bmi = height * height / weight

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')
elif 32 < bmi:
    print('严重肥胖')
pass