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

namespace _2011
{
    class Program
    {
        static void Main(string[] args)
        {
            int N = int.Parse(Console.ReadLine());
            if (N > 100 || N < 1)
            {
                Console.WriteLine("No");
                return;
            }

            string[] arrS = Console.ReadLine().Split(' ');
            string[] arrS1 = null;
            if (arrS.Length == 1 && arrS[0].Length > 1)
            {
                arrS1 = new string[arrS[0].Length];
                for (int i = 0; i < arrS[0].Length; i++)
                    arrS1[i] = arrS[0].Substring(i, 1);

            }
            else
                arrS1 = arrS;

            bool blnRes = IsYes(arrS1);
            
            if (blnRes)
                Console.WriteLine("Yes");
            else
                Console.WriteLine("No");
        }

        static bool IsYes(string[] arrS)
        {
            int N = arrS.Length;
            if (N <= 2 || N>100) return false;
            int c1 = 0;
            int c2 = 0;
            int c3 = 0;
            for (int i = 0; i < N; i++)
            {
                switch (arrS[i])
                {
                    case "1":
                        c1++;
                        break;
                    case "2":
                        c2++;
                        break;
                    case "3":
                        c3++;
                        break;
                }
            }
            
            if ((N >= 3 ) && (N<=5))
                if (c1 >= (N - 1) || c2 >= (N - 1) || c3 >= (N - 1)) return false;

            if (N > 5)
                if (c1 == N || c2 == N || c3 == N) return false;

            return true;
        }

    }
}