919 Complete Binary Tree Inserter 55.70% Medium 918 Maximum Sum Circular Subarray 33.20% Medium 917 Reverse Only Letters 56.30% Easy 916 Word Subsets 45.90% Medium 915 Partition Array into Disjoint Intervals 43.90% Medium 914 X of a Kind in a Deck of Cards 34.00% Easy 913 Cat and Mouse 29.90% Hard 912 Sort an Array 62.90% Medium 911 Online Election 48.30% Medium 910 Smallest Range II 24.90% Medium 909 Snakes and Ladders 36.10% Easy 908 Smallest Range I 65.00% Easy 907 Sum of Subarray Minimums 29.40% Medium 906 Super Palindromes 30.80% Hard 905 Sort Array By Parity 72.60% Easy 904 Fruit Into Baskets 41.70% Medium 903 Valid Permutations for DI Sequence 45.10% Hard 902 Numbers At Most N Given Digit Set 28.80% Hard 901 Online Stock Span 49.90% Medium 900 RLE Iterator 50.50% Medium 899 Orderly Queue 47.70% Hard 898 Bitwise ORs of Subarrays 34.70% Medium 897 Increasing Order Search Tree 65.20% Easy 896 Monotonic Array 55.40% Easy 895 Maximum Frequency Stack 56.70% Hard 894 All Possible Full Binary Trees 71.30% Medium 893 Groups of Special-Equivalent Strings 63.00% Easy 892 Surface Area of 3D Shapes 56.10% Easy 891 Sum of Subsequence Widths 29.20% Hard 890 Find and Replace Pattern 71.30% Medium 889 Construct Binary Tree from Preorder and Postorder Traversal 60.70% Medium 888 Fair Candy Swap 56.90% Easy 887 Super Egg Drop 24.90% Hard 886 Possible Bipartition 40.90% Medium 885 Spiral Matrix III 64.80% Medium 884 Uncommon Words from Two Sentences 60.90% Easy 883 Projection Area of 3D Shapes 65.90% Easy 882 Reachable Nodes In Subdivided Graph 38.20% Hard 881 Boats to Save People 44.10% Medium 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 21.3 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 32.60% 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% 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