C卄没编译失败啊?
#include<bits/stdc++.h> using namespace std; int main(){ string s1,s2,s3; cin>>s1>>s2>>s3; cout<<s1=="BEGINNING"?s3[0]:s1=="MIDDLE"?s3[s3.size()/2+1]:s3[s3.size()]<<'\n';//有点皮 return 0; }