JavaScript Medium
237 Delete Node in a Linked List JavaScript Explanation Easy
236 Lowest Common Ancestor of a Binary Tree JavaScript Explanation Medium
235 Lowest Common Ancestor of a Binary Search Tree JavaScript Easy
234 Palindrome Linked List JavaScript Explanation Easy
233 Number of Digit One JavaScript Hard
232 Implement Queue using Stacks JavaScript Explanation Easy
231 Power of Two JavaScript Explanation Easy
230 Kth Smallest Element in a BST JavaScript Explanation Medium
229 Majority Element II JavaScript Medium
228 Summary Ranges JavaScript Explanation Medium
227 Basic Calculator II JavaScript Medium
226 Invert Binary Tree JavaScript Explanation Easy
225 Implement Stack using Queues JavaScript Explanation Easy
224 Basic Calculator JavaScript Explanation Hard
223 Rectangle Area JavaScript Explanation Medium
222 Count Complete Tree Nodes JavaScript Explanation Medium
221 Maximal Square JavaScript Medium
220 Contains Duplicate III JavaScript Medium
219 Contains Duplicate II JavaScript Easy
218 The Skyline Problem Hard
217 Contains Duplicate JavaScript Easy
216 Combination Sum III JavaScript Medium
215 Kth Largest Element in an Array JavaScript Explanation Medium
214 Shortest Palindrome JavaScript Explanation Hard
213 House Robber II JavaScript Medium
212 Word Search II Hard
211 Add and Search Word - Data structure design JavaScript Explanation Medium
210 Course Schedule II JavaScript Medium
209 Minimum Size Subarray Sum JavaScript Medium
208 Implement Trie (Prefix Tree) JavaScript Medium
207 Course Schedule JavaScript Explanation Medium
206 Reverse Linked List JavaScript Easy
205 Isomorphic Strings JavaScript Explanation Easy
204 Count Primes JavaScript Explanation Easy
203 Remove Linked List Elements JavaScript Explanation Easy
202 Happy Number JavaScript Explanation Easy
201 Bitwise AND of Numbers Range JavaScript Medium
200 Number of Islands JavaScript Explanation 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 Explanation Easy
189 Rotate Array JavaScript Explanation Easy
188 Best Time to Buy and Sell Stock IV Hard
187 Repeated DNA Sequences JavaScript Explanation Medium
186 Reverse Words in a String II 📘 Medium
179 Largest Number JavaScript Explanation Medium
174 Dungeon Game Hard
173 Binary Search Tree Iterator Medium
172 Factorial Trailing Zeroes JavaScript Explanation Easy
171 Excel Sheet Column Number JavaScript Explanation Easy
170 Two Sum III - Data structure design 📘 Easy
169 Majority Element JavaScript Explanation Easy
168 Excel Sheet Column Title JavaScript Explanation Easy
167 Two Sum II - Input array is sorted JavaScript Easy
166 Fraction to Recurring Decimal JavaScript Explanation Medium
165 Compare Version Numbers JavaScript Explanation Medium
164 Maximum Gap JavaScript Explanation Hard
163 Missing Ranges 📘 Medium
162 Find Peak Element JavaScript Explanation Medium
161 One Edit Distance 📘 Medium
160 Intersection of Two Linked Lists JavaScript Easy
159 Longest Substring with At Most Two Distinct Characters 📘 Hard
158 Read N Characters Given Read4 II - Call multiple times 📘 Hard
157 Read N Characters Given Read4 📘 Easy
156 Binary Tree Upside Down 📘 Medium
155 Min Stack Easy
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 Explanation Medium
150 Evaluate Reverse Polish Notation Medium
149 Max Points on a Line Hard
148 Sort List JavaScript Explanation Medium
147 Insertion Sort List JavaScript Medium
146 LRU Cache JavaScript Explanation Hard
145 Binary Tree Postorder Traversal JavaScript Hard
144 Binary Tree Preorder Traversal JavaScript Medium
143 Reorder List JavaScript Medium
142 Linked List Cycle II JavaScript Medium
141 Linked List Cycle JavaScript Explanation Easy
140 Word Break II Hard
139 Word Break JavaScript Medium
138 Copy List with Random Pointer JavaScript Medium
137 Single Number II JavaScript Medium
136 Single Number JavaScript Easy
135 Candy Hard
134 Gas Station Medium
133 Clone Graph JavaScript Medium
132 Palindrome Partitioning II JavaScript Explanation Hard
131 Palindrome Partitioning JavaScript Explanation Medium
130 Surrounded Regions Medium
129 Sum Root to Leaf Numbers JavaScript Medium
128 Longest Consecutive Sequence JavaScript Hard
127 Word Ladder Medium
126 Word Ladder II Hard
125 Valid Palindrome JavaScript Explanation Easy
124 Binary Tree Maximum Path Sum Hard
123 Best Time to Buy and Sell Stock III JavaScript Hard
122 Best Time to Buy and Sell Stock II JavaScript Explanation Easy
121 Best Time to Buy and Sell Stock JavaScript Explanation Easy
120 Triangle JavaScript Medium
119 Pascal's Triangle II JavaScript Explanation Easy
118 Pascal's Triangle JavaScript Explanation Easy
117 Populating Next Right Pointers in Each Node II JavaScript Medium
116 Populating Next Right Pointers in Each Node JavaScript Medium
