状态
#
解题报告
分类
难度
684 Redundant Connection Algorithms Medium
683 K Empty Slots Algorithms Hard
682 Baseball Game Algorithms Easy
681 Next Closest Time Algorithms Medium
680 Valid Palindrome II Algorithms Easy
679 24 Game Algorithms Hard
678 Valid Parenthesis String Algorithms Medium
677 Map Sum Pairs Algorithms Medium
676 Implement Magic Dictionary Algorithms Medium
675 Cut Off Trees for Golf Event Algorithms Hard
674 Longest Continuous Increasing Subsequence Algorithms Easy
673 Number of Longest Increasing Subsequence Algorithms Medium
672 Bulb Switcher II Algorithms Medium
671 Second Minimum Node In a Binary Tree Algorithms Easy
670 Maximum Swap Algorithms Medium
669 Trim a Binary Search Tree Algorithms Easy
668 Kth Smallest Number in Multiplication Table Algorithms Hard
667 Beautiful Arrangement II Algorithms Medium
666 Path Sum IV Algorithms Medium
665 Non-decreasing Array Algorithms Easy
664 Strange Printer Algorithms Hard
663 Equal Tree Partition Algorithms Medium
662 Maximum Width of Binary Tree Algorithms Medium
661 Image Smoother Algorithms Easy
660 Remove 9 Algorithms Medium
659 Split Array into Consecutive Subsequences Algorithms Medium
658 Find K Closest Elements Algorithms Medium
657 Judge Route Circle Algorithms Easy
656 Coin Path Algorithms Hard
655 Print Binary Tree Algorithms Medium
654 Maximum Binary Tree Algorithms Medium
653 Two Sum IV - Input is a BST Algorithms Easy
652 Find Duplicate Subtrees Algorithms Medium
651 4 Keys Keyboard Algorithms Medium
650 2 Keys Keyboard Algorithms Medium
649 Dota2 Senate Algorithms Medium
648 Replace Words Algorithms Hard
647 Palindromic Substrings Algorithms Medium
646 Maximum Length of Pair Chain Algorithms Medium
645 Set Mismatch Algorithms Easy
644 Maximum Average Subarray II Algorithms Hard
643 Maximum Average Subarray I Algorithms Easy
642 Design Search Autocomplete System Algorithms Hard
640 Solve the Equation Algorithms Medium
639 Decode Ways II Algorithms Hard
638 Shopping Offers Algorithms Medium
637 Average of Levels in Binary Tree Algorithms Easy
636 Exclusive Time of Functions Algorithms Medium
635 Design Log Storage System Algorithms Medium
634 Find the Derangement of An Array Algorithms Medium
633 Sum of Square Numbers Algorithms Easy
632 Smallest Range Algorithms Hard
631 Design Excel Sum Formula Algorithms Hard
630 Course Schedule III Algorithms Medium
629 K Inverse Pairs Array Algorithms Medium
628 Maximum Product of Three Numbers Algorithms Easy
625 Minimum Factorization Algorithms Medium
624 Maximum Distance in Arrays Algorithms Easy
623 Add One Row to Tree Algorithms Medium
621 Task Scheduler Algorithms Medium
617 Merge Two Binary Trees Algorithms Easy
616 Add Bold Tag in String Algorithms Medium
611 Valid Triangle Number Algorithms Medium
609 Find Duplicate File in System Algorithms Medium
606 Construct String from Binary Tree Algorithms Easy
605 Can Place Flowers Algorithms Easy
604 Design Compressed String Iterator Algorithms Easy
600 Non-negative Integers without Consecutive Ones Algorithms Hard
599 Minimum Index Sum of Two Lists Algorithms Easy
598 Range Addition II Algorithms Easy
594 Longest Harmonious Subsequence Algorithms Easy
593 Valid Square Algorithms Medium
592 Fraction Addition and Subtraction Algorithms Medium
591 Tag Validator Algorithms Hard
588 Design In-Memory File System Algorithms Hard
587 Erect the Fence Algorithms Hard
583 Delete Operation for Two Strings Algorithms Medium
582 Kill Process Algorithms Medium
581 Shortest Unsorted Continuous Subarray Algorithms Easy
580 Count Student Number in Departments Database Medium
578 Get Highest Answer Rate Question Database Medium
577 Employee Bonus Database Easy
576 Out of Boundary Paths Algorithms Medium
575 Distribute Candies Algorithms Easy
573 Squirrel Simulation Algorithms Medium
572 Subtree of Another Tree Algorithms Easy
571 Find Median Given Frequency of Numbers Database Easy
