#include <stdio.h>

int main(void)
{
  long int a;
  scanf("%ld", &a);
  long int sum_a,sum_b,ans;
  sum_a = 0;
  sum_b=0;

  sum_b = 2*a;
  while(a > 0){
    sum_a += a;
    a = a/2;
  }
 
 
  // printf("%ld", sum_b);
  ans = sum_b - sum_a;

  printf("%ld", ans);

  return 0;
}