def calculate_freight(weight, distance):
    base_rate = 0.5
    return base_rate * weight + base_rate * distance

weight = float(input("請輸入快遞重量（千克）："))
distance = float(input("請輸入距離（千米）："))

freight = calculate_freight(weight, distance)
print("快遞運費為：", freight, "元")