func_code_string: #include <bits/stdc++.h>   using namespace std;   char question[4][100];   int len[4];   int main() {     for (int i = 0; i < 4; i++) {       cin >> question[i];       string s = question[i];       len[i] = s.size() - 2;     }     int count_ = 0;     int index = -1;     for (int i = 0; i < 4; i++) {       int n;       n = len[0];       len[0] = len[i];       len[i] = n;       if (((len[0] <= (len[1] / 2)) && (len[0] <= (len[2] / 2)) &&            (len[0] <= (len[3] / 2))) ||           ((len[0] >= (2 * len[1])) && (len[0] >= (2 * len[2])) &&            (len[0] >= (2 * len[3])))) {         index = i;         count_++;       }     }     if (count_ == 1) {       cout << (char)(index + 65);     } else {       cout <<  C ;     }     return 0;   }   