568 Maximum Vacation Days Algorithms Hard
567 Permutation in String Algorithms Medium
566 Reshape the Matrix Algorithms Easy
565 Array Nesting Algorithms Easy
564 Find the Closest Palindrome Algorithms Hard
563 Binary Tree Tilt Algorithms Easy
562 Longest Line of Consecutive One in Matrix Algorithms Medium
561 Array Partition I Algorithms Easy
560 Subarray Sum Equals K Algorithms Medium
557 Reverse Words in a String III Algorithms Easy
556 Next Greater Element III Algorithms Medium
555 Split Assembled Strings Algorithms Medium
554 Brick Wall Algorithms Medium
553 Optimal Division Algorithms Medium
552 Student Attendance Record II Algorithms Hard
551 Student Attendance Record I Algorithms Easy
549 Binary Tree Longest Consecutive Sequence II Algorithms Medium
548 Split Array with Equal Sum Algorithms Medium
547 Friend Circles Algorithms Medium
546 Remove Boxes Algorithms Hard
545 Boundary of Binary Tree Algorithms Medium
544 Output Contest Matches Algorithms Medium
543 Diameter of Binary Tree Algorithms Easy
542 01 Matrix Algorithms Medium
541 Reverse String II Algorithms Easy
540 Single Element in a Sorted Array Draft Medium
539 Minimum Time Difference Algorithms Medium
538 Convert BST to Greater Tree Algorithms Easy
537 Complex Number Multiplication Algorithms Medium
536 Construct Binary Tree from String Algorithms Medium
533 Lonely Pixel II Algorithms Medium
532 K-diff Pairs in an Array Algorithms Easy
531 Lonely Pixel I Algorithms Medium
530 Minimum Absolute Difference in BST Algorithms Easy
529 Minesweeper Algorithms Medium
527 Word Abbreviation Algorithms Hard
526 Beautiful Arrangement Algorithms Medium
525 Contiguous Array Algorithms Medium
524 Longest Word in Dictionary through Deleting Algorithms Medium
523 Continuous Subarray Sum Algorithms Medium
522 Longest Uncommon Subsequence II Algorithms Medium
521 Longest Uncommon Subsequence I Algorithms Easy
520 Detect Capital Algorithms Easy
518 Coin Change 2 Draft Medium
517 Super Washing Machines Algorithms Hard
516 Longest Palindromic Subsequence Algorithms Medium
515 Find Largest Element in Each Row Algorithms Medium
514 Freedom Trail Algorithms Hard
513 Find Left Most Element Algorithms Medium
508 Most Frequent Subtree Sum Algorithms Medium
507 Perfect Number Algorithms Easy
506 Relative Ranks Algorithms Easy
504 Base 7 Algorithms Easy
503 Next Greater Element II Algorithms Medium
502 IPO Algorithms Hard
501 Find Mode in Binary Tree Algorithms Easy
500 Keyboard Row Algorithms Easy
499 The Maze II Algorithms Hard
498 Diagonal Traverse Algorithms Hard
496 Next Greater Element I Algorithms Easy
495 Teemo Attacking Algorithms Medium
494 Target sum Algorithms Medium
493 Reverse Pairs Algorithms Hard
492 Construct the rectangle Algorithms Easy
491 Increasing Subsequences Algorithms Medium
488 Zuma Game Algorithms Hard
487 Max Consecutive Ones II Algorithms Medium
486 Predict the Winner Algorithms Medium
485 Max Consecutive Ones Algorithms Easy
484 Find Permutation Algorithms Medium
483 Smallest Good Base Algorithms Hard
482 License Key Formatting Algorithms Medium
481 Magical String Algorithms Medium
480 Sliding Window Median Algorithms Hard
479 Largest Palindrome Product Draft Easy
477 Total Hamming Distance Algorithms Medium
476 Number Complement Algorithms Easy
475 Heaters Algorithms Easy
474 Ones and Zeroes Algorithms Medium
473 Matchsticks to Square Algorithms Medium
471 Encode String with Shortest Length Algorithms Hard
469 Convex Polygon Algorithms Medium
468 Validate IP Address Algorithms Medium
467 Unique Substrings in Wraparound String Algorithms Medium
466 Count The Repetitions Algorithms Hard
465 Optimal Account Balancing Algorithms Hard
464 Can I Win Algorithms Medium
463 Island Perimeter Algorithms Easy
462 Minimum Moves to Equal Array Elements II Algorithms Medium
461 Hamming Distance Algorithms Easy
460 LFU Cache Draft Hard
459 Repeated Substring Pattern Algorithms Easy
