Score : 200 points
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.
Input is given from Standard Input in the following format:
A B
Print the minimum number of power strips required.
4 10
3
3 power strips, each with 4 sockets, extend the socket into 10 empty sockets.
8 9
2
2 power strips, each with 8 sockets, extend the socket into 15 empty sockets.
8 8
1