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 num,i,a;
  printf("put number\n");
  a=scanf("%d",&num);

  if(90<=num && num<100){
    printf("Yes\n");
    return 0;
  }
  
  for(i=90;i>=0;i=i-10){
    if((num-i)==9){
      printf("Yes\n");
    return 0;
    }
  }

  printf("No\n");

}