LeetCode All in One 题目讲解汇总(持续更新中...)
原文地址：https://www.cnblogs.com/grandyang/p/4606334.html
终于将LeetCode的大部分题刷完了，真是漫长的第一遍啊，估计很多题都忘的差不多了，这次开个题目汇总贴，并附上每道题目的解题连接，方便之后查阅吧~
如果各位看官们，大神们发现了任何错误，或是代码无法通过OJ，或是有更好的解法，或是有任何疑问，意见和建议的话，请一定要在对应的帖子下面评论区留言告知博主啊（如果不方便注册博客园的话，可以下载下文提到的APP，在Feedback中给博主发邮件交流哈），同时也请大家踊跃地，大量地，盲目地提供各个题目的follow up一起讨论哈，多谢多谢，祝大家刷得愉快，刷得精彩，刷出美好未来～
博主制作了一款iOS的应用"Leetcode Meet Me"，里面有Leetcode上所有的题目，并且贴上了博主的解法，随时随地都能看啊，相当方便，而且无网状态下也能看哦～目前只支持iPhone和iPad，直接在App Store搜"Leetcode Meet Me"就可以找到，关于本app有任何的feedback请直接在本帖的评论区留言帮助博主改进，demo展示请参见帖子的底部～ （同时征安卓大神帮忙制作安卓版的应用）。
同时请大家关注博主的微信公众号【刷尽天下】，可以通过搜索公众号【shua2sum】来添加，或者扫右边侧栏或者帖子底部的二维码关注，使用方法也请参见本帖底部。
喜欢本博客的朋友们可以点击右边的浮窗或者帖子底部的二维码进行打赏，不管大家是物质打赏(比如扫码发红包，大家打赏时请留下微信号哦，可以跟博主加为好友哈，可以通过在付款方留言中留下你的微信号，或者在博客中通过站内信发来你的微信号～)，还是精神打赏(留言和点赞)，博主都感激万分，这也是博主一直坚持下去的动力～
| 880 | Decoded String at Index | 23.00% | Medium |
| 879 | Profitable Schemes | 36.20% | Hard |
| 878 | Nth Magical Number | 25.40% | Hard |
| 877 | Stone Game | 61.10% | Medium |
| 876 | Middle of the Linked List | 63.80% | Easy |
| 875 | Koko Eating Bananas | 45.90% | Medium |
| 874 | Walking Robot Simulation | 31.70% | Easy |
| 873 | Length of Longest Fibonacci Subsequence | 46.00% | Medium |
| 872 | Leaf-Similar Trees | 63.10% | Easy |
| 871 | Minimum Number of Refueling Stops | 28.70% | Hard |
| 870 | Advantage Shuffle | 42.20% | Medium |
| 869 | Reordered Power of 2 | 50.60% | Medium |
| 868 | Binary Gap | 59.30% | Easy |
| 867 | Transpose Matrix | 63.90% | Easy |
| 866 | Prime Palindrome | 20.00% | Medium |
| 865 | Smallest Subtree with all the Deepest Nodes | 55.40% | Medium |
| 864 | Shortest Path to Get All Keys | 35.70% | Hard |
| 863 | All Nodes Distance K in Binary Tree | 46.80% | Medium |
| 862 | Shortest Subarray with Sum at Least K | 22.00% | Hard |
| 861 | Score After Flipping Matrix | 69.30% | Medium |
| 860 | Lemonade Change | 50.20% | Easy |
| 859 | Buddy Strings | 27.60% | Easy |
| 858 | Mirror Reflection | 52.00% | Medium |
| 857 | Minimum Cost to Hire K Workers | 47.30% | Hard |
| 856 | Score of Parentheses | 55.90% | Medium |
| 855 | Exam Room | 38.10% | Medium |
| 854 | K-Similar Strings | 33.20% | Hard |
| 853 | Car Fleet | 39.30% | Medium |
| 852 | Peak Index in a Mountain Array | 68.50% | Easy |
| 851 | Loud and Rich | 47.40% | Medium |
| 850 | Rectangle Area II | 44.00% | Hard |
| 849 | Maximize Distance to Closest Person | 40.40% | Easy |
| 848 | Shifting Letters | 39.90% | Medium |
| 847 | Shortest Path Visiting All Nodes | 45.90% | Hard |
| 846 | Hand of Straights | 48.60% | Medium |
| 845 | Longest Mountain in Array | 34.00% | Medium |
| 844 | Backspace String Compare | 45.50% | Easy |
| 843 | Guess the Word | 42.60% | Hard |
| 842 | Split Array into Fibonacci Sequence | 34.60% | Medium |
| 841 | Keys and Rooms | 59.70% | Medium |
| 840 | Magic Squares In Grid | 35.10% | Easy |
| 839 | Similar String Groups | 33.50% | Hard |
| 838 | Push Dominoes | 42.80% | Medium |
| 837 | New 21 Game | 29.50% | Medium |
| 836 | Rectangle Overlap | 45.50% | Easy |
| 835 | Image Overlap | 50.30% | Medium |
| 834 | Sum of Distances in Tree | 38.10% | Hard |
| 833 | Find And Replace in String | 44.50% | Medium |
| 832 | Flipping an Image | 71.30% | Easy |
| 831 | Masking Personal Information | 41.50% | Medium |
| 830 | Positions of Large Groups | 47.40% | Easy |
| 829 | Consecutive Numbers Sum | 32.10% | Hard |
| 828 | Unique Letter String | 38.10% | Hard |
| 827 | Making A Large Island | 42.10% | Hard |
| 826 | Most Profit Assigning Work | 34.70% | Medium |
| 825 | Friends Of Appropriate Ages | 35.00% | Medium |
| 824 | Goat Latin | 56.70% | Easy |
| 823 | Binary Trees With Factors | 31.50% | Medium |
| 822 | Card Flipping Game | 39.70% | Medium |
| 821 | Shortest Distance to a Character | 62.60% | Easy |
| 820 | Short Encoding of Words | 46.00% | Medium |
| 819 | Most Common Word | 41.50% | Easy |
| 818 | Race Car | 34.00% | Hard |
| 817 | Linked List Components | 51.90% | Medium |
| 816 | Ambiguous Coordinates | 42.40% | Medium |
| 815 | Bus Routes | 36.10% | Hard |
| 814 | Binary Tree Pruning | 68.30% | Medium |
| 813 | Largest Sum of Averages | 42.40% | Medium |
| 812 | Largest Triangle Area | 53.80% | Easy |
| 811 | Subdomain Visit Count | 61.50% | Easy |
| 810 | Chalkboard XOR Game | 41.90% | Hard |
| 809 | Expressive Words | 39.50% | Medium |
| 808 | Soup Servings | 33.60% | Medium |
| 807 | Max Increase to Keep City Skyline | 79.60% | Medium |
| 806 | Number of Lines To Write String | 62.10% | Easy |
| 805 | Split Array With Same Average | 21.00% | Hard |
| 804 | Unique Morse Code Words | 71.30% | Easy |
| 803 | Bricks Falling When Hit | 22.90% | Hard |
| 802 | Find Eventual Safe States | 39.20% | Medium |
| 801 | Minimum Swaps To Make Sequences Increasing | 31.00% | Medium |
| 800 | Similar RGB Color $ | 54.50% | Easy |
| 799 | Champagne Tower | 29.90% | Medium |
| 798 | Smallest Rotation with Highest Score | 34.30% | Hard |
| 797 | All Paths From Source to Target | 67.40% | Medium |
| 796 | Rotate String | 49.60% | Easy |
| 795 | Number of Subarrays with Bounded Maximum | 41.60% | Medium |
| 794 | Valid Tic-Tac-Toe State | 27.80% | Medium |
| 793 | Preimage Size of Factorial Zeroes Function | 40.80% | Hard |
| 792 | Number of Matching Subsequences | 37.30% | Medium |
| 791 | Custom Sort String | 59.40% | Medium |
| 790 | Domino and Tromino Tiling | 32.80% | Medium |
| 789 | Escape The Ghosts | 51.00% | Medium |
| 788 | Rotated Digits | 51.00% | Easy |
| 787 | Cheapest Flights Within K Stops | 29.90% | Medium |
| 786 | K-th Smallest Prime Fraction | 32.50% | Hard |
| 785 | Is Graph Bipartite? | 38.50% | Medium |
