题解 | #牛牛的绩点#
牛牛的绩点
https://www.nowcoder.com/practice/de8bc3e736164786b07a4dd64ed172f7
total = 0
a = 0
while True:
l = input()
if l == 'False':
break
g = int(input())
if l == "A":
grade = g * 4
elif l == "B":
grade = g * 3
elif l == "C":
grade = g * 2
elif l == "D":
grade = g * 1
elif l == "F":
grade = g * 0
total += grade
a += g
print('{:.2f}'.format(total / a))
a = 0
while True:
l = input()
if l == 'False':
break
g = int(input())
if l == "A":
grade = g * 4
elif l == "B":
grade = g * 3
elif l == "C":
grade = g * 2
elif l == "D":
grade = g * 1
elif l == "F":
grade = g * 0
total += grade
a += g
print('{:.2f}'.format(total / a))
