题解 | 牛牛的绩点
牛牛的绩点
https://www.nowcoder.com/practice/de8bc3e736164786b07a4dd64ed172f7
score_dict = {"A":4.0, "B":3.0, "C":2.0, "D":1.0, "F":0}
score = 0
score_lst = []
mark_lst = []
while True:
level = input()
if level == 'False':
break
elif level:
mark = int(input())
score_lst.append(score_dict[level] * mark)
mark_lst.append(mark)
print("%.2f" % (sum(score_lst)/sum(mark_lst)))
