import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines
sys.setrecursionlimit(10 ** 7)

n = int(read())
ans = 1


def check(k):
    global ans
    v = bin(k).count('1')
    ans += 1
    if ans > 2 * n:
        ans = -1
    elif k + v < n:
        check(k + v)
    elif k + v > n:
        check(k - v)


check(1)
print(ans)