#include <iostream>
using namespace std;

int main()
{
    int n;
    cin >> n;
    if (n % 2)
    {
        cout << 2 << endl;
        return 0;
    }
    while (n % 2 == 0)
    {
        n /= 2;
    }
    if (n == 1)
    {
        cout << 1 << endl;
    }
    else
    {
        cout << 3 << endl;
    }
}