Task: Program Execution
Input (English): [-50, -57, 27, 20, 0, -86, -28, 59, 36, -91, -51, 24, 65]
Output (English): [-53.5, -15.0, 23.5, 10.0, -43.0, -57.0, 15.5, 47.5, -27.5, -71.0, -13.5, 44.5]