from fractions import Fraction

def read_int():
    return int(input())

def read_ints():
    return list(map(int, input().split()))

D = read_int()

def f(x):
    y = 0
    while x != 0:
        y += x
        if y == D:
            return True
        x //= 2
    return False

answer = 10 ** 100
for i in range(1, 100):
    # x(1 + 1/2 + 1/4 + 1/8 + ...) ~= D
    x = Fraction(D) / ((1 - Fraction(1, 2) ** i) / (1 - Fraction(1, 2)))
    x = int(x)
    for d in range(-10, 10):
        if x + d >= 1 and f(x + d):
            answer = min(answer, x + d)

print(answer)