#include <stdio.h>

int main() {
	long long int n, a, min, max;

	scanf("%lld", &n);
	
	min = a = n;
	max = n * 2;
	while (a > 0) {
		min += a = a / 2;
	}

	printf("%lld\n", max - min);

	return 0;
}