
weight = float(input('请输入你的体重(千克)'))
height = float(input('请输入你的身高(米)'))
bmi = weight / (height * height)
if bmi < 18.5:
print('体重过轻')
else:
if bmi < 23.9:
print('正常')
else:
if bmi < 27.9:
print('超重')
else:
print('肥胖')


