摘要:
题目链接 (Luogu) https://www.luogu.org/problem/P4727 (BZOJ) https://www.lydsy.com/JudgeOnline/problem.php?id=1488 题解 Burnside引理经典题。 首先考虑一个$O(n!\times poly 阅读全文
posted @ 2019-08-03 17:05
suncongbo
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