input: 
  from typing import List
  
  def calculate_sum_of_two_integers(a: int, b: int) -> int:
      """Calculate the sum of two integers.
      >>> calculate_sum_of_two_integers(2, 3)
      5
      >>> calculate_sum_of_two_integers(-1, 1)
      0
      """
  
output:     return a + b