Task: Program Execution
Input (English): [31, -2, -56, -21, -22, -6, 16, 99, 80, -40, 57, -31, 13]
Output (English): [14.5, -29.0, -38.5, -21.5, -14.0, 5.0, 57.5, 89.5, 20.0, 8.5, 13.0, -9.0]