| 857. Minimum Cost to Hire K Workers | | | Solve | Hard | | |
| 862. Shortest Subarray with Sum at Least K | | | Solve | Hard | | |
| 871. Minimum Number of Refueling Stops | | | Solve | Hard | | |
| 878. Nth Magical Number | | | Solve | Hard | | |
| 879. Profitable Schemes | | | Solve | Hard | | |
| 887. Super Egg Drop | | | Solve | Hard | | |
| 906. Super Palindromes | | | Solve | Hard | | |
| 913. Cat and Mouse | | | Solve | Hard | | |
| 920. Number of Music Playlists | | | Solve | Hard | | |
| 924. Minimize Malware Spread | | | Solve | Hard | | |
| 940. Distinct Subsequences II | | | Solve | Hard | | |
| 952. Largest Component Size by Common Factor | | | Solve | Hard | | |
| 960. Delete Columns to Make Sorted III | | | Solve | Hard | | |
| 968. Binary Tree Cameras | | | Solve | Hard | | |
| 975. Odd Even Jump | | | Solve | Hard | | |
| 992. Subarrays with K Different Integers | | | Solve | Hard | | |
| 995. Minimum Number of K Consecutive Bit Flips | | | Solve | Hard | | |
| 1000. Minimum Cost to Merge Stones | | | Solve | Hard | | |
| 1012. Numbers With Repeated Digits | | | Solve | Hard | | |
| 1032. Stream of Characters | | | Solve | Hard | | |
| 1036. Escape a Large Maze | | | Solve | Hard | | |
| 1074. Number of Submatrices That Sum to Target | | | Solve | Hard | | |
| 1088. Confusing Number II | | | Solve | Hard | | |
| 1092. Shortest Common Supersequence | | | Solve | Hard | | |
| 1096. Brace Expansion II | | | Solve | Hard | | |
| 1106. Parsing A Boolean Expression | | | Solve | Hard | | |
| 1121. Divide Array Into Increasing Sequences | | | Solve | Hard | | |
| 1147. Longest Chunked Palindrome Decomposition | | | Solve | Hard | | |
| 1153. String Transforms Into Another String | | | Solve | Hard | | |
| 1168. Optimize Water Distribution in a Village | | | Solve | Hard | | |
| 1199. Minimum Time to Build Blocks | | | Solve | Hard | | |
| 1206. Design Skiplist | | | Solve | Hard | | |
| 1220. Count Vowels Permutation | | | Solve | Hard | | |
| 1231. Divide Chocolate | | | Solve | Hard | | |
| 1235. Maximum Profit in Job Scheduling | | | Solve | Hard | | |
| 1240. Tiling a Rectangle with the Fewest Squares | | | Solve | Hard | | |
| 1255. Maximum Score Words Formed by Letters | | | Solve | Hard | | |
| 1263. Minimum Moves to Move a Box to Their Target Location | | | Solve | Hard | | |
| 1269. Number of Ways to Stay in the Same Place After Some Steps | | | Solve | Hard | | |
| 1284. Minimum Number of Flips to Convert Binary Matrix to Zero Matrix | | | Solve | Hard | | |
| 1289. Minimum Falling Path Sum II | | | Solve | Hard | | |
| 1293. Shortest Path in a Grid with Obstacles Elimination | | | Solve | Hard | | |
| 1312. Minimum Insertion Steps to Make a String Palindrome | | | Solve | Hard | | |
| 1316. Distinct Echo Substrings | | | Solve | Hard | | |
| 1320. Minimum Distance to Type a Word Using Two Fingers | | | Solve | Hard | | |
| 1326. Minimum Number of Taps to Open to Water a Garden | | | Solve | Hard | | |
| 1345. Jump Game IV | | | Solve | Hard | | |
| 1359. Count All Valid Pickup and Delivery Options | | | Solve | Hard | | |
| 1363. Largest Multiple of Three | | | Solve | Hard | | |
| 1368. Minimum Cost to Make at Least One Valid Path in a Grid | | | Solve | Hard | | |
