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.Text;
using System.Linq;
 
class AtCoder
{
    static void Main(){
		string[] tmp = Console.ReadLine().Split();
		int a= int.Parse(tmp[0]);
     	int b= int.Parse(tmp[1]);
		int sum=0;
		for(int cnt=0;cnt<=100;cnt++){
			if((a*cnt+(a-cnt))<b){
				continue;
			}else{
				sum=cnt+1;
              	break;
			}
		}
      Console.WriteLine(sum);
    }
}