摘要: 题面 传送门:http://codeforces.com/problemset/problem/691/E E. Xor-sequences time limit per test3 seconds memory limit per test256 megabytes inputstandard i 阅读全文
posted @ 2018-05-15 20:10 birchtree 阅读(254) 评论(0) 推荐(0) 编辑