The number of questions is increasing recently.

For more questions and solutions, you can see my [LintCode](https://github.com/kamyu104/LintCode) repository.

I'll keep updating for full summary and better solutions. Stay tuned for updates.

(Notes: "📖" means you need to subscribe to [LeetCode premium membership](https://leetcode.com/subscribe/) for the access to premium questions.)

355| [Design Twitter](https://leetcode.com/problems/design-twitter/) | [C++](./C++/design-twitter.cpp) [Python](./Python/design-twitter.py) | _O(klogu)_| _O(t + f)_| Hard | LintCode | Heap |

359| [Logger Rate Limiter](https://leetcode.com/problems/logger-rate-limiter/) | [C++](./C++/logger-rate-limiter.cpp) [Python](./Python/logger-rate-limiter.py) | _O(1), amortized_ | _O(k)_| Easy |📖| Deque |

362| [Design Hit Counter](https://leetcode.com/problems/design-hit-counter/) | [C++](./C++/design-hit-counter.cpp) [Python](./Python/design-hit-counter.py) | _O(1), amortized_ | _O(k)_| Medium |📖| Deque |