| 784 | Letter Case Permutation | 53.00% | Easy |
| 783 | Minimum Distance Between BST Nodes | 47.80% | Easy |
| 782 | Transform to Chessboard | 37.50% | Hard |
| 781 | Rabbits in Forest | 49.80% | Medium |
| 780 | Reaching Points | 23.90% | Hard |
| 779 | K-th Symbol in Grammar | 37.30% | Medium |
| 778 | Swim in Rising Water | 44.60% | Hard |
| 777 | Swap Adjacent in LR String | 28.90% | Medium |
| 776 | Split BST $ | 49.90% | Medium |
| 775 | Global and Local Inversions | 33.60% | Medium |
| 774 | Minimize Max Distance to Gas Station $ | 32.80% | Hard |
| 773 | Sliding Puzzle | 46.50% | Hard |
| 772 | Basic Calculator III $ | 40.10% | Hard |
| 771 | Jewels and Stones | 81.90% | Easy |
| 770 | Basic Calculator IV | 42.10% | Hard |
| 769 | Max Chunks To Make Sorted | 48.00% | Medium |
| 768 | Max Chunks To Make Sorted II | 43.20% | Hard |
| 767 | Reorganize String | 36.50% | Medium |
| 766 | Toeplitz Matrix | 57.90% | Easy |
| 765 | Couples Holding Hands | 48.50% | Hard |
| 764 | Largest Plus Sign | 39.20% | Medium |
| 763 | Partition Labels | 64.10% | Medium |
| 762 | Prime Number of Set Bits in Binary Representation | 55.00% | Easy |
| 761 | Special Binary String | 41.00% | Hard |
| 760 | Find Anagram Mappings $ | 75.60% | Easy |
| 759 | Employee Free Time $ | 51.90% | Hard |
| 758 | Bold Words in String $ | 37.90% | Easy |
| 757 | Set Intersection Size At Least Two | 34.60% | Hard |
| 756 | Pyramid Transition Matrix | 45.50% | Medium |
| 755 | Pour Water $ | 34.00% | Medium |
| 754 | Reach a Number | 26.10% | Medium |
| 753 | Cracking the Safe | 39.70% | Hard |
| 752 | Open the Lock | 38.20% | Medium |
| 751 | IP to CIDR $ | 54.80% | Easy |
| 750 | Number Of Corner Rectangles $ | 51.00% | Medium |
| 749 | Contain Virus | 39.60% | Hard |
| 748 | Shortest Completing Word | 53.50% | Medium |
| 747 | Largest Number At Least Twice of Others | 42.60% | Easy |
| 746 | Min Cost Climbing Stairs | 43.60% | Easy |
| 745 | Prefix and Suffix Search | 24.50% | Hard |
| 744 | Find Smallest Letter Greater Than Target | 45.30% | Easy |
| 743 | Network Delay Time | 34.30% | Medium |
| 742 | Closest Leaf in a Binary Tree $ | 33.20% | Medium |
| 741 | Cherry Pickup | 22.50% | Hard |
| 740 | Delete and Earn | 42.60% | Medium |
| 739 | Daily Temperatures | 53.50% | Medium |
| 738 | Monotone Increasing Digits | 41.80% | Medium |
| 737 | Sentence Similarity II $ | 41.20% | Medium |
| 736 | Parse Lisp Expression | 42.00% | Hard |
| 735 | Asteroid Collision | 37.60% | Medium |
| 734 | Sentence Similarity $ | 38.60% | Easy |
| 733 | Flood Fill | 49.30% | Easy |
| 732 | My Calendar III | 51.30% | Hard |
| 731 | My Calendar II | 35.00% | Medium |
| 730 | Count Different Palindromic Subsequences | 32.40% | Hard |
| 729 | My Calendar I | 40.10% | Medium |
| 728 | Self Dividing Numbers | 68.50% | Easy |
| 727 | Minimum Window Subsequence | 30.10% | Hard |
| 726 | Number of Atoms | 45.00% | Hard |
| 725 | Split Linked List in Parts | 50.00% | Medium |
| 724 | Find Pivot Index | 41.00% | Easy |
| 723 | Candy Crush $ | 56.10% | Medium |
| 722 | Remove Comments | 26.30% | Medium |
| 721 | Accounts Merge | 29.60% | Medium |
| 720 | Longest Word in Dictionary | 40.60% | Easy |
| 719 | Find K-th Smallest Pair Distance | 26.10% | Hard |
| 718 | Maximum Length of Repeated Subarray | 39.90% | Medium |
| 717 | 1-bit and 2-bit Characters | 50.90% | Easy |
| 716 | Max Stack $ | 35.50% | Hard |
| 715 | Range Module | 31.00% | Hard |
| 714 | Best Time to Buy and Sell Stock with Transaction Fee | 41.60% | Medium |
| 713 | Subarray Product Less Than K | 32.90% | Medium |
| 712 | Minimum ASCII Delete Sum for Two Strings | 50.90% | Medium |
| 711 | Number of Distinct Islands II $ | 39.40% | Hard |
| 710 | Random Pick with Blacklist | 29.80% | Hard |
| 709 | To Lower Case | 74.50% | Easy |
| 708 | Insert into a Cyclic Sorted List $ | 25.50% | Medium |
| 707 | Design Linked List | 19.10% | Easy |
| 706 | Design HashMap | 49.10% | Easy |
| 705 | Design HashSet | 43.60% | Easy |
| 704 | Binary Search | 40.10% | Easy |
| 703 | Kth Largest Element in a Stream | 39.60% | Easy |
| 702 | Search in a Sorted Array of Unknown Size | 43.00% | Medium |
| 701 | Insert into a Binary Search Tree | 67.90% | Medium |
| 700 | Search in a Binary Search Tree | 62.70% | Easy |
| 699 | Falling Squares | 36.80% | Hard |
| 698 | Partition to K Equal Sum Subsets | 35.60% | Medium |
| 697 | Degree of an Array | 47.90% | Easy |
| 696 | Count Binary Substrings | 51.90% | Easy |
| 695 | Max Area of Island | 53.30% | Easy |
| 694 | Number of Distinct Islands $ | 43.90% | Medium |
| 693 | Binary Number with Alternating Bits | 54.20% | Easy |
| 692 | Top K Frequent Words | 41.70% | Medium |
| 691 | Stickers to Spell Word | 32.30% | Hard |
| 690 | Employee Importance | 53.60% | Easy |
| 689 | Maximum Sum of 3 Non-Overlapping Subarrays | 41.70% | Hard |
| 688 | Knight Probability in Chessboard | 38.90% | Medium |
| 687 | Longest Univalue Path | 32.90% | Easy |
| 686 | Repeated String Match | 31.70% | Easy |
| 685 | Redundant Connection II | 28.40% | Hard |
| 684 | Redundant Connection | 37.40% | Medium |
| 683 | K Empty Slots | 37.00% | Hard |
| 682 | Baseball Game | 58.60% | Easy |
| 681 | Next Closest Time $ | 43.00% | Medium |
| 680 | Valid Palindrome II | 31.10% | Easy |
| 679 | 24 Game | 38.30% | Hard |
| 678 | Valid Parenthesis String | 28.30% | Medium |
| 677 | Map Sum Pairs | 53.80% | Medium |
| 676 | Implement Magic Dictionary | 50.70% | Medium |
| 675 | Cut Off Trees for Golf Event | 27.20% | Hard |
| 674 | Longest Continuous Increasing Subsequence | 43.20% | Easy |
