bmi = weight/height/2
print ('您的BMI指数为：%.1f' % bmi)
if bmi>=32:
    print ('严重肥胖')
elif bmi>=28:
    print ('肥胖')
elif bmi>=25:
    print ('过重')
elif bmi>=18.5:
    print ('正常')
else:
    print ('过轻')