Educational Codeforces Round 94 (Rated for Div. 2)
A - String Similarity分析可知可构造w[i]=s[2*i]即可满足题意#define IO ios::sync_with_stdio(false);cin.tie();cout.tie(0)#pragma GCC optimize(2)#include<string>#include<cstring>#include<iostream>#include<algorithm&
