摘要:
http://codeforces.com/contest/1092/problem/C Ivan wants to play a game with you. He picked some string ss of length nn consisting only of lowercase La 阅读全文
摘要:
http://codeforces.com/contest/1092/problem/B There are nn students in a university. The number of students is even. The ii-th student has programming 阅读全文
摘要:
http://codeforces.com/contest/1092/problem/A You are given two integers nn and kk. Your task is to construct such a string ss of length nn that for ea 阅读全文