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

namespace Yuki
{
    class Program
    {
        static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine());
            var d = new Dictionary<string, int>();
            for (int i = 0; i < n; i++)
            {
                string s = Console.ReadLine();
                if (d.ContainsKey(s)) d[s] += 1;
                else d.Add(s, 1);
            }

            var k = d.Values.Max();
            if (n % 2 == 1 && k <= (n + 1) / 2)
            {
                Console.WriteLine("YES");
            }
            else if (n % 2 == 0 && k <= n / 2)
            {
                Console.WriteLine("YES");
            }
            else
            {
                Console.WriteLine("NO");
            }
        }
    }
}