/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
   static int countSetBits(int n)
    {
        int count = 0;
        while (n != 0)
        {
            count += n & 1;
            n >>>= 1;
        }
        return count;
    }
 
	public static void main (String[] args) throws java.lang.Exception
	{
		System.out.println(countSetBits(-1));
	}
}

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