题解 | #牛牛的绩点#
牛牛的绩点
https://www.nowcoder.com/practice/de8bc3e736164786b07a4dd64ed172f7
dic1 = {"A": 4.0, "B": 3.0, "C": 2.0, "D": 1.0, "F": 0}
list1 = []
list2 = []
while True:
grade = input()
if grade == "False":
break
else:
score = eval(input())
list1.append(dic1[grade] * score)
list2.append(score)
print(f"{sum(list1) / sum(list2):.2f}")
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