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20 problems total
| Title | Difficulty | Videos | Companies |
|---|---|---|---|
| Design LRU Cache | medium | - | |
| Min Stack | medium | - | |
| Binary Search Tree BST Inorder Iterator | medium | - | |
| Implement Trie | medium | ||
| Implement Queue using Stacks | easy | - | |
| Peeking Iterator | medium | - | |
| Find Median from Data Stream | hard | ||
| Serialize and Deserialize Binary Tree | hard | ||
| Flatten Nested List Iterator | medium | - | |
| Data Stream as Disjoint Intervals | hard | - | |
| Design Twitter (Data Structure Design) | medium | - | |
| Design Hit Counter | medium | - | |
| Insert Delete Search and GetRandom in Constant Time 1 - Dupes not allowed | medium | - | |
| Serialize and Deserialize Binary Search Tree BST | medium | - | |
| Encode and Decode TinyURL | medium | - | |
| Design Circular Queue | medium | - | |
| Design HashMap | easy | - | |
| Design Linked List | medium | - | |
| Range Module | hard | - | |
| Time Based Key-Value Store | medium | - |