func_code_string: #include <bits/stdc++.h>   int main() {     std::ios::sync_with_stdio(false);     std::string name;     std::cin >> name;     bool atFlag = false;     std::string result =   ;     result += name[0];     for (int i = 1; i < name.length(); i++) {       if (!atFlag && name.substr(i, 2) ==  at ) {         result +=  @ ;         ++i;         atFlag = true;       } else if (i + 3 < name.length() && name.substr(i, 3) ==  dot ) {         result +=  . ;         i += 2;       } else {         result += name[i];       }     }     std::cout << result;     return 0;   }   