func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int num;     string str;     cin >> num;     cin >> str;     if (str[3] >=  6 ) str[3] =  0 ;     if (num == 12) {       if (str[0] >=  2  || (str[0] ==  1  && str[1] >  2 ) ||           (str[0] ==  0  && str[1] ==  0 )) {         str[0] =  0 ;         if (str[1] ==  0 ) str[0] =  1 ;       }     } else if (num == 24) {       if (str[0] >=  3  || (str[0] ==  2  && str[1] >=  4 )) str[0] =  0 ;     }     cout << str << endl;   }   