Task: Program Execution
Input (English): [-13, 16, -24, -7, 99, 19, 1, 46, -1, 74, -34, -1]
Output (English): [1.5, -4.0, -15.5, 46.0, 59.0, 10.0, 23.5, 22.5, 36.5, 20.0, -17.5]