height=int(input())

weight=int(input())

bmi = weight/height*2

print('小明的BMI指数为:%.2f'%bmi)

if bmi <18.5:

    print('过轻')

elif 18.5<= bmi<25:

    print('正常')

elif 25<=bmi<28:

    print('过重')

elif 28<=bmi<32:

    print('肥胖')

else:

    print('严重肥胖')