#include <stdio.h>

int main(void) {
	
	long long int n, normal = 0, skill = 0;
	
	scanf("%lld", &n);
	skill = n + n;
	while(n > 0){
		normal += n;
		n /= 2;
	}
	printf("%lld\n", skill - normal);
	
	return 0;
}