Task: Program Execution
Input (English): [-55, -7, 47, -29, -31, 74, 23, -55, -92, 43, -100, -98, -77]
Output (English): [-31.0, 20.0, 9.0, -30.0, 21.5, 48.5, -16.0, -73.5, -24.5, -28.5, -99.0, -87.5]