| 763. Partition Labels | | | Solve | Medium | | |
| 767. Reorganize String | | | Solve | Medium | | |
| 777. Swap Adjacent in LR String | | | Solve | Medium | | |
| 784. Letter Case Permutation | | | Solve | Medium | | |
| 791. Custom Sort String | | | Solve | Medium | | |
| 792. Number of Matching Subsequences | | | Solve | Medium | | |
| 809. Expressive Words | | | Solve | Medium | | |
| 811. Subdomain Visit Count | | | Solve | Medium | | |
| 816. Ambiguous Coordinates | | | Solve | Medium | | |
| 820. Short Encoding of Words | | | Solve | Medium | | |
| 831. Masking Personal Information | | | Solve | Medium | | |
| 833. Find And Replace in String | | | Solve | Medium | | |
| 838. Push Dominoes | | | Solve | Medium | | |
| 842. Split Array into Fibonacci Sequence | | | Solve | Medium | | |
| 848. Shifting Letters | | | Solve | Medium | | |
| 856. Score of Parentheses | | | Solve | Medium | | |
| 880. Decoded String at Index | | | Solve | Medium | | |
| 890. Find and Replace Pattern | | | Solve | Medium | | |
| 893. Groups of Special-Equivalent Strings | | | Solve | Medium | | |
| 916. Word Subsets | | | Solve | Medium | | |
| 921. Minimum Add to Make Parentheses Valid | | | Solve | Medium | | |
| 926. Flip String to Monotone Increasing | | | Solve | Medium | | |
| 937. Reorder Data in Log Files | | | Solve | Medium | | |
| 949. Largest Time for Given Digits | | | Solve | Medium | | |
| 955. Delete Columns to Make Sorted II | | | Solve | Medium | | |
| 966. Vowel Spellchecker | | | Solve | Medium | | |
| 981. Time Based Key-Value Store | | | Solve | Medium | | |
| 984. String Without AAA or BBB | | | Solve | Medium | | |
| 988. Smallest String Starting From Leaf | | | Solve | Medium | | |
| 990. Satisfiability of Equality Equations | | | Solve | Medium | | |
| 1003. Check If Word Is Valid After Substitutions | | | Solve | Medium | | |
| 1016. Binary String With Substrings Representing 1 To N | | | Solve | Medium | | |
| 1023. Camelcase Matching | | | Solve | Medium | | |
| 1041. Robot Bounded In Circle | | | Solve | Medium | | |
| 1048. Longest String Chain | | | Solve | Medium | | |
| 1055. Shortest Way to Form String | | | Solve | Medium | | |
| 1058. Minimize Rounding Error to Meet Target | | | Solve | Medium | | |
| 1061. Lexicographically Smallest Equivalent String | | | Solve | Medium | | |
| 1062. Longest Repeating Substring | | | Solve | Medium | | |
| 1079. Letter Tile Possibilities | | | Solve | Medium | | |
| 1081. Smallest Subsequence of Distinct Characters | | | Solve | Medium | | |
| 1087. Brace Expansion | | | Solve | Medium | | |
| 1100. Find K-Length Substrings With No Repeated Characters | | | Solve | Medium | | |
| 1111. Maximum Nesting Depth of Two Valid Parentheses Strings | | | Solve | Medium | | |
| 1138. Alphabet Board Path | | | Solve | Medium | | |
| 1143. Longest Common Subsequence | | | Solve | Medium | | |
| 1156. Swap For Longest Repeated Character Substring | | | Solve | Medium | | |
| 1166. Design File System | | | Solve | Medium | | |
| 1169. Invalid Transactions | | | Solve | Medium | | |
| 1170. Compare Strings by Frequency of the Smallest Character | | | Solve | Medium | | |
