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

class TEST{
	static void Main(){
		Sol mySol =new Sol();
		mySol.Solve();
	}
}

class Sol{
	public void Solve(){
		
		int max=0;
		foreach(var k in D.Keys){
			max=Math.Max(max,D[k]);
		}
		int rest=N-max;
		Console.WriteLine(max-1>rest?"NO":"YES");
		
		
		
		
	}
	int N;
	Dictionary<String,int> D;
	public Sol(){
		N=ri();
		D=new Dictionary<String,int>();
		for(int i=0;i<N;i++){
			var s=rs();
			if(D.ContainsKey(s)==false)D.Add(s,0);
			D[s]++;
		}
	}

	static String rs(){return Console.ReadLine();}
	static int ri(){return int.Parse(Console.ReadLine());}
	static long rl(){return long.Parse(Console.ReadLine());}
	static double rd(){return double.Parse(Console.ReadLine());}
	static String[] rsa(char sep=' '){return Console.ReadLine().Split(sep);}
	static int[] ria(char sep=' '){return Array.ConvertAll(Console.ReadLine().Split(sep),e=>int.Parse(e));}
	static long[] rla(char sep=' '){return Array.ConvertAll(Console.ReadLine().Split(sep),e=>long.Parse(e));}
	static double[] rda(char sep=' '){return Array.ConvertAll(Console.ReadLine().Split(sep),e=>double.Parse(e));}
}