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

namespace YukiCoder
{
    class Program
    {
        static void Main(string[] args)
        {
            var va = new List<string>();
            int nn = int.Parse(Console.ReadLine());
            for (int i = 0; i < nn; i++)
            {
                va.Add(Console.ReadLine());
            }
            int nMax = va.GroupBy(a => a).Max(c=>c.Count());
            string S = va.Count() - nMax >= nMax - 1 ? "YES" : "NO";
            Console.WriteLine(S);
            Console.ReadLine();
        }
    }
}