Problem:
Score : 100 points

Problem Statement

It is September 9 in Japan now.

You are given a two-digit integer N. Answer the question: Is 9 contained in the decimal notation of N?

Constraints

10≤N≤99

Input

Input is given from Standard Input in the following format:

N

Output

If 9 is contained in the decimal notation of N, print Yes; if not, print No.

Sample Input 1

29

Sample Output 1

Yes

The one's digit of 29 is 9.

Sample Input 2

72

Sample Output 2

No

72 does not contain 9.

Sample Input 3

91

Sample Output 3

Yes

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

using System;

class Atcoder61
{
    public static void Main()
    {
        string input = Console.ReadLine();
        char ten = input[0];
        char one = input[1];

        string strten = ten.ToString();
        string strone = one.ToString();

        if (strten == "9" || strone == "9")
            Console.WriteLine("Yes");
        else
            Console.WriteLine("No");
    }
}