n = int(input())

def without_character(m):
    ret = 0
    while m > 0:
        ret += m
        m >>= 1
    return ret

def with_character(m):
    if m == 0:
        return 0
    return max(2 * m, m + with_character(m >> 1))

print(with_character(n) - without_character(n))