using System;
using System.Linq;
using System.Collections.Generic;
using System.Collections;

namespace Algorithm
{
    class Program
    {
        static void Main(string[] args)
        {
            var n = int.Parse(Console.ReadLine());
            var a = Console.ReadLine().Split().Select(int.Parse).ToArray();

            var div = n / 2;
            if (n % 2 == 1) div++;

            var dict = new Dictionary<int, int>();
            for (var i = 0; i < n; i++)
            {
                if (dict.ContainsKey(a[i]))
                    dict[a[i]]++;
                else
                    dict[a[i]] = 1;
            }

            var count = dict.Values.Max();

            Console.WriteLine(Math.Max(div, count));
        }
    }
}