#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include <map>
#include <queue>
typedef long long ll;
using namespace std;
#define rep(i, n) for (int i = 0; i <= (int)(n); i++)
#define mod 1000000007

int main(){
	int N;
	cin >> N;
	int cnt = 0;
	int p = 0;
	if(N % 2 == 0){
	while(N % 2 == 0){
		N /= 2;
		cnt++;
	 }
	cout << cnt << endl;
	}
	else if(N % 2 != 0){
		while(N % 2 == 1){
			N /= 2;
			p++;
		}
		cout << p << endl;
	}
	
}