w = 80.5

h = 1.75

BMI = w/h**2

if BMI < 18.5:

    print('过轻')

elif 18.5 <= BMI <= 25:

    print('正常')

elif 25 < BMI <= 28:

    print('过重')

elif 28 < BMI <= 32:

    print('肥胖')

else:

    print('严重肥胖')