using System;
using System.Linq;

namespace No99_JumpingPiece
{
    internal class Program
    {
        static void Main(string[] args) {
            int n = int.Parse(Console.ReadLine());
            long[] array = Array.ConvertAll(Console.ReadLine().Split(' '), x => long.Parse(x));
            Console.WriteLine(Math.Abs(array.Count(x => x % 2 == 0) - array.Count(x => Math.Abs(x) % 2 == 1)));
        }
    }
}