#include<bits/stdc++.h>
// #include<atcoder/all>
// #include<boost/multiprecision/cpp_int.hpp>

using namespace std;
// using namespace atcoder;
// using bint = boost::multiprecision::cpp_int;
using ll = long long;
using ull = unsigned long long;
using P = pair<int,int>;
#define rep(i,n) for(ll i = 0;i < (ll)n;i++)
#define ALL(x) (x).begin(),(x).end()
// #define MOD 1000000007
#define MOD 998244353


int main(){
  
  ll n;
  cin >> n;
  rep(i,40){
    if(n == 1ll << i){
      cout << "1\n";
      return 0;
    }
  }
  if(n & 1)cout << "2\n";
  else cout << "3\n";
  

  return 0;
}