package main

import (
	"container/list"
	"fmt"
)

func popcount(x uint64) uint32 {
	x = (x & 0x5555555555555555) + ((x & 0xAAAAAAAAAAAAAAAA) >> 1)
	x = (x & 0x3333333333333333) + ((x & 0xCCCCCCCCCCCCCCCC) >> 2)
	x = (x & 0x0F0F0F0F0F0F0F0F) + ((x & 0xF0F0F0F0F0F0F0F0) >> 4)
	x = (x & 0x00ff00ff00ff00ff) + ((x & 0xff00ff00ff00ff00) >> 8)
	x = (x & 0x0000ffff0000ffff) + ((x & 0xffff0000ffff0000) >> 16)
	x = (x & 0x00000000ffffffff) + ((x & 0xffffffff00000000) >> 32)
	return uint32(x)
}

func main() {
	var n int
	fmt.Scan(&n)
	dp := make([]int, n+1)
	dp[1] = 1
	q := list.New()
	q.PushBack(1)
	for q.Len() > 0 {
		now := q.Remove(q.Front())
		move := int(popcount(uint64(now.(int))))
		for i := -move; i <= move; i += move * 2 {
			next := now.(int) + i
			if next > 1 && next <= n && dp[next] == 0 {
				dp[next] = dp[now.(int)] + 1
				q.PushBack(next)
			}
		}
	}
	if dp[n] == 0 {
		dp[n] = -1
	}
	fmt.Println(dp[n])

}