作业

a = float(input("请输入身高："))
b = float(input("请输入体重："))
s = b/(a*a)
if s <18.5:
    print("过轻")
elif 18.5<= s <25:
    print("正常")
elif 25<= s <28:
    print("过重")
elif 28<= s <32:
    print("肥胖")
else :
    print("严重肥胖")