output_description: Print the number of the integers between a and b, inclusive, that are
  divisible by x.
  
  * * *
input_description: The input is given from Standard Input in the following format:
  
      
      
      a b x
attempt: A, B, x = map(int, input().split())
  b_d = B // x + 1
  a_d = A // x
  if A != 0:
      a_d += 1
  print(b_d - a_d)
  
problem_description: Statement
  
  You are given nonnegative integers a and b (a ≤ b), and a positive integer x.
  Among the integers between a and b, inclusive, how many are divisible by x?
samples: [{"input": "4 8 2", "output": "3\n    \n\nThere are three integers between 4 and 8, inclusive, that are divisible by 2:\n4, 6 and 8.\n\n* * *"}, {"input": "0 5 1", "output": "6\n    \n\nThere are six integers between 0 and 5, inclusive, that are divisible by 1: 0,\n1, 2, 3, 4 and 5.\n\n* * *"}, {"input": "9 9 2", "output": "0\n    \n\nThere are no integer between 9 and 9, inclusive, that is divisible by 2.\n\n* * *"}, {"input": "1 1000000000000000000 3", "output": "333333333333333333\n    \n\nWatch out for integer overflows."}]