#include<iostream>
using namespace std;

int a[1024];

int main()
{
    int n;
    int i;
    cin>>n;
    a[0]=1;
    i=0;
    while(a[i]<=n)
    {
        i++;
        a[i]=a[i-1]*2;
    }
//    cout<<a[i]<<endl;
    cout<<n-a[i-1]+i-1<<endl;


}
