height = 1.75
weight = 80.5
bmi = weight/height**2
print(f'{bmi}')
if bmi <= 18.5:    print('过轻')
elif 8.5 <= bmi <= 25:    print('正常')
elif 25 <= bmi <= 28:    print('过重')
elif 28 <= bmi <= 32:    print('肥胖')
elif bmi>= 32:    print('严重肥胖')