text: a = float(input())
  if a > 5 and a < 15:
      a *= 10
      print(a)
  
  a = float(input())
  b = float(input())
  c = float(input())
  if a > b and a > c:
      print(a)
  
  a = float(input())
  if 5 < a < 15:
      a *= 10
      print(a)