Task: Program Execution
Input (English): [-3, 0, -88, -73, 15, -68, 24, -99, 72, -62, 21, -17, -20]
Output (English): [-1.5, -44.0, -80.5, -29.0, -26.5, -22.0, -37.5, -13.5, 5.0, -20.5, 2.0, -18.5]