#include <bits/stdc++.h>
#include <iostream>
#include <string>
using namespace std;

int main() {

int n;
int count=0;
cin>>n;
while(n!=1){
	n=n/2;
	if(n==2){
		count-=1;
	}
	count+=1;
}
cout<<count+1<<endl;
}