| 673 | Number of Longest Increasing Subsequence | 30.80% | Medium |
| 672 | Bulb Switcher II | 47.60% | Medium |
| 671 | Second Minimum Node In a Binary Tree | 42.30% | Easy |
| 670 | Maximum Swap | 38.40% | Medium |
| 669 | Trim a Binary Search Tree | 58.70% | Easy |
| 668 | Kth Smallest Number in Multiplication Table | 36.30% | Hard |
| 667 | Beautiful Arrangement II | 51.50% | Medium |
| 666 | Path Sum IV $ | 48.90% | Medium |
| 665 | Non-decreasing Array | 21.20% | Easy |
| 664 | Strange Printer | 31.10% | Hard |
| 663 | Equal Tree Partition $ | 36.70% | Medium |
| 662 | Maximum Width of Binary Tree | 37.00% | Medium |
| 661 | Image Smoother | 46.60% | Easy |
| 660 | Remove 9 $ | 46.10% | Hard |
| 659 | Split Array into Consecutive Subsequences | 39.40% | Medium |
| 658 | Find K Closest Elements | 36.30% | Medium |
| 657 | Judge Route Circle | 69.30% | Easy |
| 656 | Coin Path $ | 24.60% | Hard |
| 655 | Print Binary Tree | 50.80% | Medium |
| 654 | Maximum Binary Tree | 70.80% | Medium |
| 653 | Two Sum IV - Input is a BST | 50.60% | Easy |
| 652 | Find Duplicate Subtrees | 33.20% | Medium |
| 651 | 4 Keys Keyboard $ | 46.70% | Medium |
| 650 | 2 Keys Keyboard | 42.70% | Medium |
| 649 | Dota2 Senate | 35.60% | Medium |
| 648 | Replace Words | 48.40% | Medium |
| 647 | Palindromic Substrings | 55.70% | Medium |
| 646 | Maximum Length of Pair Chain | 47.40% | Medium |
| 645 | Set Mismatch | 40.40% | Easy |
| 644 | Maximum Average Subarray II $ | 20.30% | Hard |
| 643 | Maximum Average Subarray I | 38.40% | Easy |
| 642 | Design Search Autocomplete System $ | 29.40% | Hard |
| 641 | Design Circular Deque | 48.00% | Medium |
| 640 | Solve the Equation | 39.00% | Medium |
| 639 | Decode Ways II | 22.80% | Hard |
| 638 | Shopping Offers | 41.50% | Medium |
| 637 | Average of Levels in Binary Tree | 55.60% | Easy |
| 636 | Exclusive Time of Functions | 40.30% | Medium |
| 635 | Design Log Storage System $ | 47.70% | Medium |
| 634 | Find the Derangement of An Array $ | 32.70% | Medium |
| 633 | Sum of Square Numbers | 31.60% | Easy |
| 632 | Smallest Range | 42.80% | Hard |
| 631 | Design Excel Sum Formula $ | 25.60% | Hard |
| 630 | Course Schedule III | 20.50% | Medium |
| 629 | K Inverse Pairs Array | 23.90% | Hard |
| 628 | Maximum Product of Three Numbers | 45.40% | Easy |
| 627 | Swap Salary | 67.40% | Easy |
| 626 | Exchange Seats | 49.60% | Medium |
| 625 | Minimum Factorization | 29.50% | Medium |
| 624 | Maximum Distance in Arrays $ | 32.70% | Easy |
| 623 | Add One Row to Tree | 48.70% | Medium |
| 622 | Design Circular Queue | 36.60% | Medium |
| 621 | Task Scheduler | 41.40% | Medium |
| 620 | Not Boring Movies | 59.80% | Easy |
| 619 | Biggest Single Number $ | 36.60% | Easy |
| 618 | Students Report By Geography $ | 40.40% | Hard |
| 617 | Merge Two Binary Trees | 69.60% | Easy |
| 616 | Add Bold Tag in String $ | 37.30% | Medium |
| 615 | Average Salary: Departments VS Company $ | 33.00% | Hard |
| 614 | Second Degree Follower $ | 22.70% | Medium |
| 613 | Shortest Distance in a Line $ | 70.60% | Easy |
| 612 | Shortest Distance in a Plane $ | 51.00% | Medium |
| 611 | Valid Triangle Number | 38.90% | Medium |
| 610 | Triangle Judgement $ | 59.10% | Easy |
| 609 | Find Duplicate File in System | 52.50% | Medium |
| 608 | Tree Node $ | 54.60% | Medium |
| 607 | Sales Person $ | 51.10% | Easy |
| 606 | Construct String from Binary Tree | 51.80% | Easy |
| 605 | Can Place Flowers | 30.00% | Easy |
| 604 | Design Compressed String Iterator $ | 31.60% | Easy |
| 603 | Consecutive Available Seats $ | 54.50% | Easy |
| 602 | Friend Requests II: Who Has the Most Friends $ | 42.50% | Medium |
| 601 | Human Traffic of Stadium | 33.80% | Hard |
| 600 | Non-negative Integers without Consecutive Ones | 27.40% | Hard |
| 599 | Minimum Index Sum of Two Lists | 48.00% | Easy |
| 598 | Range Addition II | 48.30% | Easy |
| 597 | Friend Requests I: Overall Acceptance Rate $ | 38.40% | Easy |
| 596 | Classes More Than 5 Students | 33.40% | Easy |
| 595 | Big Countries | 72.00% | Easy |
| 594 | Longest Harmonious Subsequence | 40.00% | Easy |
| 593 | Valid Square | 39.20% | Medium |
| 592 | Fraction Addition and Subtraction | 47.00% | Medium |
| 591 | Tag Validator | 26.40% | Hard |
| 590 | N-ary Tree Postorder Traversal | 63.00% | Easy |
| 589 | N-ary Tree Preorder Traversal | 63.10% | Easy |
| 588 | Design In-Memory File System $ | 32.40% | Hard |
| 587 | Erect the Fence | 29.90% | Hard |
| 586 | Customer Placing the Largest Number of Orders $ | 62.50% | Easy |
| 585 | Investments in 2016 $ | 44.60% | Medium |
| 584 | Find Customer Referee $ | 63.60% | Easy |
| 583 | Delete Operation for Two Strings | 44.00% | Medium |
| 582 | Kill Process $ | 47.70% | Medium |
| 581 | Shortest Unsorted Continuous Subarray | 30.10% | Easy |
| 580 | Count Student Number in Departments $ | 40.00% | Medium |
| 579 | Find Cumulative Salary of an Employee $ | 30.90% | Hard |
| 578 | Get Highest Answer Rate Question $ | 33.10% | Medium |
| 577 | Employee Bonus $ | 53.80% | Easy |
| 576 | Out of Boundary Paths | 33.10% | Medium |
| 575 | Distribute Candies | 59.50% | Easy |
| 574 | Winning Candidate $ | 34.50% | Medium |
| 573 | Squirrel Simulation $ | 51.00% | Medium |
| 572 | Subtree of Another Tree | 41.00% | Easy |
| 571 | Find Median Given Frequency of Numbers $ | 44.90% | Hard |
| 570 | Managers with at Least 5 Direct Reports $ | 59.00% | Medium |
| 569 | Median Employee Salary $ | 41.60% | Hard |
| 568 | Maximum Vacation Days $ | 39.90% | Hard |
| 567 | Permutation in String | 36.30% | Medium |
| 566 | Reshape the Matrix | 59.80% | Easy |
