from collections import deque
import copy
import math

N = int(input())
if N == 1:
    print(0)
else:
    ans, already, que = 1, set([1]), deque([1])
    while len(que) > 0:
        nque = deque()
        while len(que) > 0:
            n = que.popleft()
            k, step = n, 0
            while k > 0:
                step += k % 2
                k >>= 1
            if n - step >= 1 and n - step not in already:
                nque.append(n - step)
                already.add(n - step)
            if n + step < N and n + step not in already:
                nque.append(n + step)
                already.add(n + step)
            elif n + step == N:
                print(ans + 1)
                exit()
        que = copy.copy(nque)
        ans += 1
print(-1)