input: def calculate_objective_function(a: int, b: int, c: int, x: float, y: float) -> float:
      """ Calculates the objective function of a linear equation ax + by = c.
      >>> calculate_objective_function(3, 5, 7, 1.0, 1.0)
      1.0
      >>> calculate_objective_function(3, 5, 7, 2.0, 3.0)
      4.0
      """
output:     return abs(a * x + b * y - c)