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 Python (3.8.2) (judge verdict: Wrong Answer)

M, N = input().split()
M=float(M)
N= float(N)

if M >= 2 and M <= 20 and N >= 1 and N <= 20 :
    A = N/M
    cont = 1
    while A > 0:
        #print(N%M)
        if N%M != 0:
            cont+=1
            M+=M
            A=N//M
        elif N%M == 0:
            cont+=1
            break
        else:
            break
    print(cont)