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 (Clang 3.8.0) (judge verdict: Wrong Answer)

#include <stdio.h>

int main(void){
    int a=0,b=0,c=0,d=0,e=0;
    scanf("%d",&a);
    scanf("%d",&b);
    if(a>b){
        d=1;
        e=0;
        c=1;
    }else{
        c=a-1;
        d=b/c;
        e=b%c;
    }
    if(a==2){
        d--;
        e=0;
    }
    if(e<=1){
        printf("%d",d);
    
    
    }else{
        d++;
        printf("%d",d);
        
    }
    return 0;
}