text: def solution(n):
      """Returns the sum of all the multiples of 3 or 5 below n.
  
      >>> solution(3)
      0
      >>> solution(4)
      3
      >>> solution(10)
      23
      >>> solution(600)
      83700
      """
  
      xmulti = []
      zmulti = []
      z = 3
      x = 5
      temp = 1
      while True:
          result = z * temp
          if result < n:
              zmulti.append(result)
              temp += 1
          else:
              temp = 1
              break
      while True:
          result = x * temp
          if result < n:
              xmulti.append(result)
              temp += 1
          else:
              break
      collection = list(set(xmulti + zmulti))
      return sum(collection)
  
  
  if __name__ == "__main__":
      print(solution(int(input().strip())))
  