题解 | #牛牛的绩点#
牛牛的绩点
https://www.nowcoder.com/practice/de8bc3e736164786b07a4dd64ed172f7
grade = {"A": 4.0, "B": 3.0, "C": 2.0, "D": 1.0, "F": 0.0}
# list
list1 = []
list2 = []
while True:
S = input()
if S == "False":
break
else:
score = int(input())
weight = grade.get(S)
list1.append(weight * score)
list2.append(score)
print("{:.2f}".format(sum(list1) / sum(list2)))
#阅读理解了属实是#
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