2020年3月17日
换根dp
摘要： "https://codeforces.com/contest/1324/problem/F" description you are given a tree, in which the vertices are all printed either black or white. , find 阅读全文
posted @ 2020-03-17 23:11 xlinsist 阅读(101) 评论(0) 推荐(0)