height = 1.75
weight = 80.5

bmi = weight /height ** 2
if bmi < 18.5:
    print('过轻')
elif bmi <=25:
    print("正常")
elif bmi <=28:
    print("过重")
elif bmi <=32:
    print("肥胖")
else:
    print("严重肥胖")