Task: Program Execution
Input (English): [50, -54, 54, -58, 54, 6, 47, 43, 74, -40, -74, 69, -5, 62, -68]
Output (English): [-2.0, 0.0, -2.0, -2.0, 30.0, 26.5, 45.0, 58.5, 17.0, -57.0, -2.5, 32.0, 28.5, -3.0]