# -*- coding: utf-8 -*-
"""
No.378 名声値を稼ごう
https://yukicoder.me/problems/no/378

"""
import sys
from sys import stdin
input = stdin.readline


def calc_point(N):
    ans = N
    while N:
        ans += (N // 2)
        N //= 2
    return ans


def main(args):
    N = int(input())
    p1 = calc_point(N)
    p2 = N * 2
    print(p2 - p1)


if __name__ == '__main__':
    main(sys.argv[1:])