#include<stdio.h>
int main()
{
	long long int n;
	scanf("%lld", &n);
	long long int a, b;
	a = 0;
	b = 2 * n;
	while (n > 0)
	{
		a += n;
		n /= 2;
	}
	printf("%lld\n", b - a);
	return 0;
}