A. Dividing Orange

  • 模拟。

B. Undoubtedly Lucky Numbers

  • 暴力枚举\(x、y\)。

C. The Brand New Function

  • 固定左端点,右端点右移时,\(f(l,r)\)是递增的,并且最多\(\log{10^6}\)种值。

D. Hydra

  • 枚举边,每个端点最多枚举\(h+t+1\)个点。

E. Colorado Potato Beetle

  • 考虑压缩整个网格。
  • 离散的图为\(3n\cdot 3n\),然后bfs即可。

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