#include <stdio.h>

void main(void){
    long long int n = 0;
    scanf("%lld",&n);
    long long int clearPointA = n;
    long long int clearPointB = n*2;
    while(n > 0){
        clearPointA += n/2;
        n = n/2;
    }
    printf("%lld",clearPointB-clearPointA);
    
}