| 565 | Array Nesting | 50.00% | Medium |
| 564 | Find the Closest Palindrome | 16.60% | Hard |
| 563 | Binary Tree Tilt | 47.00% | Easy |
| 562 | Longest Line of Consecutive One in Matrix $ | 38.80% | Medium |
| 561 | Array Partition I | 69.80% | Easy |
| 560 | Subarray Sum Equals K | 41.80% | Medium |
| 559 | Maximum Depth of N-ary Tree | 62.10% | Easy |
| 558 | Quad Tree Intersection | 36.40% | Easy |
| 557 | Reverse Words in a String III | 61.20% | Easy |
| 556 | Next Greater Element III | 27.70% | Medium |
| 555 | Split Concatenated Strings $ | 30.00% | Medium |
| 554 | Brick Wall | 42.70% | Medium |
| 553 | Optimal Division | 55.20% | Medium |
| 552 | Student Attendance Record II | 28.50% | Hard |
| 551 | Student Attendance Record I | 43.90% | Easy |
| 549 | Binary Tree Longest Consecutive Sequence II $ | 38.10% | Medium |
| 548 | Split Array with Equal Sum $ | 30.80% | Medium |
| 547 | Friend Circles | 49.00% | Medium |
| 546 | Remove Boxes | 29.60% | Hard |
| 545 | Boundary of Binary Tree $ | 29.10% | Medium |
| 544 | Output Contest Matches $ | 73.20% | Medium |
| 543 | Diameter of Binary Tree | 42.70% | Easy |
| 542 | 01 Matrix | 32.50% | Medium |
| 541 | Reverse String II | 44.40% | Easy |
| 540 | Single Element in a Sorted Array | 55.90% | Medium |
| 539 | Minimum Time Difference | 44.70% | Medium |
| 538 | Convert BST to Greater Tree | 52.70% | Medium |
| 537 | Complex Number Multiplication | 65.90% | Medium |
| 536 | Construct Binary Tree from String $ | 36.30% | Medium |
| 535 | Encode and Decode TinyURL | 76.10% | Medium |
| 534 | Design TinyURL | N/A | Medium |
| 533 | Lonely Pixel II $ | 38.90% | Medium |
| 532 | K-diff Pairs in an Array | 27.20% | Easy |
| 531 | Lonely Pixel I $ | 50.20% | Medium |
| 530 | Minimum Absolute Difference in BST | 48.00% | Easy |
| 529 | Minesweeper | 52.00% | Medium |
| 528 | Random Pick with Weight | 41.80% | Medium |
| 527 | Word Abbreviation $ | 33.90% | Hard |
| 526 | Beautiful Arrangement | 53.50% | Medium |
| 525 | Contiguous Array | 34.40% | Medium |
| 524 | Longest Word in Dictionary through Deleting | 40.20% | Medium |
| 523 | Continuous Subarray Sum | 21.30 | Medium |
| 522 | Longest Uncommon Subsequence II | 28.10% | Medium |
| 521 | Longest Uncommon Subsequence I | 50.70% | Easy |
| 520 | Detect Capital | 54.20% | Easy |
| 519 | Random Flip Matrix | 32.20% | Medium |
| 518 | Coin Change 2 | 33.20% | Medium |
| 517 | Super Washing Machines | 34.60% | Hard |
| 516 | Longest Palindromic Subsequence | 42.00% | Medium |
| 515 | Find Largest Value in Each Tree Row | 52.70% | Medium |
| 514 | Freedom Trail | 27.20% | Hard |
| 513 | Find Bottom Left Tree Value | 55.60% | Medium |
| 510 | Inorder Successor in BST II $ | 56.20% | Medium |
| 509 | Fibonacci Number | 66.40% | Easy |
| 508 | Most Frequent Subtree Sum | 52.00% | Medium |
| 507 | Perfect Number | 32.70% | Easy |
| 506 | Relative Ranks | 48.50% | Easy |
| 505 | The Maze II | 34.80% | Medium |
| 504 | Base 7 | 46.40% | Easy |
| 503 | Next Greater Element II | 46.20% | Medium |
| 502 | IPO | 32.40% | Hard |
| 501 | Find Mode in Binary Search Tree | 39.40% | Easy |
| 500 | Keyboard Row | 60.20% | Easy |
| 499 | The Maze III | 32.00% | Hard |
| 498 | Diagonal Traverse | 46.20% | Medium |
| 497 | Random Point in Non-overlapping Rectangles | 33.20% | Medium |
| 496 | Next Greater Element I | 58.80% | Easy |
| 495 | Teemo Attacking | 51.90% | Medium |
| 494 | Target Sum | 44.40% | Medium |
| 493 | Reverse Pairs | 17.10% | Hard |
| 492 | Construct the Rectangle | 49.70% | Easy |
| 491 | Increasing Subsequences | 39.30% | Medium |
| 490 | The Maze | 42.80% | Medium |
| 489 | Robot Room Cleaner | 57.10% | Hard |
| 488 | Zuma Game | 38.00% | Hard |
| 487 | Max Consecutive Ones II $ | 42.70% | Medium |
| 486 | Predict the Winner | 43.60% | Medium |
| 485 | Max Consecutive Ones | 55.30% | Easy |
| 484 | Find Permutation $ | 50.50% | Medium |
| 483 | Smallest Good Base | 30.60% | Hard |
| 482 | License Key Formatting | 41.20% | Medium |
| 481 | Magical String | 46.20% | Medium |
| 480 | Sliding Window Median | 31.00% | Hard |
| 479 | Largest Palindrome Product | 23.90% | Easy |
| 478 | Generate Random Point in a Circle | 33.80% | Medium |
| 477 | Total Hamming Distance | 44.10% | Medium |
| 476 | Number Complement | 61.20% | Easy |
| 475 | Heaters | 30.20% | Easy |
| 474 | Ones and Zeroes | 34.90% | Medium |
| 473 | Matchsticks to Square | 31.80% | Medium |
| 472 | Concatenated Words | 29.20% | Hard |
| 471 | Encode String with Shortest Length $ | 43.50% | Hard |
| 470 | Implement Rand10() Using Rand7() | 43.00% | Medium |
| 469 | Convex Polygon $ | 27.20% | Medium |
| 468 | Validate IP Address | 22.10% | Medium |
| 467 | Unique Substrings in Wraparound String | 29.90% | Medium |
| 466 | Count The Repetitions | 24.20% | Hard |
| 465 | Optimal Account Balancing $ | 29.20% | Hard |
| 464 | Can I Win | 22.20% | Medium |
| 463 | Island Perimeter | 56.70% | Easy |
| 462 | Minimum Moves to Equal Array Elements II | 50.90% | Medium |
| 461 | Hamming Distance | 73.20% | Easy |
| 460 | LFU Cache | 18.30% | Hard |
| 459 | Repeated Substring Pattern | 39.70% | Easy |
| 458 | Poor Pigs | 40.70% | Easy |
| 457 | Circular Array Loop | 20.60% | Medium |
| 456 | 132 Pattern | 28.00% | Medium |
| 455 | Assign Cookies | 48.10% | Easy |
| 454 | 4Sum II | 42.80% | Medium |
| 453 | Minimum Moves to Equal Array Elements | 46.30% | Easy |
| 452 | Minimum Number of Arrows to Burst Balloons | 42.10% | Medium |
| 451 | Sort Characters By Frequency | 50.90% | Medium |
| 450 | Delete Node in a BST | 34.50% | Medium |
| 449 | Serialize and Deserialize BST | 41.20% | Medium |
