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

namespace _073A_September9
{
    class Program
    {
        static void Main(string[] args)
        {
            String n; //文字列型変数
            n = Console.ReadLine();//
            if (n[0] == '9' || n[1] == '9')//キーボードから文字列を読み込む
                Console.WriteLine("Yes");//1文字目が'9'または2文字目が'9'なら”Yes”
            else
                Console.WriteLine("No");//それ以外は"No"
            Console.ReadKey();//キー入力待
          
        }
    }
}