#include <stdio.h>

int main(void)
{
    long long int n, sum = 0, sums = 0;
    long long int temp = 1;
    scanf("%lld", &n);

    sums = n * 2;

    while (temp > 0) { /* スキル無し */
        sum += n;
        temp = n / 2;
        n   /= 2;
    }


    printf("%lld", sums - sum);

    return 0;
}