input: 
  Write a function to calculate the sum of any number of integer arguments provided. The function should return the sum of all the integer inputs. If no arguments are provided, it should return 0.
  assert sum_ints(3, 5, 7)==15
  assert sum_ints(0, -1, 1)==0
  assert sum_ints(10)==10
  assert sum_ints() == 0
  assert sum_ints(-5, -3, -1) == -9
  
output:     
  def sum_ints(*args: int) -> int:
      return sum(args)
  