n = int(input())

a = [float("inf") for _ in range(n * 2 + 10)]
a[1] = 1

b = [0 for _ in range(n * 2 + 10)]
b[0] = 1

s = []
s_1 = [1,1]
s.append(s_1)
while len(s) != 0 and b[n] != 1:
    s.sort()
    t = s.pop(0)
    u = str(bin(t[1])).count("1")
    b[t[1]] = 1
    if t[1] < n:
        if b[t[1] + u] != 1 and a[t[1]] + 1 < a[t[1] + u]:
            a[t[1] + u] = a[t[1]] + 1
            s_1 = [a[t[1]] + 1 , t[1] + u]
            s.append(s_1)
        if b[t[1] - u] != 1 and a[t[1]] + 1 < a[t[1] - u]:
            a[t[1] - u] = a[t[1]] + 1
            s_1 = [a[t[1]] + 1 , t[1] - u]
            s.append(s_1)


if a[n] == float("inf"):
    print(-1)
else:
    print(a[n])