10 | Regular Expression Matching | Hard |
17 | Letter Combinations of a Phone Number | Medium |
22 | Generate Parentheses | Medium |
37 | Sudoku Solver | Hard |
39 | Combination Sum | Medium |
40 | Combination Sum II | Medium |
44 | Wildcard Matching | Hard |
46 | Permutations | Medium |
47 | Permutations II | Medium |
51 | N-Queens | Hard |
52 | N-Queens II | Hard |
60 | Permutation Sequence | Medium |
77 | Combinations | Medium |
78 | Subsets | Medium |
79 | Word Search | Medium |
89 | Gray Code | Medium |
90 | Subsets II | Medium |
93 | Restore IP Addresses | Medium |
126 | Word Ladder II | Hard |
131 | Palindrome Partitioning | Medium |
140 | Word Break II | Hard |
401 | Binary Watch | Easy |
967 | Numbers With Same Consecutive Differences | Medium |
980 | Unique Paths III | Hard |
1239 | Maximum Length of a Concatenated String with Unique Characters | Medium |
1601 | Maximum Number of Achievable Transfer Requests | Hard |
1718 | Construct the Lexicographically Largest Valid Sequence | Medium |
1774 | Closest Dessert Cost | Medium |
1980 | Find Unique Binary String | Medium |
2305 | Fair Distribution of Cookies | Medium |