('$' means the problem is locked on Leetcode, '*' means the problem is related to Database, '#' means the problem is related to Shell.)
| # | Title | Solution | Difficulty |
|---|---|---|---|
| 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 |