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 C# (Mono 4.6.2.0) (judge verdict: Wrong Answer)

using System;
class a{
  public static void Main()
        {
            string[] str = Console.ReadLine().Split(' ');
            int m = int.Parse(str[0]);
            int d = int.Parse(str[1]);
            int d10 = 0;

            while (d >= 10)
            {
                d -= 10;
                d10++;
            }
            int d1=d;
            int count = 0;
            for(int i = 2; i < d10; i++)
            {
                for(int j = 2; j < 10; j++)
                {
                    if (i * j <= m)
                    {
                        count++;
                    }
                }
            }
            for(int i = 2; i < d1; i++)
            {
                while (i * d10 <= m)
                {
                    count++;
                }
            }
            Console.WriteLine(count);
        }
}