| 448 | Find All Numbers Disappeared in an Array | 58.30% | Easy |
| 447 | Number of Boomerangs | 42.20% | Easy |
| 446 | Arithmetic Slices II - Subsequence | 22.30% | Hard |
| 445 | Add Two Numbers II | 45.40% | Medium |
| 444 | Sequence Reconstruction $ | 20.50% | Medium |
| 443 | String Compression | 35.80% | Easy |
| 442 | Find All Duplicates in an Array | 46.40% | Medium |
| 441 | Arranging Coins | 36.20% | Easy |
| 440 | K-th Smallest in Lexicographical Order | 21.50% | Hard |
| 439 | Ternary Expression Parser $ | 49.40% | Medium |
| 438 | Find All Anagrams in a String | 33.50% | Easy |
| 437 | Path Sum III | 38.60% | Easy |
| 436 | Find Right Interval | 42.30% | Medium |
| 435 | Non-overlapping Intervals | 39.80% | Medium |
| 434 | Number of Segments in a String | 38.40% | Easy |
| 433 | Minimum Genetic Mutation | 33.50% | Medium |
| 432 | All O`one Data Structure | 28.30% | Hard |
| 431 | Encode N-ary Tree to Binary Tree $ | 53.70% | Hard |
| 430 | Flatten a Multilevel Doubly Linked List | 36.20% | Medium |
| 429 | N-ary Tree Level Order Traversal | 55.80% | Easy |
| 428 | Serialize and Deserialize N-ary Tree $ | 48.10% | Hard |
| 427 | Construct Quad Tree | 49.20% | Easy |
| 426 | Convert Binary Search Tree to Sorted Doubly Linked List | 43.30% | Medium |
| 425 | Word Squares $ | 40.10% | Hard |
| 424 | Longest Repeating Character Replacement | 38.10% | Medium |
| 423 | Reconstruct Original Digits from English | 40.80% | Medium |
| 422 | Valid Word Square $ | 36.40% | Easy |
| 421 | Maximum XOR of Two Numbers in an Array | 36.40% | Medium |
| 420 | Strong Password Checker | 22.10% | Hard |
| 419 | Battleships in a Board | 59.30% | Medium |
| 418 | Sentence Screen Fitting $ | 25.10% | Medium |
| 417 | Pacific Atlantic Water Flow | 31.10% | Medium |
| 416 | Partition Equal Subset Sum | 36.80% | Medium |
| 415 | Add Strings | 41.50% | Easy |
| 414 | Third Maximum Number | 26.50% | Easy |
| 413 | Arithmetic Slices | 53.50% | Medium |
| 412 | Fizz Buzz | 57.50% | Easy |
| 411 | Minimum Unique Word Abbreviation $ | 25.60% | Hard |
| 410 | Split Array Largest Sum | 25.00% | Hard |
| 409 | Longest Palindrome | 44.90% | Easy |
| 408 | Valid Word Abbreviation $ | 26.20% | Easy |
| 407 | Trapping Rain Water II | 33.10% | Hard |
| 406 | Queue Reconstruction by Height | 54.10% | Medium |
| 405 | Convert a Number to Hexadecimal | 41.80% | Easy |
| 404 | Sum of Left Leaves | 46.20% | Easy |
| 403 | Frog Jump | 31.70% | Hard |
| 402 | Remove K Digits | 25.90% | Medium |
| 401 | Binary Watch | 43.00% | Easy |
| 400 | Nth Digit | 30.70% | Easy |
| 399 | Evaluate Division | 34.60% | Medium |
| 398 | Random Pick Index | 30.40% | Medium |
| 397 | Integer Replacement | 25.90% | Easy |
| 396 | Rotate Function | 28.40% | Easy |
| 395 | Longest Substring with At Least K Repeating Characters | 32.50% | Medium |
| 394 | Decode String | 38.60% | Medium |
| 393 | UTF-8 Validation | 33.00% | Medium |
| 392 | Is Subsequence | 44.10% | Medium |
| 391 | Perfect Rectangle | 13.30% | Hard |
| 390 | Elimination Game | 12.50% | Medium |
| 389 | Find the Difference | 49.90% | Easy |
| 388 | Longest Absolute File Path | 28.30% | Medium |
| 387 | First Unique Character in a String | 43.10% | Easy |
| 386 | Lexicographical Numbers | 31.00% | Medium |
| 385 | Mini Parser | 26.90% | Medium |
| 384 | Shuffle an Array | 45.50% | Medium |
| 383 | Ransom Note | 44.60% | Easy |
| 382 | Linked List Random Node | 48.60% | Medium |
| 381 | Insert Delete GetRandom O(1) - Duplicates allowed | 30.90% | Hard |
| 380 | Insert Delete GetRandom O(1) | 33.80% | Medium |
| 379 | Design Phone Directory $ | 25.80% | Medium |
| 378 | Kth Smallest Element in a Sorted Matrix | 40.20% | Medium |
| 377 | Combination Sum IV | 37.50% | Medium |
| 376 | Wiggle Subsequence | 35.80% | Medium |
| 375 | Guess Number Higher or Lower II | 28.30% | Medium |
| 374 | Guess Number Higher or Lower | 31.70% | Easy |
| 373 | Find K Pairs with Smallest Sums | 25.50% | Medium |
| 372 | Super Pow | 30.10% | Medium |
| 371 | Sum of Two Integers | 54.00% | Easy |
| 370 | Range Addition $ | 49.90% | Medium |
| 369 | Plus One Linked List $ | 50.10% | Medium |
| 368 | Largest Divisible Subset | 32.00% | Medium |
| 367 | Valid Perfect Square | 36.60% | Medium |
| 366 | Find Leaves of Binary Tree $ | 53.60% | Medium |
| 365 | Water and Jug Problem | 20.10% | Medium |
| 364 | Nested List Weight Sum II $ | 47.20% | Medium |
| 363 | Max Sum of Rectangle No Larger Than K | 27.00% | Hard |
| 362 | Design Hit Counter $ | 48.30% | Medium |
| 361 | Bomb Enemy $ | 32.60% | Medium |
| 360 | Sort Transformed Array $ | 40.80% | Medium |
| 359 | Logger Rate Limiter $ | 56.00% | Easy |
| 358 | Rearrange String k Distance Apart $ | 26.90% | Hard |
| 357 | Count Numbers with Unique Digits | 42.50% | Medium |
| 356 | Line Reflection $ | 28.70% | Medium |
| 355 | Design Twitter | 22.20% | Medium |
| 354 | Russian Doll Envelopes | 27.10% | Hard |
| 353 | Design Snake Game $ | 19.80% | Medium |
| 352 | Data Stream as Disjoint Intervals | 34.40% | Hard |
| 351 | Android Unlock Patterns $ | 32.00% | Medium |
| 350 | Intersection of Two Arrays II | 41.50% | Easy |
| 349 | Intersection of Two Arrays | 47.80% | Easy |
| 348 | Design Tic-Tac-Toe $ | 45.60% | Medium |
| 347 | Top K Frequent Elements | 44.50% | Medium |
| 346 | Moving Average from Data Stream $ | 69.20% | Easy |
| 345 | Reverse Vowels of a String | 35.30% | Easy |
| 344 | Reverse String | 58.90% | Easy |
| 343 | Integer Break | 43.60% | Medium |
| 342 | Power of Four | 34.10% | Easy |
| 341 | Flatten Nested List Iterator $ | 18.70% | Medium |
