n = int(input())
bn = [format(x, 'b').count('1') for x in range(n + 1)]

l = [9999999] * (n + 1)
l[1] = 1
change = 1
while change:
    change = 0
    for i in range(1, n + 1):
        for j in (i - bn[i], i + bn[i]):
            if 0 < j <= n:
                if l[j] > l[i] + 1:
                    l[j] = l[i] + 1
                    change += 1

print(l[n] if l[n] < 9999999 else -1)