Problem:
Score : 200 points

Problem Statement

Today is August 24, one of the five Product Days in a year.

A date m-d (m is the month, d is the date) is called a Product Day when d is a two-digit number, and all of the following conditions are satisfied (here d_{10} is the tens digit of the day and d_1 is the ones digit of the day):

d_1 \geq 2

d_{10} \geq 2

d_1 \times d_{10} = m

Takahashi wants more Product Days, and he made a new calendar called Takahashi Calendar where a year consists of M month from Month 1 to Month M, and each month consists of D days from Day 1 to Day D.

In Takahashi Calendar, how many Product Days does a year have?

Constraints

All values in input are integers.

1 \leq M \leq 100

1 \leq D \leq 99

Input

Input is given from Standard Input in the following format:

M D

Output

Print the number of Product Days in a year in Takahashi Calender.

Sample Input 1

15 40

Sample Output 1

10

There are 10 Product Days in a year, as follows (m-d denotes Month m, Day d):

4-22

6-23

6-32

8-24

9-33

10-25

12-26

12-34

14-27

15-35

Sample Input 2

12 31

Sample Output 2

5

Sample Input 3

1 1

Sample Output 3

0

Solution in Java (OpenJDK 11.0.6) (judge verdict: Wrong Answer)

import java.util.*;
//import java.math.BigInteger;

public class Main {
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int M = sc.nextInt();
        int D = sc.nextInt();
        int count = 0;
        //String str = sc.next();
        //char[] c = str.toCharArray();
        //int[] p = new int[N];
        //a[0] = Character.getNumericValue(str.charAt(0));
        //boolean test = false;
        
        for(int k=4; k<=M; k++){
        for(int i=2; i<=D/10; i++){
            for(int j=2; j<=9; j++){
                if(i==D/10 && j>=D%10){
                    break;
                }
                if(i*j == k){
                    count++;
                    //System.out.println(i+":"+j);
                }
            }
            //System.out.println(count);
        }
        }
        System.out.println(count);
    }
}