题解 | #牛牛的绩点#
牛牛的绩点
https://www.nowcoder.com/practice/de8bc3e736164786b07a4dd64ed172f7
dict_1 = {'A':4.0,'B':3.0,'C':2.0,'D':1.0,'F':0}
score_1 = 0
score_2 = 0
while True:
level = input()
if level != 'False':
num = int(input())
score_1 += num*dict_1[level]
score_2 += num
else:
print(f'%.2f' %(score_1/score_2))
break
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