#include <stdio.h>
int main(void){
    long int N;
    long int EXP = 0;
    long int EXP2;

    scanf("%ld",&N);

    EXP2 = N * 2;

    while(N > 0){
        EXP += N;
        N /= 2;
    }

    printf("%ld\n",EXP2 - EXP);

    return 0;
}