#include <iostream>
#include <vector>
#include <cmath>
#include <map>
#include <set>
#include <iomanip>
#include <queue>
#include <algorithm>
#include <numeric>
#include <deque>
#include <complex>
#include <cassert>

using namespace std;
using ll = long long;

int main(){

    ll N, M;
    cin >> N;
    M = N;
    while(M % 2 == 0){
        M /= 2;
    }

    if (M == 1) cout << 1 << endl;
    else if (N % 2 == 1) cout << 2 << endl;
    else cout << 3 << endl;

    return 0;
}