#include<bits/stdc++.h>

using namespace std;
using ll = long long;

int main(){
    ll n;
    cin >> n;
    
    if(__builtin_popcount(n) == 1){
        cout << 1 << endl;
        return 0;
    }

    if(n % 2 == 0){
        cout << 3 << endl;
        return 0;
    }
    if(n % 2 == 1){
        cout << 2 << endl;
        return 0;
    }
}