input: 
  def to_int_list(s: str) -> List[int]:
      """ Convert a given string to a list of integers. Each integer in the string is separated by a comma.
      >>> to_int_list("1,2,3,4,5")
      [1, 2, 3, 4, 5]
      >>> to_int_list("100,-200,300")
      [100, -200, 300]
      """
  
output:     return [int(num) for num in s.split(',')]