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>

unsigned com(const void* a, const void* b){
    return *(unsigned*)a - *(unsigned*)b; 
}

int main(void){
    int n;
    scanf("%d", &n);
    unsigned a[n];
    for(int i=0;i<n;i++){
        scanf("%u", &a[i]);
    }
    qsort(a, n, sizeof(a[0]), com);
    int m=0, p=0;
    for(unsigned k=a[0];k<=a[n-1];k++){
        for(int j=0;j<n;j++){
            if(a[j]==k){
                m++;
            }
        }
        if(m%2){
            p++;
        }
        m = 0;
    }
    printf("\n%d", p);
    return 0;
}