| 340 | Longest Substring with At Most K Distinct Characters $ | 36.30% | Hard |
| 339 | Nested List Weight Sum $ | 54.60% | Easy |
| 338 | Counting Bits | 55.40% | Medium |
| 337 | House Robber III | 37.00% | Medium |
| 336 | Palindrome Pairs | 18.70% | Hard |
| 335 | Self Crossing | 18.00% | Medium |
| 334 | Increasing Triplet Subsequence | 33.20% | Medium |
| 333 | Largest BST Subtree $ | 26.50% | Medium |
| 332 | Reconstruct Itinerary | 23.40% | Medium |
| 331 | Verify Preorder Serialization of a Binary Tree | 31.50% | Medium |
| 330 | Patching Array | 28.80% | Medium |
| 329 | Longest Increasing Path in a Matrix | 29.50% | Medium |
| 328 | Odd Even Linked List | 37.80% | Easy |
| 327 | Count of Range Sum | 24.30% | Hard |
| 326 | Power of Three | 35.30% | Easy |
| 325 | Maximum Size Subarray Sum Equals k $ | 39.60% | Easy |
| 324 | Wiggle Sort II | 20.10% | Medium |
| 323 | Number of Connected Components in an Undirected Graph $ | 43.30% | Medium |
| 322 | Coin Change | 24.90% | Medium |
| 321 | Create Maximum Number | 19.10% | Hard |
| 320 | Generalized Abbreviation $ | 40.40% | Medium |
| 319 | Bulb Switcher | 39.20% | Medium |
| 318 | Maximum Product of Word Lengths | 38.70% | Medium |
| 317 | Shortest Distance from All Buildings $ | 29.10% | Hard |
| 316 | Remove Duplicate Letters | 23.00% | Medium |
| 315 | Count of Smaller Numbers After Self | 28.20% | Hard |
| 314 | Binary Tree Vertical Order Traversal $ | 30.10% | Medium |
| 313 | Super Ugly Number | 31.20% | Medium |
| 312 | Burst Balloons | 24.50% | Medium |
| 311 | Sparse Matrix Multiplication $ | 40.00% | Medium |
| 310 | Minimum Height Trees | 20.20% | Medium |
| 309 | Best Time to Buy and Sell Stock with Cooldown | 32.60% | Medium |
| 308 | Range Sum Query 2D - Mutable $ | 20.30% | Hard |
| 307 | Range Sum Query - Mutable | 14.50% | Medium |
| 306 | Additive Number | 23.30% | Medium |
| 305 | Number of Islands II $ | 26.70% | Hard |
| 304 | Range Sum Query 2D - Immutable | 21.50% | Medium |
| 303 | Range Sum Query - Immutable | 25.70% | Easy |
| 302 | Smallest Rectangle Enclosing Black Pixels $ | 36.70% | Hard |
| 301 | Remove Invalid Parentheses | 27.00% | Hard |
| 300 | Longest Increasing Subsequence | 31.50% | Medium |
| 299 | Bulls and Cows | 23.80% | Easy |
| 298 | Binary Tree Longest Consecutive Sequence $ | 32.20% | Medium |
| 297 | Serialize and Deserialize Binary Tree | 23.80% | Medium |
| 296 | Best Meeting Point $ | 41.40% | Hard |
| 295 | Find Median from Data Stream | 18.60% | Hard |
| 294 | Flip Game II $ | 38.10% | Medium |
| 293 | Flip Game $ | 47.60% | Easy |
| 292 | Nim Game | 49.50% | Easy |
| 291 | Word Pattern II $ | 31.50% | Hard |
| 290 | Word Pattern | 26.50% | Easy |
| 289 | Game of Life | 32.60% | Medium |
| 288 | Unique Word Abbreviation $ | 16.80% | Easy |
| 287 | Find the Duplicate Number | 32.80% | Hard |
| 286 | Walls and Gates $ | 29.90% | Medium |
| 285 | Inorder Successor in BST $ | 32.50% | Medium |
| 284 | Peeking Iterator | 31.00% | Medium |
| 283 | Move Zeroes | 41.40% | Easy |
| 282 | Expression Add Operators | 18.90% | Hard |
| 281 | Zigzag Iterator $ | 37.20% | Medium |
| 280 | Wiggle Sort $ | 43.30% | Medium |
| 279 | Perfect Squares | 28.80% | Medium |
| 278 | First Bad Version | 19.80% | Easy |
| 277 | Find the Celebrity $ | 31.70% | Medium |
| 276 | Paint Fence $ | 25.00% | Easy |
| 275 | H-Index II | 31.40% | Medium |
| 274 | H-Index | 25.30% | Medium |
| 273 | Integer to English Words | 15.50% | Medium |
| 272 | Closest Binary Search Tree Value II $ | 26.90% | Hard |
| 271 | Encode and Decode Strings $ | 25.40% | Medium |
| 270 | Closest Binary Search Tree Value $ | 29.40% | Easy |
| 269 | Alien Dictionary $ | 16.50% | Hard |
| 268 | Missing Number | 34.70% | Medium |
| 267 | Palindrome Permutation II $ | 22.50% | Medium |
| 266 | Palindrome Permutation $ | 45.80% | Easy |
| 265 | Paint House II $ | 30.00% | Hard |
| 264 | Ugly Number II | 21.60% | Medium |
| 263 | Ugly Number | 32.6% | Easy |
| 262 | Trips and Users * | 16.10% | Hard |
| 261 | Graph Valid Tree $ | 25.40% | Medium |
| 260 | Single Number III | 37.60% | Medium |
| 259 | 3Sum Smaller $ | 34.20% | Medium |
| 258 | Add Digits | 46.50% | Easy |
| 257 | Binary Tree Paths | 21.90% | Easy |
| 256 | Paint House $ | 38.40% | Medium |
| 255 | Verify Preorder Sequence in Binary Search Tree $ | 32.30% | Medium |
| 254 | Factor Combinations $ | 29.00% | Medium |
| 253 | Meeting Rooms II $ | 28.80% | Medium |
| 252 | Meeting Rooms $ | 35.40% | Easy |
| 251 | Flatten 2D Vector $ | 28.30% | Medium |
| 250 | Count Univalue Subtrees $ | 32.70% | Medium |
| 249 | Group Shifted Strings $ | 25.20% | Easy |
| 248 | Strobogrammatic Number III $ | 21.80% | Hard |
| 247 | Strobogrammatic Number II $ | 26.70% | Medium |
| 246 | Strobogrammatic Number $ | 31.60% | Easy |
| 245 | Shortest Word Distance III $ | 43.20% | Medium |
| 244 | Shortest Word Distance II $ | 33.70% | Medium |
| 243 | Shortest Word Distance $ | 41.80% | Easy |
| 242 | Valid Anagram | 39.30% | Easy |
| 241 | Different Ways to Add Parentheses | 27.10% | Medium |
| 240 | Search a 2D Matrix II | 31.40% | Medium |
| 239 | Sliding Window Maximum | 24.30% | Hard |
| 238 | Product of Array Except Self | 42.40% | Medium |
| 237 | Delete Node in a Linked List | 50.90% | Easy |
| 236 | Lowest Common Ancestor of a Binary Tree | 28.30% | Medium |
| 235 | Lowest Common Ancestor of a Binary Search Tree | 38.90% | Medium |
| 234 | Palindrome Linked List | 23.80% | Easy |
| 233 | Number of Digit One | 16.10% | Medium |
| 232 | Implement Queue using Stacks | 37.40% | Easy |
| 231 | Power of Two | 31.30% | Easy |
