output_description: Print the minimum number of power strips required.
  
  * * *
input_description: Input is given from Standard Input in the following format:
  
      
      
      A B
attempt: A, B = map(int, input().split())
  
  if B == 1:
      print(0)
  
  if A >= B:
      print(1)
  if (2 * A - 1) >= B:
      print(2)
  if (3 * A - 2) >= B:
      print(3)
  if (4 * A - 3) >= B:
      print(4)
  if (5 * A - 4) >= B:
      print(5)
  if (6 * A - 5) >= B:
      print(6)
  if (7 * A - 6) >= B:
      print(7)
  if (8 * A - 7) >= B:
      print(8)
  if (9 * A - 8) >= B:
      print(9)
  if (10 * A - 9) >= B:
      print(10)
  if (11 * A - 10) >= B:
      print(11)
  if (12 * A - 11) >= B:
      print(12)
  if (13 * A - 12) >= B:
      print(13)
  if (14 * A - 13) >= B:
      print(14)
  if (15 * A - 14) >= B:
      print(15)
  if (16 * A - 15) >= B:
      print(16)
  if (17 * A - 16) >= B:
      print(17)
  if (18 * A - 17) >= B:
      print(18)
  if (19 * A - 18) >= B:
      print(19)
  if (20 * A - 19) >= B:
      print(20)
  
problem_description: 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.
samples: [{"input": "4 10", "output": "3\n    \n\n3 power strips, each with 4 sockets, extend the socket into 10 empty sockets.\n\n* * *"}, {"input": "8 9", "output": "2\n    \n\n2 power strips, each with 8 sockets, extend the socket into 15 empty sockets.\n\n* * *"}, {"input": "8 8", "output": "1"}]