func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     string s;     string aux =  CODEFORCES ;     int i = 0;     cin >> s;     if (s.length() < aux.length())       cout <<  NO  << endl;     else {       while (aux[i] == s[i] && i < aux.length()) i++;       if (i == aux.length())         cout <<  YES  << endl;       else {         int j;         for (j = i; j < aux.length(); j++) {           if (aux[j] != s[s.length() - aux.length() + j]) break;         }         if (j == aux.length())           cout <<  YES  << endl;         else           cout <<  NO  << endl;       }     }     return 0;   }   