| 230 | Kth Smallest Element in a BST | 30.50% | Medium |
| 229 | Majority Element II | 30.50% | Medium |
| 228 | Summary Ranges | 21.10% | Easy |
| 227 | Basic Calculator II | 18.00% | Medium |
| 226 | Invert Binary Tree | 35.40% | Easy |
| 225 | Implement Stack using Queues | 29.60% | Medium |
| 224 | Basic Calculator | 15.80% | Medium |
| 223 | Rectangle Area | 25.60% | Easy |
| 222 | Count Complete Tree Nodes | 19.40% | Medium |
| 221 | Maximal Square | 20.30% | Medium |
| 220 | Contains Duplicate III | 15.30% | Medium |
| 219 | Contains Duplicate II | 25.60% | Easy |
| 218 | The Skyline Problem | 16.20% | Hard |
| 217 | Contains Duplicate | 35.90% | Easy |
| 216 | Combination Sum III | 27.70% | Medium |
| 215 | Kth Largest Element in an Array | 27.30% | Medium |
| 214 | Shortest Palindrome | 16.80% | Hard |
| 213 | House Robber II | 26.30% | Medium |
| 212 | Word Search II | 15.00% | Hard |
| 211 | Add and Search Word - Data structure design | 20.70% | Medium |
| 210 | Course Schedule II | 19.30% | Medium |
| 209 | Minimum Size Subarray Sum | 22.90% | Medium |
| 208 | Implement Trie (Prefix Tree) | 24.80% | Medium |
| 207 | Course Schedule | 21.70% | Medium |
| 206 | Reverse Linked List | 31.50% | Easy |
| 205 | Isomorphic Strings | 24.20% | Easy |
| 204 | Count Primes | 19.00% | Easy |
| 203 | Remove Linked List Elements | 25.80% | Easy |
| 202 | Happy Number | 31.40% | Easy |
| 201 | Bitwise AND of Numbers Range | 23.30% | Medium |
| 200 | Number of Islands | 21.90% | Medium |
| 199 | Binary Tree Right Side View | 27.10% | Medium |
| 198 | House Robber | 28.80% | Easy |
| 197 | Rising Temperature * | 25.90% | Easy |
| 196 | Delete Duplicate Emails * | 19.00% | Easy |
| 195 | Tenth Line # | 32.20% | Easy |
| 194 | Transpose File # | 21.40% | Medium |
| 193 | Valid Phone Numbers # | 24.40% | Easy |
| 192 | Word Frequency # | 26.10% | Medium |
| 191 | Number of 1 Bits | 37.30% | Easy |
| 190 | Reverse Bits | 28.40% | Easy |
| 189 | Rotate Array | 17.80% | Easy |
| 188 | Best Time to Buy and Sell Stock IV | 17.30% | Hard |
| 187 | Repeated DNA Sequences | 19.50% | Medium |
| 186 | Reverse Words in a String II $ | 31.10% | Medium |
| 185 | Department Top Three Salaries * | 15.20% | Hard |
| 184 | Department Highest Salary * | 19.00% | Medium |
| 183 | Customers Who Never Order * | 33.70% | Easy |
| 182 | Duplicate Emails * | 38.10% | Easy |
| 181 | Employees Earning More Than Their Managers * | 41.00% | Easy |
| 180 | Consecutive Numbers * | 26.60% | Medium |
| 179 | Largest Number | 15.70% | Medium |
| 178 | Rank Scores * | 24.60% | Medium |
| 177 | Nth Highest Salary * | 16.30% | Medium |
| 176 | Second Highest Salary * | 25.00% | Easy |
| 175 | Combine Two Tables * | 34.40% | Easy |
| 174 | Dungeon Game | 17.70% | Hard |
| 173 | Binary Search Tree Iterator | 29.30% | Medium |
| 172 | Factorial Trailing Zeroes | 28.40% | Easy |
| 171 | Excel Sheet Column Number | 36.50% | Easy |
| 170 | Two Sum III - Data structure design $ | 24.70% | Easy |
| 169 | Majority Element | 35.00% | Easy |
| 168 | Excel Sheet Column Title | 18.10% | Easy |
| 167 | Two Sum II - Input array is sorted $ | 43.30% | Medium |
| 166 | Fraction to Recurring Decimal | 12.70% | Medium |
| 165 | Compare Version Numbers | 15.20% | Easy |
| 164 | Maximum Gap | 24.40% | Hard |
| 163 | Missing Ranges $ | 24.10% | Medium |
| 162 | Find Peak Element | 31.50% | Medium |
| 161 | One Edit Distance $ | 24.00% | Medium |
| 160 | Intersection of Two Linked Lists | 28.70% | Easy |
| 159 | Longest Substring with At Most Two Distinct Characters $ | 30.20% | Hard |
| 158 | Read N Characters Given Read4 II - Call multiple times $ | 22.30% | Hard |
| 157 | Read N Characters Given Read4 $ | 29.80% | Easy |
| 156 | Binary Tree Upside Down $ | 34.30% | Medium |
| 155 | Min Stack | 18.50% | Easy |
| 154 | Find Minimum in Rotated Sorted Array II | 31.90% | Hard |
| 153 | Find Minimum in Rotated Sorted Array | 33.30% | Medium |
| 152 | Maximum Product Subarray | 19.40% | Medium |
| 151 | Reverse Words in a String | 15.10% | Medium |
| 150 | Evaluate Reverse Polish Notation | 21.10% | Medium |
| 149 | Max Points on a Line | 12.60% | Hard |
| 148 | Sort List | 22.00% | Medium |
| 147 | Insertion Sort List | 26.40% | Medium |
| 146 | LRU Cache | 15.00% | Hard |
| 145 | Binary Tree Postorder Traversal | 32.40% | Hard |
| 144 | Binary Tree Preorder Traversal | 36.30% | Medium |
| 143 | Reorder List | 21.00% | Medium |
| 142 | Linked List Cycle II | 31.40% | Medium |
| 141 | Linked List Cycle | 36.30% | Medium |
| 140 | Word Break II | 17.70% | Hard |
| 139 | Word Break | 23.00% | Medium |
| 138 | Copy List with Random Pointer | 25.10% | Hard |
| 137 | Single Number II | 35.00% | Medium |
| 136 | Single Number | 45.10% | Medium |
| 135 | Candy | 20.50% | Hard |
| 134 | Gas Station | 25.70% | Medium |
| 133 | Clone Graph | 24.00% | Medium |
| 132 | Palindrome Partitioning II | 19.70% | Hard |
| 131 | Palindrome Partitioning | 26.70% | Medium |
| 130 | Surrounded Regions | 14.60% | Medium |
| 129 | Sum Root to Leaf Numbers | 30.30% | Medium |
| 128 | Longest Consecutive Sequence | 29.40% | Hard |
| 127 | Word Ladder | 19.30% | Medium |
| 126 | Word Ladder II | 12.90% | Hard |
| 125 | Valid Palindrome | 22.00% | Easy |
| 124 | Binary Tree Maximum Path Sum | 21.50% | Hard |
| 123 | Best Time to Buy and Sell Stock III | 23.90% | Hard |
| 122 | Best Time to Buy and Sell Stock II | 38.30% | Medium |
| 121 | Best Time to Buy and Sell Stock | 32.60% | Medium |
| 120 | Triangle | 27.40% | Medium |
| 119 | Pascal's Triangle II | 29.40% | Easy |
| 118 | Pascal's Triangle | 30.10% | Easy |
