height=1.75
weight=75
username="小明"
bmi=weight/height**2
print(f'{username}您好,您的体质指数为{round(bmi,1)}')
if bmi<=18.5:
    print(f'{username}您好,您的体质指数偏瘦')
elif bmi<=24.9:
    print(f'{username}您好,您的体质指数正常')
elif bmi<=29.9:
    print(f'{username}您好,您的体质指数超重')
else:
    print(f'{username}您好,您的体质指数肥胖')