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