Task: Program Execution
Input (English): [-100, -100, -39, 13, 24, -2, 77, 37, -20, -38, 18, 55]
Output (English): [-100.0, -69.5, -13.0, 18.5, 11.0, 37.5, 57.0, 8.5, -29.0, -10.0, 36.5]