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12 problems total
| Title | Difficulty | Videos | Companies |
|---|---|---|---|
| Validate Binary Search Tree | medium | ||
| Maximum Depth of Binary Tree | easy | ||
| Path Sum 2 - find all root to leaf paths | medium | - | |
| Palindrome Partitioning | medium | ||
| Word Break 1 - Check if word is breakable | medium | ||
| Number of Islands | medium | ||
| Longest Increasing Path in a Matrix | hard | - | |
| Lexicographical Numbers | medium | ||
| Number of Provinces | medium | - | |
| Trim a Binary Search Tree BST | medium | - | |
| Max Area of Island | medium | - | |
| Cousins in Binary Tree | easy | - |