func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     string s;     cin >> s;     int n = (int)int(s.size());     int num = (s[n - 1] -  0 ) + 10 * (s[n - 2] -  0 );     if (num % 4 == 0)       cout << 4;     else       cout << 0;     return 0;   }   