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: Runtime Error)

using System;
using System.Collections.Generic;

class Program
{
	static void Main(string[] args)
	{
        int n;
        n = int.Parse(Console.ReadLine());
        int[] list = new int[n];
        int sum = 0;



        for (int i = 0;i < n;i++)
        {
            int a = int.Parse(Console.ReadLine());
            list[i] = a; 
        }

        Array.Sort(list);

        for (int i = 0; i < n;)
        {
            int cc = list[i];
            int f = 0;
            while(i < n && list[i] == cc)
            {
                f++;
                i++;
            }
            sum += f % 2;

        }


        Console.WriteLine(sum);

	}
}