using System;

class Q0003
{
	public static void Main()
	{
		int n = int.Parse(Console.ReadLine());
		bool[] is_stop = new bool[n];

		int count = 1;
		int prev = -1;
		for(int i=1; ;)
		{
			if (i == n)
			{
				break;
			}

			int add = 0;
			for (int j=i; j>0; j/=2)
			{
				if(j%2 > 0)
				{
					add ++;
				}
			}
			if(i+add > n)
			{
				i -= add;
				if(is_stop[i - 1])
				{
					count = -1;
					break;
				}
			}
			else
			{
				i += add;
			}

			prev = i;
			is_stop[i - 1] = true;
			count++;
		}

		Console.WriteLine(count);
	}
}