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1 Easy5 Medium1 Hard7 total
| No. | Problem | Difficulty | Frequency |
|---|---|---|---|
| 1803 | Count Pairs With XOR in a Range | Hard | |
| 1042 | Flower Planting With No Adjacent | Medium | |
| 53 | Maximum Subarray | Medium | |
| 15 | 3Sum | Medium | |
| 146 | LRU Cache | Medium | |
| 155 | Min Stack | Medium | |
| 20 | Valid Parentheses | Easy |