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12 problems total
| Title | Difficulty | Videos | Companies |
|---|---|---|---|
| De Bruijn Sequence | hard | - | |
| Combination Sum 1 | medium | ||
| Combination Sum 2 - Cant Reuse same element | medium | - | |
| Permutations of Array 1 | medium | - | |
| Permutations of Array 2 - Array has duplicates | medium | - | |
| Word Search 1 - Find if word exists | medium | ||
| Path Sum 2 - find all root to leaf paths | medium | - | |
| Word Ladder 2 - Get all the ladders | hard | - | |
| Lowest Common Ancestor of a Binary Tree | medium | ||
| Factor Combinations | medium | - | |
| Partition to K Equal Sum Subsets | medium | - | |
| Vertical Order Traversal of a Binary Tree | hard | - |