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20 problems total
| Title | Difficulty | Videos | Companies |
|---|---|---|---|
| Coins In a Line Game | medium | - | |
| 3Sum0 - Find three elements in an array that sum to a zero | medium | ||
| Letter Combinations of a Phone Number | medium | - | |
| Shortest substring containing all characters in a set | medium | - | |
| Shortest Unique Prefix | medium | - | |
| Shortest Uphill-Downhill Route for a Competitive Runner | medium | - | |
| Simulating an Unbiased Coin Toss Using a Biased Coin | medium | - | |
| Combination Sum 1 | medium | ||
| Edit Distance | medium | - | |
| Decode Ways | medium | ||
| Construct Binary Tree from Inorder and Preorder Traversal | medium | ||
| Word Break 1 - Check if word is breakable | medium | ||
| Compare Version Numbers | medium | ||
| Number of Islands | medium | ||
| Implement Trie | medium | ||
| Encode and Decode Strings | medium | ||
| Find the Celebrity | medium | - | |
| Squirrel Simulation | medium | - | |
| Pancake Sorting | medium | - | |
| Time Based Key-Value Store | medium | - |