using System;
using System.Collections.Generic;
using System.Linq;
using System.Numerics;
using static System.Math;

namespace SortItems
{
    class Program
    {
        static void Main(string[] args)
        {
            var n = int.Parse(Console.ReadLine());
            var d = new Dictionary<string, int>();

            for (var i = 0; i < n; i++)
            {
                var s = Console.ReadLine();
                if (d.ContainsKey(s))
                {
                    d[s]++;
                }
                else
                {
                    d[s] = 1;
                }
            }

            if (d.Values.Max() < (n / 2) + 1)
            {
                Console.WriteLine("YES");
            }
            else
            {
                Console.WriteLine("NO");
            }

        }
    }
}