| 601 |
Human Traffic of Stadium |
MySQL |
Hard |
| 602 |
Friend Requests II: Who Has the Most Friends 🔒 |
MySQL |
Medium |
| 603 |
Consecutive Available Seats 🔒 |
MySQL |
Easy |
| 604 |
Design Compressed String Iterator 🔒 |
Go |
Easy |
| 605 |
Can Place Flowers |
Go |
Easy |
| 606 |
Construct String from Binary Tree |
Go |
Easy |
| 607 |
Sales Person 🔒 |
MySQL |
Easy |
| 608 |
Tree Node 🔒 |
MySQL |
Medium |
| 609 |
Find Duplicate File in System |
Go |
Medium |
| 610 |
Triangle Judgement 🔒 |
MySQL |
Easy |
| 611 |
Valid Triangle Number |
Go |
Medium |
| 612 |
Shortest Distance in a Plane 🔒 |
MySQL |
Medium |
| 613 |
Shortest Distance in a Line 🔒 |
MySQL |
Easy |
| 614 |
Second Degree Follower 🔒 |
MySQL |
Medium |
| 615 |
Average Salary: Departments VS Company 🔒 |
MySQL |
Hard |
| 616 |
Add Bold Tag in String 🔒 |
Go |
Medium |
| 617 |
Merge Two Binary Trees |
Go |
Easy |
| 618 |
Students Report By Geography 🔒 |
MySQL |
Hard |
| 619 |
Biggest Single Number 🔒 |
MySQL |
Easy |
| 620 |
Not Boring Movies |
MySQL |
Easy |
| 621 |
Task Scheduler |
Go |
Medium |
| 622 |
Design Circular Queue |
Go |
Medium |
| 623 |
Add One Row to Tree |
Go |
Medium |
| 624 |
Maximum Distance in Arrays 🔒 |
Go |
Medium |
| 625 |
Minimum Factorization 🔒 |
Go |
Medium |
| 626 |
Exchange Seats |
MySQL |
Medium |
| 627 |
Swap Salary |
MySQL |
Easy |
| 628 |
Maximum Product of Three Numbers |
Go |
Easy |
| 629 |
K Inverse Pairs Array |
Go |
Hard |
| 630 |
Course Schedule III |
Go |
Hard |
| 631 |
Design Excel Sum Formula 🔒 |
Go |
Hard |
| 632 |
Smallest Range Covering Elements from K Lists |
Go |
Hard |
| 633 |
Sum of Square Numbers |
Go |
Medium |
| 634 |
Find the Derangement of An Array 🔒 |
Go |
Medium |
| 635 |
Design Log Storage System 🔒 |
Go |
Medium |
| 636 |
Exclusive Time of Functions |
Go |
Medium |
| 637 |
Average of Levels in Binary Tree |
Go |
Easy |
| 638 |
Shopping Offers |
Go |
Medium |
| 639 |
Decode Ways II |
Go |
Hard |
| 640 |
Solve the Equation |
Go |
Medium |
| 641 |
Design Circular Deque |
Go |
Medium |
| 642 |
Design Search Autocomplete System 🔒 |
Go |
Hard |
| 643 |
Maximum Average Subarray I |
Go |
Easy |
| 644 |
Maximum Average Subarray II 🔒 |
Go |
Hard |
| 645 |
Set Mismatch |
Go |
Easy |
| 646 |
Maximum Length of Pair Chain |
Go |
Medium |
| 647 |
Palindromic Substrings |
Go |
Medium |
| 648 |
Replace Words |
Go |
Medium |
| 649 |
Dota2 Senate |
Go |
Medium |
| 650 |
2 Keys Keyboard |
Go |
Medium |
| 651 |
4 Keys Keyboard 🔒 |
Go |
Medium |
| 652 |
Find Duplicate Subtrees |
Go |
Medium |
| 653 |
Two Sum IV - Input is a BST |
Go |
Easy |
| 654 |
Maximum Binary Tree |
Go |
Medium |
| 655 |
Print Binary Tree |
Go |
Medium |
| 656 |
Coin Path 🔒 |
Go |
Hard |
| 657 |
Robot Return to Origin |
Go |
Easy |
| 658 |
Find K Closest Elements |
Go |
Medium |
| 659 |
Split Array into Consecutive Subsequences |
