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19 problems total
| Title | Difficulty | Videos | Companies |
|---|---|---|---|
| Generate Parentheses | medium | - | |
| Sudoku Solver | hard | - | |
| Combination Sum 2 - Cant Reuse same element | medium | - | |
| Permutations of Array 1 | medium | - | |
| Permutations of Array 2 - Array has duplicates | medium | - | |
| N-Queens | hard | - | |
| Subsets 1 | medium | ||
| Word Search 1 - Find if word exists | medium | ||
| Restore IP Addresses | medium | - | |
| Unique BSTs 2 - Generate | medium | - | |
| Path Sum 2 - find all root to leaf paths | medium | - | |
| Palindrome Partitioning | medium | ||
| Word Break 1 - Check if word is breakable | medium | ||
| Lowest Common Ancestor of a Binary Tree | medium | ||
| Binary Tree Path - All root to leaf paths | easy | - | |
| Longest Increasing Path in a Matrix | hard | - | |
| Next Closest Time | medium | - | |
| Vertical Order Traversal of a Binary Tree | hard | - | |
| Brace Expansion II | hard | - |