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30 problems total
| Title | Difficulty | Videos | Companies |
|---|---|---|---|
| Design LRU Cache | medium | - | |
| Min Stack | medium | - | |
| Binary Search Tree BST Inorder Iterator | medium | - | |
| Implement Trie | medium | ||
| Implement stack using queues | easy | - | |
| Implement Queue using Stacks | easy | - | |
| Encode and Decode Strings | medium | ||
| Find Median from Data Stream | hard | ||
| Serialize and Deserialize Binary Tree | hard | ||
| Range Sum Query - Immutable | easy | - | |
| Flatten Nested List Iterator | medium | - | |
| Moving Average of Last N numbers in a Stream | easy | - | |
| Design Tic-Tac-Toe | medium | - | |
| Design Snake Game | medium | - | |
| Logger Rate Limiter | easy | - | |
| Design Hit Counter | medium | - | |
| Insert Delete Search and GetRandom in Constant Time 1 - Dupes not allowed | medium | - | |
| Shuffle an Array | medium | - | |
| All O`one Data Structure | hard | ||
| LFU Cache | hard | - | |
| Encode and Decode TinyURL | medium | - | |
| Design Search Autocomplete System | hard | - | |
| Kth Largest Element in a Stream | easy | ||
| Max Stack | hard | - | |
| Maximum Frequency Stack | hard | - | |
| Number of Recent Calls | easy | - | |
| Two City Scheduling | medium | - | |
| Design A Leaderboard | medium | - | |
| Design Browser History | medium | - | |
| Find the Winner of the Circular Game | medium |