Go |
Medium |
| 660 |
Remove 9 🔒 |
Go |
Hard |
| 661 |
Image Smoother |
Go |
Easy |
| 662 |
Maximum Width of Binary Tree |
Go |
Medium |
| 663 |
Equal Tree Partition 🔒 |
Go |
Medium |
| 664 |
Strange Printer |
Go |
Hard |
| 665 |
Non-decreasing Array |
Go |
Medium |
| 666 |
Path Sum IV 🔒 |
Go |
Medium |
| 667 |
Beautiful Arrangement II |
Go |
Medium |
| 668 |
Kth Smallest Number in Multiplication Table |
Go |
Hard |
| 669 |
Trim a Binary Search Tree |
Go |
Medium |
| 670 |
Maximum Swap |
Go |
Medium |
| 671 |
Second Minimum Node In a Binary Tree |
Go |
Easy |
| 672 |
Bulb Switcher II |
Go |
Medium |
| 673 |
Number of Longest Increasing Subsequence |
Go |
Medium |
| 674 |
Longest Continuous Increasing Subsequence |
Go |
Easy |
| 675 |
Cut Off Trees for Golf Event |
Go |
Hard |
| 676 |
Implement Magic Dictionary |
Go |
Medium |
| 677 |
Map Sum Pairs |
Go |
Medium |
| 678 |
Valid Parenthesis String |
Go |
Medium |
| 679 |
24 Game |
Go |
Hard |
| 680 |
Valid Palindrome II |
Go |
Easy |
| 681 |
Next Closest Time 🔒 |
Go |
Medium |
| 682 |
Baseball Game |
Go |
Easy |
| 683 |
K Empty Slots 🔒 |
Go |
Hard |
| 684 |
Redundant Connection |
Go |
Medium |
| 685 |
Redundant Connection II |
Go |
Hard |
| 686 |
Repeated String Match |
Go |
Medium |
| 687 |
Longest Univalue Path |
Go |
Medium |
| 688 |
Knight Probability in Chessboard |
Go |
Medium |
| 689 |
Maximum Sum of 3 Non-Overlapping Subarrays |
Go |
Hard |
| 690 |
Employee Importance |
Go |
Medium |
| 691 |
Stickers to Spell Word |
Go |
Hard |
| 692 |
Top K Frequent Words |
Go |
Medium |
| 693 |
Binary Number with Alternating Bits |
Go |
Easy |
| 694 |
Number of Distinct Islands 🔒 |
Go |
Medium |
| 695 |
Max Area of Island |
Go |
Medium |
| 696 |
Count Binary Substrings |
Go |
Easy |
| 697 |
Degree of an Array |
Go |
Easy |
| 698 |
Partition to K Equal Sum Subsets |
Go |
Medium |
| 699 |
Falling Squares |
Go |
Hard |
| 700 |
Search in a Binary Search Tree |
Go |
Easy |
| 701 |
Insert into a Binary Search Tree |
Go |
Medium |
| 702 |
Search in a Sorted Array of Unknown Size 🔒 |
Go |
Medium |
| 703 |
Kth Largest Element in a Stream |
Go |
Easy |
| 704 |
Binary Search |
Go |
Easy |
| 705 |
Design HashSet |
Go |
Easy |
| 706 |
Design HashMap |
Go |
Easy |
| 707 |
Design Linked List |
Go |
Medium |
| 708 |
Insert into a Sorted Circular Linked List 🔒 |
Go |
Medium |
| 709 |
To Lower Case |
Go |
Easy |
| 710 |
Random Pick with Blacklist |
Go |
Hard |
| 711 |
Number of Distinct Islands II 🔒 |
Go |
Hard |
| 712 |
Minimum ASCII Delete Sum for Two Strings |
Go |
Medium |
| 713 |
Subarray Product Less Than K |
Go |
Medium |
| 714 |
Best Time to Buy and Sell Stock with Transaction Fee |
Go |
Medium |
| 715 |
Range Module |
Go |
Hard |
| 716 |
Max Stack 🔒 |
Go |
Easy |
| 717 |
1-bit and 2-bit Characters |
Go |
Easy |
| 718 |
Maximum Length of Repeated Subarray |
