摘要：题目链接：http://codeforces.com/problemset/problem/93/B B. End of Exams time limit per test 1 second time limit per test memory limit per test 256 megabyte 阅读全文

摘要：题目链接：https://vjudge.net/contest/239445#problem/E E - Problem Statement You are given nn strings str1,str2,…,strnstr1,str2,…,strn , each consisting of 阅读全文