Problem:
Score : 200 points

Problem Statement

Having learned the multiplication table, Takahashi can multiply two integers between 1 and 9 (inclusive) together.

Given an integer N, determine whether N can be represented as the product of two integers between 1 and 9. If it can, print Yes; if it cannot, print No.

Constraints

1 \leq N \leq 100

N is an integer.

Input

Input is given from Standard Input in the following format:

N

Output

If N can be represented as the product of two integers between 1 and 9 (inclusive), print Yes; if it cannot, print No.

Sample Input 1

10

Sample Output 1

Yes

10 can be represented as, for example, 2 \times 5.

Sample Input 2

50

Sample Output 2

No

50 cannot be represented as the product of two integers between 1 and 9.

Sample Input 3

81

Sample Output 3

Yes

Solution in C# (Mono 4.6.2.0) (judge verdict: Accepted)

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

namespace AtCoder_Cs
{
    public class Program
    {
        public static void Main()
        {
            var N = int.Parse(Console.ReadLine());
            string ret = "No";

            if (IsHitPattern(N))
            {
                ret = "Yes";
            }
            Console.WriteLine($"{ret}");
        }

        private static bool IsHitPattern(int N)
        {
            var num = new int[] { 1, 2, 3, 4, 5, 6, 7, 8, 9 };
            var lst = new HashSet<int>();

            foreach (int i in num)
            {
                foreach (int j in num)
                {
                    lst.Add(i * j);
                }

            }

            return lst.Contains(N);
        }
    }
}