| No. | Title | Mark |
|---|---|---|
| 225 | Implement Stack using Queues | |
| 232 | Implement Queue using Stacks | |
| 239 | Sliding Window Maximum | |
| 641 | Design Circular Deque | design |
| 622 | Design Circular Queue | design |
| 862 | Shortest Subarray with Sum at Least K | |
| 918 | Maximum Sum Circular Subarray | |
| 1670 | Design Front Middle Back Queue | design |