Problem:
Score : 200 points

Problem Statement

Having learned the multiplication table, Takahashi can multiply two integers between 1 and 9 (inclusive) together.

Given an integer N, determine whether N can be represented as the product of two integers between 1 and 9. If it can, print Yes; if it cannot, print No.

Constraints

1 \leq N \leq 100

N is an integer.

Input

Input is given from Standard Input in the following format:

N

Output

If N can be represented as the product of two integers between 1 and 9 (inclusive), print Yes; if it cannot, print No.

Sample Input 1

10

Sample Output 1

Yes

10 can be represented as, for example, 2 \times 5.

Sample Input 2

50

Sample Output 2

No

50 cannot be represented as the product of two integers between 1 and 9.

Sample Input 3

81

Sample Output 3

Yes

Solution in C (GCC 5.4.1) (judge verdict: Accepted)

/* ex3_4
   key_tree */

#include <stdio.h>

// Nを1-9で割った商が1-9かつ余りが0になればよい
int main(void) {
  int N;
  scanf("%d", &N);
  int i = 1;
  // 1-9まで調べる
  while(i < 10){
    int quotient = N / i;
    int remainder = N % i;
    //商が1-9かつ余り0
    if(quotient >= 1 && quotient <= 9 && remainder == 0){
      printf("Yes\n");
      break;/*当てはまったらwhile脱出*/
	}
    i += 1;
  }
  if(i == 10){
    printf("No\n");
  }
  return 0;
}