vip_wesley

原文链接： http://codeforces.com/problemset/problem/219/A A. k-String A string is called a k-string if it can be represented as k concatenated copies of some string. For example, the

原文链接： http://codeforces.com/problemset/problem/208/A  A. Dubstep Vasya works as a DJ in the best Berland nightclub, and he often uses dubstep music in his performance. Recently, he has