loud专题

Codeforces Round #383 (Div. 2) C. Arpa's loud Owf and Mehrdad's evil plan —— DFS找环

题目链接:http://codeforces.com/contest/742/problem/C   C. Arpa's loud Owf and Mehrdad's evil plan time limit per test 1 second memory limit per test 256 megabytes input standard input output