10 problems
| Name | Difficulty |
|---|---|
| Generate Permutations | Medium |
| Word Search - Find word | Medium |
| Combination Sum | Medium |
| Generate Subsets | Medium |
| Generate Parentheses | Medium |
| Sudoku Solver 4x4 | Medium |
| N-Queens - Placement Count | Hard |
| Word Search - Find all words | Hard |
| Letter Combinations of a Phone Number | Hard |
| Sudoku Solver | Hard |