input: 
  def to_int_list(s: str) -> List[int]:
      """
      Convert a given string to a list of integers. The string is assumed to be comma-separated.
      
      >>> to_int_list('1,2,3,4,5')
      [1, 2, 3, 4, 5]
      >>> to_int_list('10,20,30')
      [10, 20, 30]
      """
      return [int(x) for x in s.split(',')]
  
output:     return [int(x) for x in s.split(',')]