#include<stdio.h>
#include<iostream>
using namespace std;

int bit(int x)
{
	int i = 1;
	while (x > 1)
	{
		if (x % 2 == 0)
		{
			x = x / 2;
		}
		else
		{
			x = (x - 1) / 2;
			i++;
		}
	}
	return i;
}

int main()
{
	int N, i,j, a[10010] = {};
	cin >> N;
	j = 0;
	a[1] = 1;
	for (j = 1; j <= 5; j++)
	{
		i = 1;
		while (i <= N)
		{
			if (a[i] == 0)
			{
				i++;
				continue;
			}
			if ((a[i + bit(i)] == 0) || (a[i + bit(i)] > a[i]))
			{
				a[i + bit(i)] = a[i] + 1;
			}
			if ((i > bit(i)) && ((a[i - bit(i)] > a[i])||(a[i-bit(i)]==0)))
			{
				a[i - bit(i)] = a[i] + 1;
			}
			i++;
		}
	}

	if(a[N]==0)
	{
		cout << "-1";
	}

	else
	{
		cout << a[N];
	}

		return 0;
}