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>
#include <stdlib.h>

int main()
{
    int N, b1, b2;
    scanf("%2d",&N);
    b1 = N/10;
    b2 = N%10;
    if (b1 == 9 || b2 == 9)
    {
        printf("YES\n\n");
        printf("The one's digit of %d is 9.\n",N);
    }
    else
    {
        printf("NO\n\n");
        printf("%d does not contain 9.\n",N);
    }
    return 0;
}