print("请输入三种笔记本的优惠金额数（元）：")
a,b,c = input().split()
a = float(a)
b = float(b)
c = float(c)
if a > b:
m = a
else:
m = b
if c > m:
m = c
print("优惠金额数最大的为：", m, "元")
