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;
        List<int> list = new List<int>();
        n = int.Parse(Console.ReadLine());
        int sum = 0;



        for (int i = 0;i < n;i++){

            int a = int.Parse(Console.ReadLine());
            bool addList = true;

            for (int j = 0; j < list.Count;j++){

                if (list[j] == a)
                {
                    list.RemoveAt(j);
                    sum -= 1;
                    addList = false;
                    break;
                }
            }

            if(addList)
            {
                list.Add(a);
                sum += 1;
            };

        }

        Console.WriteLine(sum);

	}
}