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22 problems total
| Title | Difficulty | Videos | Companies |
|---|---|---|---|
| Find if there is a path between two vertices in a directed graph | easy | - | |
| Validate Binary Search Tree | medium | ||
| Binary Tree Traversal - Zigzag Level Order Traversal | medium | - | |
| Maximum Depth of Binary Tree | easy | ||
| Word Ladder 1 - Get Ladder Length | hard | - | |
| Word Break 1 - Check if word is breakable | medium | ||
| Number of Islands | medium | ||
| Least Number of Perfect Squares that Sums to n | medium | - | |
| Pacific Atlantic Water Flow | medium | ||
| Island Perimeter | easy | ||
| 01 Matrix | medium | - | |
| Open the Lock | medium | - | |
| Letter Case Permutation | medium | - | |
| Bus Routes | hard | - | |
| Keys and Rooms | medium | - | |
| Shortest Path to Get All Keys | hard | - | |
| Snakes and Ladders | medium | - | |
| Flip Equivalent Binary Trees | medium | ||
| Cousins in Binary Tree | easy | - | |
| Shortest Path in Binary Matrix | medium | - | |
| Maximum Level Sum of a Binary Tree | medium | - | |
| Path with Maximum Gold | medium |