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- C1 - Good Subarrays (Easy Version)(双指针)
- C2. Good Subarrays (Hard Version)(双指针/前缀和/组合数学)
- 摆渡车(二维dp/前缀和)
- D. Edge Split(dfs/图论)
- H - Hot Black Hot White(数论/取模运算)
- G. Garage(数论/规律)
- M. Moving Both Hands(图论/最短路径/dijkstra)
- L. Lemper Cooking Competition(前缀和/逆序对/树状数组/归并排序)
- B. Rule of League(思维)
- D. Slime Escape(贪心/前缀和/模拟)