#include <iostream>
#include <string>
using namespace std;

int main()
{
    string a;
    getline(cin, a);

    char x, y;

    if (a.size() > 1)
        x = a[a.size() - 2];
    else
        x = 0;
    y = a[a.size() - 1];

    int num = x * 10 + y;

    if (num % 4 == 0)
        cout << 4 << endl;
    else
        cout << 0 << endl;
    return 0;
}