Task: Program Execution
Input (English): [21, 18, 13, -97, 34, -78, 34, -84, 48, -33, -97, 30]
Output (English): [19.5, 15.5, -42.0, -31.5, -22.0, -22.0, -25.0, -18.0, 7.5, -65.0, -33.5]