458 Poor Pigs Draft Easy
457 Circular Array Loop Draft Medium
456 132 Pattern Algorithms Medium
455 Assign Cookies Algorithms Easy
454 4Sum II Algorithms Medium
453 Minimum Moves to Equal Array Elements Algorithms Easy
452 Minimum Number of Arrows to Burst Balloons Algorithms Medium
451 Sort Characters By Frequency Draft Medium
450 Delete Node in a BST Draft Medium
449 Serialize and Deserialize BST Draft Medium
448 Find All Numbers Disappeared in an Array Draft Medium
447 Number of Boomerangs Algorithms Easy
446 Arithmetic Slices II - Subsequence Algorithms Hard
445 Add Two Numbers II Draft Medium
444 Sequence Reconstruction Algorithms Medium
442 Find All Duplicates in an Array Draft Medium
441 Arranging Coins Algorithms Easy
440 K-th Smallest in Lexicographical Order Algorithms Hard
439 Ternary Expression Parser Algorithms Medium
438 Find All Anagrams in a String Algorithms Easy
437 Path Sum III Algorithms Easy
436 Find Right Interval Algorithms Medium
435 Non-overlapping Intervals Algorithms Medium
434 Number of Segments in a String Algorithms Easy
433 Minimum Genetic Mutation Draft Medium
432 All O`one Data Structure Draft Hard
425 Word Squares Algorithms Hard
424 Longest Repeating Character Replacement Algorithms Medium
423 Reconstruct Original Digits from English Algorithms Easy
422 Valid Word Square Algorithms Easy
421 Maximum XOR of Two Numbers in an Array Algorithms Medium
420 Strong Password Checker Algorithms Hard
419 Battleships in a board Algorithms Medium
418 Sentence Screen Fitting Algorithms Hard
417 Pacific Atlantic Water Flow Algorithms Medium
416 Partition Equal Subset Sum Algorithms Medium
415 Add Strings Algorithms Easy
414 Third Maximum Number Algorithms Easy
413 Arithmetic Slices Algorithms Easy
412 Fizz Buzz Algorithms Easy
411 Minimum Unique Word Abbreviation Algorithms Medium
410 Split Array Largest Sum Algorithms Medium
409 Longest Palindrome Algorithms Easy
408 Valid Word Abbreviation Algorithms Easy
407 Trapping Rain Water II Algorithms Hard
406 Queue Reconstruction by Height Algorithms Medium
405 Convert a Number to Hexadecimal Algorithms Easy
404 Sum of Left Leaves Algorithms Easy
403 Frog Jump Algorithms Hard
402 Remove K Digits Algorithms Medium
401 Binary Watch Algorithms Easy
400 Nth Digit Algorithms Easy
399 Evaluate Division Algorithms Medium
398 Random Pick Index Algorithms Medium
397 Integer Replacement Algorithms Easy
396 Rotate Function Algorithms Easy
395 Longest Substring with At Least K Repeating Characters Algorithms Medium
394 Decode String Algorithms Medium
393 UTF-8 Validation Algorithms Medium
392 Is Subsequence Algorithms Medium
391 Perfect Rectangle Algorithms Hard
390 Elimination Game Algorithms Medium
389 Find the Difference Algorithms Easy
388 Longest Absolute File Path Algorithms Medium
387 First Unique Character in a String Algorithms Easy
386 Lexicographical Numbers Algorithms Medium
385 Mini Parser Algorithms Medium
384 Shuffle an Array Algorithms Easy
383 Ransom Note Algorithms Easy
382 Linked List Random Node Algorithms Medium
381 Insert Delete GetRandom O(1) - Duplicates allowed Algorithms Medium
380 Insert Delete GetRandom O(1) Algorithms Medium
378 Kth Smallest Element in a Sorted Matrix Algorithms Medium
377 Combination Sum IV Algorithms Medium
376 Wiggle Subsequence Algorithms Medium
375 Guess Number Higher or Lower II Algorithms Medium
374 Guess Number Higher or Lower Algorithms Easy
373 Find K Pairs with Smallest Sums Algorithms Medium
372 Super Pow Algorithms Medium
371 Sum of Two Integers Algorithms Easy
368 Largest Divisible Subset Algorithms Medium
367 Valid Perfect Square Algorithms Medium
365 Water and Jug Problem Algorithms Medium
363 Max Sum of Rectangle No Larger Than K Algorithms Medium
357 Count Numbers with Unique Digits Algorithms Medium
355 Design Twitter design-twitter Algorithms Hard
354 Russian Doll Envelopes Algorithms Hard
