using System;

public class Hello
{
    public static void Main()
    {
        var n = int.Parse(Console.ReadLine().Trim());
        string[] line = Console.ReadLine().Trim().Split(' ');
        var a = Array.ConvertAll(line, int.Parse);
        var odd = 0; var even = 0;
        for (int i = 0; i < n; i++)
            if (n % 2 == 0) even++;
            else odd++;
        Console.WriteLine(Math.Abs(odd - even));
    }
}