text: # Multiples of 3 and 5
  # Problem 1
  # If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23.
  # Find the sum of all the multiples of 3 or 5 below 1000.
  a = []
  for i in range(1,1000):
      if (i % 5 == 0) or (i % 3 == 0):
          a.append(i)
  print(sum(a))
  
  
  # answer
  # 233168
  