#include <bits/stdc++.h>

using namespace std;

int cnt = 0;

int solve(int n) {
    while (n % 2 == 0) {
        n /= 2;
        cnt++;
    }

    if (n == 1) {
        return cnt;
    } else {
        cnt++;
        return solve(n + 1);
    }
}

int main() {
    int n;
    cin >> n;
    
    cout << solve(n) << endl;
    return 0;
}