#include<stdio.h>

int main(void) {
	long long int N;
	long long int sumno, sumskill;

	scanf("%lld", &N);

	sumskill = 2 * N;
	sumno = N;

	while (N != 0) {
		N /= 2;
		sumno += N;
	}

	printf("%lld", sumskill - sumno);

	return 0;

}