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;
class revkuku{
  public static void Main(){
    int num = int.Parse(Console.ReadLine());
    bool flag = false;
    for(int i=1; i<=9 && !flag; i++){
      for(int j=i; j<=9; j++){
        if(i*j == num){
          flag = true;
          break;
        }
      }
    }
    if(flag){
      Console.WriteLine("Yes");
    }
    else{
      Console.WriteLine("No");
    }
  }
}