Problem:
Score : 200 points

Problem Statement

Takahashi's house has only one socket.

Takahashi wants to extend it with some number of power strips, each with A sockets, into B or more empty sockets.

One power strip with A sockets can extend one empty socket into A empty sockets.

Find the minimum number of power strips required.

Constraints

All values in input are integers.

2 \leq A \leq 20

1 \leq B \leq 20

Input

Input is given from Standard Input in the following format:

A B

Output

Print the minimum number of power strips required.

Sample Input 1

4 10

Sample Output 1

3

3 power strips, each with 4 sockets, extend the socket into 10 empty sockets.

Sample Input 2

8 9

Sample Output 2

2

2 power strips, each with 8 sockets, extend the socket into 15 empty sockets.

Sample Input 3

8 8

Sample Output 3

1

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

using System;
using System.Linq;

class Hello
{

    static void Main(string[] args)
    {
        int count = 0;
        var AB = Console.ReadLine().Split(' ');
        var AC =int.Parse( AB[0]);
        var BB = int.Parse(AB[1]);
        for (int i = 1; i <BB; i++)
        {
            if (AC == BB)
            {
                count += 1;
                break;
            }
            if (AC * i > BB)
            {
                count = count + i;
                break;
            }
        }
        Console.WriteLine(count);
    }
}