#include <algorithm>
#include <iostream>
#include <iomanip>
#include <cstring>
#include <string>
#include <vector>
#include <queue>
#include <cmath>
#include <stack>
#include <set>
#include <map>
typedef long long ll;
typedef unsigned int uint;
using namespace std;

int n;
int ans = 0;

void solve(int num) {

	int bis = 1;
	while (num >= bis * 2 ) {
		bis *= 2;
		ans++;
	}
	if (num - bis == 0)
		return ;
	else {
		ans++;
		return ;
	}
}

int main() {
	cin >> n;

	if (n % 2 == 1) {
		ans++;
		n -= 1;
	}
	solve(n);
	cout << ans << endl;
}