摘要: 题目链接:http://codeforces.com/contest/689/problem/D D. Friends and Subsequences time limit per test 2 seconds memory limit per test 512 megabytes input s 阅读全文
posted @ 2016-07-22 02:39 EthanHe 阅读(158) 评论(0) 推荐(0)