func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     ios::sync_with_stdio(0);     cin.tie(0);     cout.tie(0);     string start;     string end;     cin >> start;     cin >> end;     int startInt = (stoi(start.substr(0, 3))) * 60 + (stoi(start.substr(3, 5)));     int endInt = (stoi(end.substr(0, 3))) * 60 + (stoi(end.substr(3, 5)));     int dif = (endInt - startInt) / 2;     int hoursToAdd = dif / 60;     int minutesToAdd = dif % 60;     int first = (stoi(start.substr(0, 3)) + hoursToAdd);     int second = (stoi(start.substr(3, 5)) + minutesToAdd);     first += second / 60;     second = second % 60;     string firstS = to_string(first);     string secondS = to_string(second);     if (firstS.size() == 1) firstS.insert(0,  0 );     if (secondS.size() == 1) secondS.insert(0,  0 );     cout << firstS <<  :  << secondS <<   n ;   }   