摘要：题面:https://www.luogu.org/problem/P2607 cpp 没有上司的舞会+环套树(破环为链)。。。 Code: include include include include include include include include using namespace 阅读全文

摘要：题面:https://www.luogu.org/problem/P5022 cpp 本题显然是一个基环树,然后由于一个基环上n条边只会走n 1条边,所以只要枚举要删的边再求解即可。 Code: include include include include include include incl 阅读全文