x = int(input())
m = 0
if x<=150:
    m = x*0.4463
elif 150<x<=400:
    m = 150*0.4463+0.4663*(x-150)
elif 400<x:
    m = 150*0.4463+250+0.4663+(x-400)*0.5663
print(round(m,1))

有谁可以告诉我python3出现了什么问题吗