1285DDr. Evil Underscores

链接:http://codeforces.com/contest/1285/problem/D D. Dr. Evil Underscores time limit per test1 second memory limit per test256 megabytes inputstandard input outputstandard output Today, as a friendship gift, Bakry gave Badawy n integers a1,a2,...,an and challenged him to choose an integer X such that th