from collections import deque
from sys import stdin, stdout
input = lambda: stdin.readline().rstrip()
write = stdout.write

def bitCount(i):
    ret = 0
    while i:
        i &= i - 1
        ret += 1
    return ret

def main():
    N = int(input())

    que = deque([1])
    grid = [i for i in range(N + 1)]
    move = [None for _ in [0] * (N + 1)]
    move[1] = 1
    cnt = 1
    while que:
        flag = False
        n = que.popleft()
        i = bitCount(grid[n])
        for j in (n + i, n - i):
            if 0 < j <= N and move[j] is None:
                que.append(j)
                move[j] = cnt + 1
                flag = True
        if flag:
            cnt += 1

    if move[-1] is None:
        print(-1)
    else:
        print(move[-1])

main()