output_description: Print the number of multiples of d among the integers between L and R
  (inclusive).
  
  * * *
input_description: Input is given from Standard Input in the following format:
  
      
      
      L R d
attempt: a, b, c = map(int, input().split())
  if a % c == 0:
      l = a
  else:
      l = (a // c + 1) * c
  if b % c == 0:
      u = b
  else:
      u = (b // c) * c
  # print(l,u)
  print(max(0, (u - l) // c + 1))
  
problem_description: Statement
  
  How many multiples of d are there among the integers between L and R
  (inclusive)?
samples: [{"input": "5 10 2", "output": "3\n    \n\n  * Among the integers between 5 and 10, there are three multiples of 2: 6, 8, and 10.\n\n* * *"}, {"input": "6 20 7", "output": "2\n    \n\n  * Among the integers between 6 and 20, there are two multiples of 7: 7 and 14.\n\n* * *"}, {"input": "1 100 1", "output": "100"}]