uva 11714

#include<stdio.h>
#include<algorithm>
#include<math.h>
using namespace std;
typedef unsigned long long ULL;
int main()
{
    unsigned long long n;

    while(scanf("%llu",&n)==1)
    {
        printf("%llu\n",n-1+(ULL)log2(n-1));
    }
    return (0);
}