115 Distinct Subsequences Hard
114 Flatten Binary Tree to Linked List JavaScript Explanation 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
109 Convert Sorted List to Binary Search Tree JavaScript Medium
108 Convert Sorted Array to Binary Search Tree JavaScript Easy
107 Binary Tree Level Order Traversal II JavaScript Easy
106 Construct Binary Tree from Inorder and Postorder Traversal JavaScript Medium
105 Construct Binary Tree from Preorder and Inorder Traversal JavaScript Medium
104 Maximum Depth of Binary Tree JavaScript Easy
103 Binary Tree Zigzag Level Order Traversal JavaScript Medium
102 Binary Tree Level Order Traversal JavaScript Medium
101 Symmetric Tree JavaScript Easy
100 Same Tree JavaScript Easy
99 Recover Binary Search Tree Hard
98 Validate Binary Search Tree JavaScript Medium
97 Interleaving String Hard
96 Unique Binary Search Trees JavaScript Medium
95 Unique Binary Search Trees II JavaScript Medium
94 Binary Tree Inorder Traversal JavaScript Medium
93 Restore IP Addresses JavaScript Medium
92 Reverse Linked List II JavaScript Medium
91 Decode Ways JavaScript Medium
90 Subsets II JavaScript Medium
89 Gray Code JavaScript Medium
88 Merge Sorted Array JavaScript Explanation Easy
87 Scramble String Hard
86 Partition List JavaScript Explanation 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 Explanation Medium
79 Word Search JavaScript Medium
78 Subsets JavaScript Medium
77 Combinations JavaScript Medium
76 Minimum Window Substring Hard
75 Sort Colors JavaScript Explanation Medium
74 Search a 2D Matrix JavaScript Medium
73 Set Matrix Zeroes JavaScript Explanation Medium
72 Edit Distance Hard
71 Simplify Path JavaScript Medium
70 Climbing Stairs JavaScript Explanation Easy
69 Sqrt(x) JavaScript Explanation Easy
68 Text Justification Hard
67 Add Binary JavaScript Explanation Easy
66 Plus One JavaScript Explanation Easy
65 Valid Number JavaScript Explanation Hard
64 Minimum Path Sum JavaScript Medium
63 Unique Paths II JavaScript Explanation Medium
62 Unique Paths JavaScript Explanation Medium
61 Rotate List JavaScript Explanation Medium
60 Permutation Sequence JavaScript Medium
59 Spiral Matrix II JavaScript Medium
58 Length of Last Word JavaScript Explanation Easy
57 Insert Interval JavaScript Hard
56 Merge Intervals JavaScript Medium
55 Jump Game JavaScript Medium
54 Spiral Matrix JavaScript Medium
53 Maximum Subarray JavaScript Easy
52 N-Queens II JavaScript Hard
51 N-Queens JavaScript Hard
50 Pow(x, n) JavaScript Explanation Medium
49 Group Anagrams JavaScript Medium
48 Rotate Image JavaScript Medium
47 Permutations II JavaScript Medium
46 Permutations JavaScript Medium
45 Jump Game II JavaScript Hard
44 Wildcard Matching Hard
43 Multiply Strings JavaScript Medium
42 Trapping Rain Water JavaScript Hard
41 First Missing Positive JavaScript Explanation Hard
40 Combination Sum II JavaScript Medium
39 Combination Sum JavaScript Medium
38 Count and Say JavaScript Explanation Easy
37 Sudoku Solver Hard
36 Valid Sudoku JavaScript Medium
35 Search Insert Position JavaScript Explanation Easy
34 Search for a Range JavaScript Explanation Medium
33 Search in Rotated Sorted Array JavaScript Medium
32 Longest Valid Parentheses Hard
31 Next Permutation JavaScript Medium
30 Substring with Concatenation of All Words Hard
29 Divide Two Integers JavaScript Explanation Medium
28 Implement strStr() JavaScript Explanation Easy
27 Remove Element JavaScript Explanation Easy
26 Remove Duplicates from Sorted Array JavaScript Explanation Easy
25 Reverse Nodes in k-Group JavaScript Hard
24 Swap Nodes in Pairs JavaScript Explanation Medium
23 Merge k Sorted Lists JavaScript Hard
22 Generate Parentheses JavaScript Medium
21 Merge Two Sorted Lists JavaScript Explanation Easy
20 Valid Parentheses JavaScript Explanation Easy
19 Remove Nth Node From End of List JavaScript Explanation Medium
18 4Sum JavaScript Medium
17 Letter Combinations of a Phone Number JavaScript Explanation Medium
16 3Sum Closest JavaScript Medium
15 3Sum JavaScript Medium
14 Longest Common Prefix JavaScript Explanation Easy
13 Roman to Integer JavaScript Easy
12 Integer to Roman JavaScript Medium
11 Container With Most Water JavaScript Medium
10 Regular Expression Matching JavaScript Explanation Hard
9 Palindrome Number JavaScript Explanation Easy
8 String to Integer (atoi) JavaScript Medium
7 Reverse Integer JavaScript Explanation Easy
6 ZigZag Conversion JavaScript Explanation Medium
5 Longest Palindromic Substring JavaScript Explanation Medium
4 Median of Two Sorted Arrays JavaScript Hard
3 Longest Substring Without Repeating Characters JavaScript Medium
2 Add Two Numbers JavaScript Medium
1 Two Sum JavaScript Explanation Easy

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