| 801. Minimum Swaps To Make Sequences Increasing | Solution | Solve | Hard | | |
| 802. Find Eventual Safe States | Solution | Solve | Medium | | |
| 803. Bricks Falling When Hit | Solution | Solve | Hard | | |
| 804. Unique Morse Code Words | Solution | Solve | Easy | | |
| 805. Split Array With Same Average | Solution | Solve | Hard | | |
| 806. Number of Lines To Write String | Solution | Solve | Easy | | |
| 807. Max Increase to Keep City Skyline | Solution | Solve | Medium | | |
| 808. Soup Servings | Solution | Solve | Medium | | |
| 809. Expressive Words | Solution | Solve | Medium | | |
| 810. Chalkboard XOR Game | Solution | Solve | Hard | | |
| 811. Subdomain Visit Count | Solution | Solve | Medium | | |
| 812. Largest Triangle Area | Solution | Solve | Easy | | |
| 813. Largest Sum of Averages | Solution | Solve | Medium | | |
| 814. Binary Tree Pruning | Solution | Solve | Medium | | |
| 815. Bus Routes | Solution | Solve | Hard | | |
| 816. Ambiguous Coordinates | Solution | Solve | Medium | | |
| 817. Linked List Components | Solution | Solve | Medium | | |
| 818. Race Car | Solution | Solve | Hard | | |
| 819. Most Common Word | Solution | Solve | Easy | | |
| 820. Short Encoding of Words | Solution | Solve | Medium | | |
| 821. Shortest Distance to a Character | Solution | Solve | Easy | | |
| 822. Card Flipping Game | Solution | Solve | Medium | | |
| 823. Binary Trees With Factors | Solution | Solve | Medium | | |
| 824. Goat Latin | Solution | Solve | Easy | | |
| 825. Friends Of Appropriate Ages | Solution | Solve | Medium | | |
| 826. Most Profit Assigning Work | Solution | Solve | Medium | | |
| 827. Making A Large Island | Solution | Solve | Hard | | |
| 828. Count Unique Characters of All Substrings of a Given String | Solution | Solve | Hard | | |
| 829. Consecutive Numbers Sum | Solution | Solve | Hard | | |
| 830. Positions of Large Groups | Solution | Solve | Easy | | |
| 831. Masking Personal Information | Solution | Solve | Medium | | |
| 832. Flipping an Image | Solution | Solve | Easy | | |
| 833. Find And Replace in String | Solution | Solve | Medium | | |
| 834. Sum of Distances in Tree | Solution | Solve | Hard | | |
| 835. Image Overlap | Solution | Solve | Medium | | |
| 836. Rectangle Overlap | Solution | Solve | Easy | | |
| 837. New 21 Game | Solution | Solve | Medium | | |
| 838. Push Dominoes | Solution | Solve | Medium | | |
| 839. Similar String Groups | Solution | Solve | Hard | | |
| 840. Magic Squares In Grid | Solution | Solve | Medium | | |
| 841. Keys and Rooms | Solution | Solve | Medium | | |
| 842. Split Array into Fibonacci Sequence | Solution | Solve | Medium | | |
| 843. Guess the Word | Solution | Solve | Hard | | |
| 844. Backspace String Compare | Solution | Solve | Easy | | |
| 845. Longest Mountain in Array | Solution | Solve | Medium | | |
| 846. Hand of Straights | Solution | Solve | Medium | | |
| 847. Shortest Path Visiting All Nodes | Solution | Solve | Hard | | |
| 848. Shifting Letters | Solution | Solve | Medium | | |
| 849. Maximize Distance to Closest Person | Solution | Solve | Medium | | |
| 850. Rectangle Area II | Solution | Solve | Hard | | |
