题解 | #牛牛的绩点#
牛牛的绩点
https://www.nowcoder.com/practice/de8bc3e736164786b07a4dd64ed172f7
import sys
a={
'A':4.0,
'B':3.0,
'C':2.0,
'D':1.0,
'F':0
}
c=[]
while True:
b=input()
c.append(b)
if b == 'False':
break
sum=0
d=0
for i in range(0,len(c)-1,2):
sum = sum + (a.get(c[i]) * float(c[i+1]))
d = d + int(c[i+1])
print("%.2f" %(sum/d))
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