# a) Add parentheses to the following expression so that it evaluates to 1.
print((5 - 3) // 2)        # 加入小括號讓運算為 1

# b) Add parentheses to the following expression so that it evaluates to 0.
print(8 - 3 * 2 - (1 + 1)) # 加入小括號讓運算為 0