bmi = weight/(height**2)

print(f'bmi指数为:{bmi:.2f}')

if bmi > 18.5:

        print('过轻')

elif bmi >= 18.5 and bmi < 25:

        print('正常')

elif bmi >= 25 and bmi < 28:

        print('过重')

elif bmi >= 28 and bmi < 32:

        print('肥胖')

else:

        print('严重肥胖')