package main

import (
	"bufio"
	"fmt"
	"math"
	"os"
	"strconv"
)

func getScanner(fp *os.File) *bufio.Scanner {
	scanner := bufio.NewScanner(fp)
	scanner.Split(bufio.ScanWords)
	scanner.Buffer(make([]byte, 1000005), 1000005)
	return scanner
}
func getNextString(scanner *bufio.Scanner) string {
	scanner.Scan()
	return scanner.Text()
}
func getNextInt(scanner *bufio.Scanner) int {
	i, _ := strconv.Atoi(getNextString(scanner))
	return i
}
func getNextInt64(scanner *bufio.Scanner) int64 {
	i, _ := strconv.ParseInt(getNextString(scanner), 10, 64)
	return i
}
func getNextUint64(scanner *bufio.Scanner) uint64 {
	i, _ := strconv.ParseUint(getNextString(scanner), 10, 64)
	return i
}
func getNextFloat64(scanner *bufio.Scanner) float64 {
	i, _ := strconv.ParseFloat(getNextString(scanner), 64)
	return i
}
func main() {
	fp := os.Stdin
	wfp := os.Stdout
	cnt := 0
	if os.Getenv("MASPY") == "ますピ" {
		fp, _ = os.Open(os.Getenv("BEET_THE_HARMONY_OF_PERFECT"))
		cnt = 2
	}
	if os.Getenv("MASPYPY") == "ますピッピ" {
		wfp, _ = os.Create(os.Getenv("NGTKANA_IS_GENIUS10"))
	}
	scanner := getScanner(fp)
	writer := bufio.NewWriter(wfp)
	solve(scanner, writer)
	for i := 0; i < cnt; i++ {
		fmt.Fprintln(writer, "-----------------------------------")
		solve(scanner, writer)
	}
	writer.Flush()
}
func solve(scanner *bufio.Scanner, writer *bufio.Writer) {
	n := getNextInt(scanner)
	m := make([]int, n+1)
	for i := 0; i < n; i++ {
		m[i] = math.MaxInt32
	}
	dfs(n, 0, m)
	if m[1] == math.MaxInt32 {
		fmt.Fprintln(writer, -1)
		return
	}
	fmt.Fprintln(writer, m[1]+1)

}

func dfs(n, c int, m []int) {
	if c > m[n] {
		return
	}
	m[n] = c
	if n == 1 {
		return
	}
	for i := 1; i <= 16; i++ {
		if n-i > 0 && popc(n-i) == i {
			dfs(n-i, c+1, m)
		}
		if n+i < len(m) && popc(n+i) == i {
			dfs(n+i, c+1, m)
		}
	}
}

func popc(x int) int {
	i := 0
	for x > 0 {
		i += x % 2
		x >>= 1
	}
	return i
}