摘要：C. Bunstime limit per test2 secondsmemory limit per test256 megabytesinputstandard inputoutputstandard outputLavrenty, a baker, is going to make several buns with stuffings and sell them.Lavrenty has n grams of dough as well as m different stuffing types. The stuffing types are numerated from 1 to m 阅读全文

摘要：刚开始，没什么思路，后来才知道要用到polya定理，本来还以为是一道排列问题，最后却变成了一道群的轮换问题，最后由于数据非常大，又要mod除法运算，因此要求乘法逆元。polya定理 参考：http://www.docin.com/p-43391964.html http://www.cppblog.com/sdfond/archive/2010/02/06/107403.aspx http://hi.baidu.com/lewutian/blog/item/c75dff06c4693f6a03088100.htmlmod除法运算：http://wenku.baidu.com/view/6f28 阅读全文

摘要：最近在学习一些图论的基本算法，上网查了下深搜，发现了这个网址写的不错：http://iprai.hust.edu.cn/icl2002/algorithm/algorithm/commonalg/graph/traversal/dfs.htm 阅读全文