func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     string s;     char mi, ma;     int max = 0, min = INT_MAX;     pair<int, char> p[4];     for (int i = 0; i < 4; ++i) {       cin >> s;       p[i].first = s.length() - 2;       p[i].second = s[0];     }     sort(p, p + 4);     int flag1 = 0, flag2 = 0;     for (int j = 1; j < 4; ++j) {       if (2 * (p[0].first) <= p[j].first) flag1 += 1;     }     for (int j = 0; j < 3; ++j) {       if (p[3].first >= 2 * (p[j].first)) flag2 += 1;     }     if (flag1 == 3 && flag2 != 3)       cout << p[0].second <<   n ;     else if (flag2 == 3 && flag1 != 3)       cout << p[3].second <<   n ;     else       cout <<  C n ;     return 0;   }   