func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     string s;     cin >> s;     int n = s.size();     n = (s[n - 2] - 48) * 10 + (s[n - 1] - 48);     if (n % 4)       cout <<  0 ;     else       cout <<  4 ;   }   