Go |
Medium |
| 719 |
Find K-th Smallest Pair Distance |
Go |
Hard |
| 720 |
Longest Word in Dictionary |
Go |
Medium |
| 721 |
Accounts Merge |
Go |
Medium |
| 722 |
Remove Comments |
Go |
Medium |
| 723 |
Candy Crush 🔒 |
Go |
Medium |
| 724 |
Find Pivot Index |
Go |
Easy |
| 725 |
Split Linked List in Parts |
Go |
Medium |
| 726 |
Number of Atoms |
Go |
Hard |
| 727 |
Minimum Window Subsequence 🔒 |
Go |
Hard |
| 728 |
Self Dividing Numbers |
Go |
Easy |
| 729 |
My Calendar I |
Go |
Medium |
| 730 |
Count Different Palindromic Subsequences |
Go |
Hard |
| 731 |
My Calendar II |
Go |
Medium |
| 732 |
My Calendar III |
Go |
Hard |
| 733 |
Flood Fill |
Go |
Easy |
| 734 |
Sentence Similarity 🔒 |
Go |
Easy |
| 735 |
Asteroid Collision |
Go |
Medium |
| 736 |
Parse Lisp Expression |
Go |
Hard |
| 737 |
Sentence Similarity II 🔒 |
Go |
Medium |
| 738 |
Monotone Increasing Digits |
Go |
Medium |
| 739 |
Daily Temperatures |
Go |
Medium |
| 740 |
Delete and Earn |
Go |
Medium |
| 741 |
Cherry Pickup |
Go |
Hard |
| 742 |
Closest Leaf in a Binary Tree 🔒 |
Go |
Medium |
| 743 |
Network Delay Time |
Go |
Medium |
| 744 |
Find Smallest Letter Greater Than Target |
Go |
Easy |
| 745 |
Prefix and Suffix Search |
Go |
Hard |
| 746 |
Min Cost Climbing Stairs |
Go |
Easy |
| 747 |
Largest Number At Least Twice of Others |
Go |
Easy |
| 748 |
Shortest Completing Word |
Go |
Easy |
| 749 |
Contain Virus |
Go |
Hard |
| 750 |
Number Of Corner Rectangles 🔒 |
Go |
Medium |
| 751 |
IP to CIDR 🔒 |
Go |
Medium |
| 752 |
Open the Lock |
Go |
Medium |
| 753 |
Cracking the Safe |
Go |
Hard |
| 754 |
Reach a Number |
Go |
Medium |
| 755 |
Pour Water 🔒 |
Go |
Medium |
| 756 |
Pyramid Transition Matrix |
Go |
Medium |
| 757 |
Set Intersection Size At Least Two |
Go |
Hard |
| 758 |
Bold Words in String 🔒 |
Go |
Medium |
| 759 |
Employee Free Time 🔒 |
Go |
Hard |
| 760 |
Find Anagram Mappings 🔒 |
Go |
Easy |
| 761 |
Special Binary String |
Go |
Hard |
| 762 |
Prime Number of Set Bits in Binary Representation |
Go |
Easy |
| 763 |
Partition Labels |
Go |
Medium |
| 764 |
Largest Plus Sign |
Go |
Medium |
| 765 |
Couples Holding Hands |
Go |
Hard |
| 766 |
Toeplitz Matrix |
Go |
Easy |
| 767 |
Reorganize String |
Go |
Medium |
| 768 |
Max Chunks To Make Sorted II |
Go |
Hard |
| 769 |
Max Chunks To Make Sorted |
Go |
Medium |
| 770 |
Basic Calculator IV |
Go |
Hard |
| 771 |
Jewels and Stones |
Go |
Easy |
| 772 |
Basic Calculator III 🔒 |
Go |
Hard |
| 773 |
Sliding Puzzle |
Go |
Hard |
| 774 |
Minimize Max Distance to Gas Station 🔒 |
Go |
Hard |
| 775 |
Global and Local Inversions |
Go |
Medium |
| 776 |
Split BST 🔒 |
Go |
Medium |
| 777 |
Swap Adjacent in LR String |
Go |
Medium |
| 778 |
Swim in Rising Water |
Go |
Hard |
| 779 |
K-th Symbol in Grammar |
Go |
Medium |
| 780 |
Reaching Points |
Go |
