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));} }