题解 | 牛牛的绩点
牛牛的绩点
https://www.nowcoder.com/practice/de8bc3e736164786b07a4dd64ed172f7
import sys
d = {'A': 4, 'B': 3, 'C': 2, 'D': 1, 'F': 0}
s = input()
num1 = 0
num2 = 0
while s != "False":
s1 = int(input())
num1 += d[s] * s1
num2 += s1
s = input()
print("%.2f"%(num1 / num2))