摘要：
题目链接：http://codeforces.com/contest/1333/problem/B time limit per test 1 second memory limit per test 256 megabytes input standard input output standar 阅读全文
摘要：
题目链接：http://codeforces.com/contest/1333/problem/A time limit per test 1 second memory limit per test 256 megabytes input standard input output standar 阅读全文