Hard |
| 781 |
Rabbits in Forest |
Go |
Medium |
| 782 |
Transform to Chessboard |
Go |
Hard |
| 783 |
Minimum Distance Between BST Nodes |
Go |
Easy |
| 784 |
Letter Case Permutation |
Go |
Medium |
| 785 |
Is Graph Bipartite? |
Go |
Medium |
| 786 |
K-th Smallest Prime Fraction |
Go |
Hard |
| 787 |
Cheapest Flights Within K Stops |
Go |
Medium |
| 788 |
Rotated Digits |
Go |
Medium |
| 789 |
Escape The Ghosts |
Go |
Medium |
| 790 |
Domino and Tromino Tiling |
Go |
Medium |
| 791 |
Custom Sort String |
Go |
Medium |
| 792 |
Number of Matching Subsequences |
Go |
Medium |
| 793 |
Preimage Size of Factorial Zeroes Function |
Go |
Hard |
| 794 |
Valid Tic-Tac-Toe State |
Go |
Medium |
| 795 |
Number of Subarrays with Bounded Maximum |
Go |
Medium |
| 796 |
Rotate String |
Go |
Easy |
| 797 |
All Paths From Source to Target |
Go |
Medium |
| 798 |
Smallest Rotation with Highest Score |
Go |
Hard |
| 799 |
Champagne Tower |
Go |
Medium |
| 800 |
Similar RGB Color 🔒 |
Go |
Easy |
| 801 |
Minimum Swaps To Make Sequences Increasing |
Go |
Hard |
| 802 |
Find Eventual Safe States |
Go |
Medium |
| 803 |
Bricks Falling When Hit |
Go |
Hard |
| 804 |
Unique Morse Code Words |
Go |
Easy |
| 805 |
Split Array With Same Average |
Go |
Hard |
| 806 |
Number of Lines To Write String |
Go |
Easy |
| 807 |
Max Increase to Keep City Skyline |
Go |
Medium |
| 808 |
Soup Servings |
Go |
Medium |
| 809 |
Expressive Words |
Go |
Medium |
| 810 |
Chalkboard XOR Game |
Go |
Hard |
| 811 |
Subdomain Visit Count |
Go |
Medium |
| 812 |
Largest Triangle Area |
Go |
Easy |
| 813 |
Largest Sum of Averages |
Go |
Medium |
| 814 |
Binary Tree Pruning |
Go |
Medium |
| 815 |
Bus Routes |
Go |
Hard |
| 816 |
Ambiguous Coordinates |
Go |
Medium |
| 817 |
Linked List Components |
Go |
Medium |
| 818 |
Race Car |
Go |
Hard |
| 819 |
Most Common Word |
Go |
Easy |
| 820 |
Short Encoding of Words |
Go |
Medium |
| 821 |
Shortest Distance to a Character |
Go |
Easy |
| 822 |
Card Flipping Game |
Go |
Medium |
| 823 |
Binary Trees With Factors |
Go |
Medium |
| 824 |
Goat Latin |
Go |
Easy |
| 825 |
Friends Of Appropriate Ages |
Go |
Medium |
| 826 |
Most Profit Assigning Work |
Go |
Medium |
| 827 |
Making A Large Island |
Go |
Hard |
| 828 |
Count Unique Characters of All Substrings of a Given String |
Go |
Hard |
| 829 |
Consecutive Numbers Sum |
Go |
Hard |
| 830 |
Positions of Large Groups |
Go |
Easy |
| 831 |
Masking Personal Information |
Go |
Medium |
| 832 |
Flipping an Image |
Go |
Easy |
| 833 |
Find And Replace in String |
Go |
Medium |
| 834 |
Sum of Distances in Tree |
Go |
Hard |
| 835 |
Image Overlap |
Go |
Medium |
| 836 |
Rectangle Overlap |
Go |
Easy |
| 837 |
New 21 Game |
Go |
Medium |
| 838 |
Push Dominoes |
Go |
Medium |
| 839 |
Similar String Groups |
Go |
Hard |
| 840 |
Magic Squares In Grid |
