#include <bits/stdc++.h>
using namespace std;
int n,a[1005],s[1005];
int main()
{
    scanf("%d",&n);
    a[0]=s[0]=0;
    for(int i=1;i<=n;i++)
    {
        a[i]=s[i/2]+1;
        s[i]=s[i-1]+a[i];
    }
    printf("%d\n",a[n]);
    return 0;
}