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 (GCC 5.4.1) (judge verdict: Wrong Answer)

#include<stdio.h>
int main() {
	int N;
	scanf("%d", &N);
	if (N >= 10 && N <= 100) {
		if (N >= 90 && N <= 99) {
			printf("Yes");
		}
		else {
			switch (N) {
			case 19:printf("Yes\nThe one's digit of 19 is 9."); break;
			case 29:printf("Yes\nThe one's digit of 29 is 9."); break;
			case 39:printf("Yes\nThe one's digit of 39 is 9."); break;
			case 49:printf("Yes\nThe one's digit of 49 is 9."); break;
			case 59:printf("Yes\nThe one's digit of 59 is 9."); break;
			case 69:printf("Yes\nThe one's digit of 69 is 9."); break;
			case 79:printf("Yes\nThe one's digit of 79 is 9."); break;
			case 89:printf("Yes\nThe one's digit of 89 is 9."); break;
			default:printf("%d", N);
			}
		}
	}
	
	
	return 0;
}