Go |
Medium |
| 841 |
Keys and Rooms |
Go |
Medium |
| 842 |
Split Array into Fibonacci Sequence |
Go |
Medium |
| 843 |
Guess the Word |
Go |
Hard |
| 844 |
Backspace String Compare |
Go |
Easy |
| 845 |
Longest Mountain in Array |
Go |
Medium |
| 846 |
Hand of Straights |
Go |
Medium |
| 847 |
Shortest Path Visiting All Nodes |
Go |
Hard |
| 848 |
Shifting Letters |
Go |
Medium |
| 849 |
Maximize Distance to Closest Person |
Go |
Medium |
| 850 |
Rectangle Area II |
Go |
Hard |
| 851 |
Loud and Rich |
Go |
Medium |
| 852 |
Peak Index in a Mountain Array |
Go |
Easy |
| 853 |
Car Fleet |
Go |
Medium |
| 854 |
K-Similar Strings |
Go |
Hard |
| 855 |
Exam Room |
Go |
Medium |
| 856 |
Score of Parentheses |
Go |
Medium |
| 857 |
Minimum Cost to Hire K Workers |
Go |
Hard |
| 858 |
Mirror Reflection |
Go |
Medium |
| 859 |
Buddy Strings |
Go |
Easy |
| 860 |
Lemonade Change |
Go |
Easy |
| 861 |
Score After Flipping Matrix |
Go |
Medium |
| 862 |
Shortest Subarray with Sum at Least K |
Go |
Hard |
| 863 |
All Nodes Distance K in Binary Tree |
Go |
Medium |
| 864 |
Shortest Path to Get All Keys |
Go |
Hard |
| 865 |
Smallest Subtree with all the Deepest Nodes |
Go |
Medium |
| 866 |
Prime Palindrome |
Go |
Medium |
| 867 |
Transpose Matrix |
Go |
Easy |
| 868 |
Binary Gap |
Go |
Easy |
| 869 |
Reordered Power of 2 |
Go |
Medium |
| 870 |
Advantage Shuffle |
Go |
Medium |
| 871 |
Minimum Number of Refueling Stops |
Go |
Hard |
| 872 |
Leaf-Similar Trees |
Go |
Easy |
| 873 |
Length of Longest Fibonacci Subsequence |
Go |
Medium |
| 874 |
Walking Robot Simulation |
Go |
Medium |
| 875 |
Koko Eating Bananas |
Go |
Medium |
| 876 |
Middle of the Linked List |
Go |
Easy |
| 877 |
Stone Game |
Go |
Medium |
| 878 |
Nth Magical Number |
Go |
Hard |
| 879 |
Profitable Schemes |
Go |
Hard |
| 880 |
Decoded String at Index |
Go |
Medium |
| 881 |
Boats to Save People |
Go |
Medium |
| 882 |
Reachable Nodes In Subdivided Graph |
Go |
Hard |
| 883 |
Projection Area of 3D Shapes |
Go |
Easy |
| 884 |
Uncommon Words from Two Sentences |
Go |
Easy |
| 885 |
Spiral Matrix III |
Go |
Medium |
| 886 |
Possible Bipartition |
Go |
Medium |
| 887 |
Super Egg Drop |
Go |
Hard |
| 888 |
Fair Candy Swap |
Go |
Easy |
| 889 |
Construct Binary Tree from Preorder and Postorder Traversal |
Go |
Medium |
| 890 |
Find and Replace Pattern |
Go |
Medium |
| 891 |
Sum of Subsequence Widths |
Go |
Hard |
| 892 |
Surface Area of 3D Shapes |
Go |
Easy |
| 893 |
Groups of Special-Equivalent Strings |
Go |
Medium |
| 894 |
All Possible Full Binary Trees |
Go |
Medium |
| 895 |
Maximum Frequency Stack |
Go |
Hard |
| 896 |
Monotonic Array |
Go |
Easy |
| 897 |
Increasing Order Search Tree |
Go |
Easy |
| 898 |
Bitwise ORs of Subarrays |
Go |
Medium |
| 899 |
Orderly Queue |
Go |
Hard |
| 900 |
RLE Iterator |
Go |
Medium |