| 117 | Populating Next Right Pointers in Each Node II | 32.00% | Hard |
| 116 | Populating Next Right Pointers in Each Node | 36.20% | Medium |
| 115 | Distinct Subsequences | 26.30% | Hard |
| 114 | Flatten Binary Tree to Linked List | 28.80% | Medium |
| 113 | Path Sum II | 26.60% | Medium |
| 112 | Path Sum | 29.80% | Easy |
| 111 | Minimum Depth of Binary Tree | 29.10% | Easy |
| 110 | Balanced Binary Tree | 32.00% | Easy |
| 109 | Convert Sorted List to Binary Search Tree | 27.90% | Medium |
| 108 | Convert Sorted Array to Binary Search Tree | 34.00% | Medium |
| 107 | Binary Tree Level Order Traversal II | 31.10% | Easy |
| 106 | Construct Binary Tree from Inorder and Postorder Traversal | 26.80% | Medium |
| 105 | Construct Binary Tree from Preorder and Inorder Traversal | 26.40% | Medium |
| 104 | Maximum Depth of Binary Tree | 45.10% | Easy |
| 103 | Binary Tree Zigzag Level Order Traversal | 26.40% | Medium |
| 102 | Binary Tree Level Order Traversal | 29.30% | Easy |
| 101 | Symmetric Tree | 31.60% | Easy |
| 100 | Same Tree | 41.80% | Easy |
| 99 | Recover Binary Search Tree | 24.30% | Hard |
| 98 | Validate Binary Search Tree | 20.60% | Medium |
| 97 | Interleaving String | 20.80% | Hard |
| 96 | Unique Binary Search Trees | 36.00% | Medium |
| 95 | Unique Binary Search Trees II | 28.00% | Medium |
| 94 | Binary Tree Inorder Traversal | 36.20% | Medium |
| 93 | Restore IP Addresses | 21.00% | Medium |
| 92 | Reverse Linked List II | 26.10% | Medium |
| 91 | Decode Ways | 16.40% | Medium |
| 90 | Subsets II | 27.70% | Medium |
| 89 | Gray Code | 32.80% | Medium |
| 88 | Merge Sorted Array | 29.70% | Easy |
| 87 | Scramble String | 24.20% | Hard |
| 86 | Partition List | 27.50% | Medium |
| 85 | Maximal Rectangle | 22.00% | Hard |
| 84 | Largest Rectangle in Histogram | 22.60% | Hard |
| 83 | Remove Duplicates from Sorted List | 34.50% | Easy |
| 82 | Remove Duplicates from Sorted List II | 25.00% | Medium |
| 81 | Search in Rotated Sorted Array II | 31.40% | Medium |
| 80 | Remove Duplicates from Sorted Array II | 30.50% | Medium |
| 79 | Word Search | 20.30% | Medium |
| 78 | Subsets | 28.20% | Medium |
| 77 | Combinations | 30.90% | Medium |
| 76 | Minimum Window Substring | 18.90% | Hard |
| 75 | Sort Colors | 32.60% | Medium |
| 74 | Search a 2D Matrix | 31.60% | Medium |
| 73 | Set Matrix Zeroes | 31.40% | Medium |
| 72 | Edit Distance | 26.20% | Hard |
| 71 | Simplify Path | 20.00% | Medium |
| 70 | Climbing Stairs | 34.40% | Easy |
| 69 | Sqrt(x) | 23.10% | Medium |
| 68 | Text Justification | 14.60% | Hard |
| 67 | Add Binary | 24.70% | Easy |
| 66 | Plus One | 30.40% | Easy |
| 65 | Valid Number | 11.40% | Hard |
| 64 | Minimum Path Sum | 32.20% | Medium |
| 63 | Unique Paths II | 28.00% | Medium |
| 62 | Unique Paths | 32.80% | Medium |
| 61 | Rotate List | 21.70% | Medium |
| 60 | Permutation Sequence | 22.80% | Medium |
| 59 | Spiral Matrix II | 31.80% | Medium |
| 58 | Length of Last Word | 28.00% | Easy |
| 57 | Insert Interval | 21.40% | Hard |
| 56 | Merge Intervals | 22.40% | Hard |
| 55 | Jump Game | 27.00% | Medium |
| 54 | Spiral Matrix | 20.80% | Medium |
| 53 | Maximum Subarray | 34.50% | Medium |
| 52 | N-Queens II | 35.80% | Hard |
| 51 | N-Queens | 26.50% | Hard |
| 50 | Pow(x, n) | 26.70% | Medium |
| 49 | Anagrams | 24.30% | Medium |
| 48 | Rotate Image | 31.90% | Medium |
| 47 | Permutations II | 25.80% | Hard |
| 46 | Permutations | 31.90% | Medium |
| 45 | Jump Game II | 24.20% | Hard |
| 44 | Wildcard Matching | 15.00% | Hard |
| 43 | Multiply Strings | 21.00% | Medium |
| 42 | Trapping Rain Water | 30.00% | Hard |
| 41 | First Missing Positive | 22.90% | Hard |
| 40 | Combination Sum II | 25.20% | Medium |
| 39 | Combination Sum | 27.90% | Medium |
| 38 | Count and Say | 25.20% | Easy |
| 37 | Sudoku Solver | 21.80% | Hard |
| 36 | Valid Sudoku | 27.20% | Easy |
| 35 | Search Insert Position | 35.40% | Medium |
| 34 | Search for a Range | 27.50% | Medium |
| 33 | Search in Rotated Sorted Array | 28.80% | Hard |
| 32 | Longest Valid Parentheses | 20.90% | Hard |
| 31 | Next Permutation | 25.00% | Medium |
| 30 | Substring with Concatenation of All Words | 19.40% | Hard |
| 29 | Divide Two Integers | 15.00% | Medium |
| 28 | Implement strStr() | 22.20% | Easy |
| 27 | Remove Element | 32.10% | Easy |
| 26 | Remove Duplicates from Sorted Array | 31.30% | Easy |
| 25 | Reverse Nodes in k-Group | 25.50% | Hard |
| 24 | Swap Nodes in Pairs | 32.50% | Medium |
| 23 | Merge k Sorted Lists | 21.10% | Hard |
| 22 | Generate Parentheses | 32.60% | Medium |
| 21 | Merge Two Sorted Lists | 32.70% | Easy |
| 20 | Valid Parentheses | 26.50% | Easy |
| 19 | Remove Nth Node From End of List | 27.10% | Easy |
| 18 | 4Sum | 21.70% | Medium |
| 17 | Letter Combinations of a Phone Number | 25.80% | Medium |
| 16 | 3Sum Closest | 26.90% | Medium |
| 15 | 3Sum | 16.90% | Medium |
| 14 | Longest Common Prefix | 25.50% | Easy |
| 13 | Roman to Integer | 34.00% | Easy |
| 12 | Integer to Roman | 33.80% | Medium |
| 11 | Container With Most Water | 32.00% | Medium |
| 10 | Regular Expression Matching | 20.70% | Hard |
| 9 | Palindrome Number | 28.30% | Easy |
| 8 | String to Integer (atoi) | 13.00% | Easy |
| 7 | Reverse Integer | 25.10% | Easy |
| 6 | ZigZag Conversion | 21.80% | Easy |
| 5 | Longest Palindromic Substring | 20.70% | Medium |
| 4 | Median of Two Sorted Arrays | 17.40% | Hard |
| 3 | Longest Substring Without Repeating Characters | 20.60% | Medium |
| 2 | Add Two Numbers | 21.10% | Medium |
| 1 | Two Sum | 17.70% | Medium |
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