题解 | 牛牛的绩点
牛牛的绩点
https://www.nowcoder.com/practice/de8bc3e736164786b07a4dd64ed172f7
level_score = {"A":4.0,"B":3.0,"C":2.0,"D":1.0,"F":0}
total_score = 0
score_sum = 0
while True:
level = input()
if level == "False":
break;
else:
score = int(input())
total_score += level_score[level]*score
score_sum += score
print("%.2f" % (total_score / score_sum))
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