题解 | #牛牛的绩点#
牛牛的绩点
https://www.nowcoder.com/practice/de8bc3e736164786b07a4dd64ed172f7
# 是把学分乘以绩点的和再除以总学分
list1 = []
k = 0
dict1 = {"A":4.0, "B":3.0, "C":2.0, "D":1.0, "F":0}
while 1:
i = input()
if i == 'False':
break
j = int(input())
k += j
list1.append(dict1[i]*j)
print(f'{sum(list1)/k:.2f}')
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