func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n;     cin >> n;     string s;     cin >> s;     if (n == 12) {       string hour =   ;       hour += s[0];       hour += s[1];       string min =   ;       min += s[3];       min += s[4];       if (hour ==  00 ) s[0] =  1 ;       if (stoi(hour) > 12) {         if (s[1] ==  0 )           s[0] =  1 ;         else if (s[1] ==  2  || s[1] ==  1 )           s[0] =  1 ;         else {           s[0] =  0 ;         }       }       if (stoi(min) > 59) {         s[3] =  0 ;       }     } else {       string hour =   ;       hour += s[0];       hour += s[1];       string min =   ;       min += s[3];       min += s[4];       if (stoi(hour) > 23) {         s[0] =  0 ;       }       if (stoi(min) > 59) s[3] =  0 ;     }     cout << s << endl;     return 0;   }   