352 Data Stream as Disjoint Intervals Algorithms Hard
350 Intersection of Two Arrays II Algorithms Easy
349 Intersection of Two Arrays Algorithms Easy
347 Top K Frequent Elements Algorithms Medium
345 Reverse Vowels of a String Algorithms Easy
344 Reverse String Algorithms Easy
343 Integer Break Algorithms Medium
342 Power of Four Algorithms Easy
341 Flatten Nested List Iterator Algorithms Medium
338 Counting Bits Algorithms Medium
337 House Robber III Algorithms Medium
336 Palindrome Pairs Algorithms Hard
335 Self Crossing Algorithms Medium
334 Increasing Triplet Subsequence Algorithms Medium
332 Reconstruct Itinerary Algorithms Hard
331 Verify Preorder Serialization of a Binary Tree Algorithms Medium
330 Patching Array Algorithms Hard
329 Longest Increasing Path in a Matrix Algorithms Medium
328 Odd Even Linked List Algorithms Easy
327 Count of Range Sum Algorithms Hard
326 Power of Three Algorithms Easy
324 Wiggle Sort II Algorithms Medium
322 Coin Change Algorithms Medium
321 Create Maximum Number Algorithms Hard
319 Bulb Switcher Algorithms Medium
318 Maximum Product of Word Lengths Algorithms Medium
316 Remove Duplicate Letters Algorithms Medium
315 Count of Smaller Numbers After Self Algorithms Hard
313 Super Ugly Number Algorithms Medium
312 Burst Balloons Algorithms Medium
310 Minimum Height Trees Algorithms Medium
309 Best Time to Buy and Sell Stock with Cooldown Algorithms Medium
307 Range Sum Query - Mutable Algorithms Medium
306 Additive Number Algorithms Medium
304 Range Sum Query 2D - Immutable Algorithms Medium
303 Range Sum Query - Immutable Algorithms Easy
301 Remove Invalid Parentheses Algorithms Medium
300 Longest Increasing Subsequence Algorithms Medium
299 Bulls and Cows Algorithms Easy
297 Serialize and Deserialize Binary Tree Algorithms Medium
295 Find Median from Data Stream Algorithms Hard
292 Nim Game Algorithms Easy
290 Word Pattern Algorithms Easy
289 Game of Life Algorithms Medium
287 Find the Duplicate Number Algorithms Hard
284 Peeking Iterator peeking-iterator Algorithms Medium
283 Move Zeroes Algorithms Easy
282 Expression Add Operators Algorithms Hard
279 Perfect Squares Algorithms Medium
278 First Bad Version Algorithms Easy
275 H-Index II Algorithms Medium
274 H-Index Algorithms Medium
273 Integer to English Words Algorithms Medium
268 Missing Number Algorithms Medium
264 Ugly Number II Algorithms Medium
263 Ugly Number Algorithms Easy
262 Trips and Users Database Hard
260 Single Number III Algorithms Medium
258 Add Digits Algorithms Easy
257 Binary Tree Paths Algorithms Easy
242 Valid Anagram Algorithms Easy
241 Different Ways to Add Parentheses Algorithms Medium
240 Search a 2D Matrix II Algorithms Medium
239 Sliding Window Maximum Algorithms Hard
238 Product of Array Except Self Algorithms Medium
237 Delete Node in a Linked List Algorithms Easy
236 Lowest Common Ancestor of a Binary Tree Algorithms Medium
235 Lowest Common Ancestor of a Binary Search Tree Algorithms Easy
234 Palindrome Linked List Algorithms Easy
233 Number of Digit One Algorithms Medium
232 Implement Queue using Stacks Algorithms Easy
231 Power of Two Algorithms Easy
230 Kth Smallest Element in a BST Algorithms Medium
229 Majority Element II Algorithms Medium
228 Summary Ranges Algorithms Easy
227 Basic Calculator II Algorithms Medium
226 Invert Binary Tree Algorithms Easy
225 Implement Stack using Queues Algorithms Easy
224 Basic Calculator Algorithms Medium
223 Rectangle Area Algorithms Easy
222 Count Complete Tree Nodes Algorithms Medium
221 Maximal Square Algorithms Medium
220 Contains Duplicate III Algorithms Medium
219 Contains Duplicate II Algorithms Easy
218 The Skyline Problem Algorithms Hard
217 Contains Duplicate Algorithms Easy
216 Combination Sum III Algorithms Medium
215 Kth Largest Element in an Array Algorithms Medium
214 Shortest Palindrome Algorithms Hard
213 House Robber II Algorithms Medium
