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「AtCoder Grand Contest 005」F. Many Easy Problems | Trisolaris's Blog #66

Open Marcythm opened 5 years ago

Marcythm commented 5 years ago

https://blog.trisolaris.top/agc005f/

Problem Description 给定一棵 n 个点的树，定义 f(k) ： f(k)=\sum_{S\subseteq V,|S| = k}\left|g(S)\right| 其中 g(S)