| 772. Basic Calculator III | Solution | Solve | Hard | | |
| 773. Sliding Puzzle | Solution | Solve | Hard | | |
| 774. Minimize Max Distance to Gas Station | Solution | Solve | Hard | | |
| 778. Swim in Rising Water | Solution | Solve | Hard | | |
| 780. Reaching Points | Solution | Solve | Hard | | |
| 782. Transform to Chessboard | Solution | Solve | Hard | | |
| 793. Preimage Size of Factorial Zeroes Function | Solution | Solve | Hard | | |
| 798. Smallest Rotation with Highest Score | Solution | Solve | Hard | - | |
| 801. Minimum Swaps To Make Sequences Increasing | Solution | Solve | Hard | | |
| 803. Bricks Falling When Hit | Solution | Solve | Hard | | |
| 805. Split Array With Same Average | Solution | Solve | Hard | | |
| 810. Chalkboard XOR Game | Solution | Solve | Hard | | |
| 815. Bus Routes | Solution | Solve | Hard | | |
| 818. Race Car | Solution | Solve | Hard | | |
| 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 | | |
| 834. Sum of Distances in Tree | Solution | Solve | Hard | | |
| 839. Similar String Groups | Solution | Solve | Hard | | |
| 843. Guess the Word | Solution | Solve | Hard | | |
| 847. Shortest Path Visiting All Nodes | Solution | Solve | Hard | | |
| 850. Rectangle Area II | Solution | Solve | Hard | | |
| 854. K-Similar Strings | Solution | Solve | Hard | | |
| 857. Minimum Cost to Hire K Workers | Solution | Solve | Hard | | |
| 862. Shortest Subarray with Sum at Least K | Solution | Solve | Hard | | |
| 864. Shortest Path to Get All Keys | Solution | Solve | Hard | | |
| 871. Minimum Number of Refueling Stops | Solution | Solve | Hard | | |
| 878. Nth Magical Number | Solution | Solve | Hard | | |
| 879. Profitable Schemes | Solution | Solve | Hard | | |
| 882. Reachable Nodes In Subdivided Graph | Solution | Solve | Hard | | |
| 887. Super Egg Drop | Solution | Solve | Hard | | |
| 891. Sum of Subsequence Widths | Solution | Solve | Hard | - | |
| 895. Maximum Frequency Stack | Solution | Solve | Hard | | |
| 899. Orderly Queue | Solution | Solve | Hard | | |
| 902. Numbers At Most N Given Digit Set | Solution | Solve | Hard | | |
| 903. Valid Permutations for DI Sequence | Solution | Solve | Hard | - | |
| 906. Super Palindromes | Solution | Solve | Hard | | |
| 913. Cat and Mouse | Solution | Solve | Hard | | |
| 920. Number of Music Playlists | Solution | Solve | Hard | | |
| 924. Minimize Malware Spread | Solution | Solve | Hard | | |
| 927. Three Equal Parts | Solution | Solve | Hard | | |
| 928. Minimize Malware Spread II | Solution | Solve | Hard | | |
| 936. Stamping The Sequence | Solution | Solve | Hard | | |
| 940. Distinct Subsequences II | Solution | Solve | Hard | | |
| 943. Find the Shortest Superstring | Solution | Solve | Hard | | |
| 952. Largest Component Size by Common Factor | Solution | Solve | Hard | | |
| 956. Tallest Billboard | Solution | Solve | Hard | | |
| 960. Delete Columns to Make Sorted III | Solution | Solve | Hard | | |
| 964. Least Operators to Express Number | Solution | Solve | Hard | | |
| 968. Binary Tree Cameras | Solution | Solve | Hard | | |
