题解 | #牛牛的绩点#
牛牛的绩点
https://www.nowcoder.com/practice/de8bc3e736164786b07a4dd64ed172f7
dict1 = {'A':4.0,'B':3.0,'C':2.0,'D':1.0,'F':0}
list1 = []
list2 = []
while True:
first_ele = input('')
if first_ele == 'False':
break
else:
second_ele = int(input())
list1.append(dict1[first_ele]*second_ele)
list2.append(second_ele)
print('%.2f'%(sum(list1)/sum(list2)))
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