212 Word Search II Algorithms Hard
211 Add and Search Word - Data structure design Algorithms Medium
210 Course Schedule II Algorithms Medium
209 Minimum Size Subarray Sum Algorithms Medium
208 Implement Trie (Prefix Tree) Algorithms Medium
207 Course Schedule Algorithms Medium
206 Reverse Linked List Algorithms Easy
205 Isomorphic Strings Algorithms Easy
204 Count Primes Algorithms Easy
203 Remove Linked List Elements Algorithms Easy
202 Happy Number Algorithms Easy
201 Bitwise AND of Numbers Range Algorithms Medium
200 Number of Islands Algorithms Medium
199 Binary Tree Right Side View Algorithms Medium
198 House Robber Algorithms Easy
197 Rising Temperature Database Easy
196 Delete Duplicate Emails Database Easy
195 Tenth Line Shell Easy
194 Transpose File Shell Medium
193 Valid Phone Numbers Shell Easy
192 Word Frequency Shell Medium
191 Number of 1 Bits Algorithms Easy
190 Reverse Bits Algorithms Easy
189 Rotate Array Algorithms Easy
188 Best Time to Buy and Sell Stock IV Algorithms Hard
187 Repeated DNA Sequences Algorithms Medium
185 Department Top Three Salaries Database Hard
184 Department Highest Salary Database Medium
183 Customers Who Never Order Database Easy
182 Duplicate Emails Database Easy
181 Employees Earning More Than Their Managers Database Easy
180 Consecutive Numbers Database Medium
179 Largest Number Algorithms Medium
178 Rank Scores Database Medium
177 Nth Highest Salary Database Medium
176 Second Highest Salary Database Easy
175 Combine Two Tables Database Easy
174 Dungeon Game Algorithms Hard
173 Binary Search Tree Iterator Algorithms Medium
172 Factorial Trailing Zeroes Algorithms Easy
171 Excel Sheet Column Number Algorithms Easy
169 Majority Element Algorithms Easy
168 Excel Sheet Column Title Algorithms Easy
166 Fraction to Recurring Decimal Algorithms Medium
165 Compare Version Numbers Algorithms Easy
164 Maximum Gap Algorithms Hard
162 Find Peak Element Algorithms Medium
160 Intersection of Two Linked Lists Algorithms Easy
155 Min Stack Algorithms Easy
154 Find Minimum in Rotated Sorted Array II Algorithms Hard
153 Find Minimum in Rotated Sorted Array Algorithms Medium
152 Maximum Product Subarray Algorithms Medium
151 Reverse Words in a String Algorithms Medium
150 Evaluate Reverse Polish Notation Algorithms Medium
149 Max Points on a Line Algorithms Easy
148 Sort List Algorithms Medium
147 Insertion Sort List Algorithms Medium
146 LRU Cache Algorithms Hard
145 Binary Tree Postorder Traversal Algorithms Hard
144 Binary Tree Preorder Traversal Algorithms Medium
143 Reorder List Algorithms Medium
142 Linked List Cycle II Algorithms Medium
141 Linked List Cycle Algorithms Medium
140 Word Break II Algorithms Hard
139 Word Break Algorithms Medium
138 Copy List with Random Pointer Algorithms Hard
136 Single Number Algorithms Medium
135 Candy Algorithms Hard
134 Gas Station Algorithms Medium
133 Clone Graph Algorithms Medium
129 Sum Root to Leaf Numbers Algorithms Medium
127 Word Ladder Algorithms Medium
124 Binary Tree Maximum Path Sum Algorithms Hard
122 Best Time to Buy and Sell Stock II Algorithms Medium
114 Flatten Binary Tree to Linked List Algorithms Medium
111 Minimum Depth of Binary Tree Algorithms Easy
100 Same Tree Algorithms Easy
94 Binary Tree Inorder Traversal Algorithms Medium
92 Reverse Linked List II Algorithms Medium
79 Word Search Algorithms Medium
70 Climbing Stairs Algorithms Easy
69 Sqrt(x) Algorithms Medium
62 Unique Paths Algorithms Medium
49 Anagrams Algorithms Medium
46 Permutations Algorithms Medium
41 First Missing Positive Algorithms Hard
31 Next Permutation Algorithms Medium
30 Substring with Concatenation of All Words Algorithms Hard
8 String to Integer (atoi) Algorithms Easy
6 ZigZag Conversion Algorithms Easy
4 Median of Two Sorted Arrays Algorithms Hard
3 Longest Substring Without Repeating Characters Algorithms Medium
2 Add Two Numbers Algorithms Medium
1 Two Sum Algorithms Medium