a = float(input("Nhap can nang cua ban: "))
b = float(input("Nhap chieu cao cua ban: "))
c = a/(b*b)
print("Chi so BMI cua ban la: ",c,end=", phan loai: ")
if c<18.5:
       print("Gay")
elif c>=18.5 and c<=24.9:
       print("Binh thuong")
elif c>=25 and c<=29.9:
       print("Hoi beo")
elif c>=30 and c<=34.9:
       print("Beo phi cap do 1")
elif c>=35 and c<=39.9:
       print("Beo phi cap do 2")
elif c>40:
       print("Beo phi cap do 3")

#samon247

print(end = 'Nhap can nang cua ban: ')
        W = float(input())
print(end = 'Nhap chieu cao cua ban: ')
        H = float(input())

        BMI = W/(H*H)
print('Chi so BMI cua ban la: '+ str(round(BMI,2)))

if BMI<16:
      print('Gay do III')
elif (16<=BMI) and (BMI<17):
      print('Gay do II')
elif (17<=BMI) and (BMI<18.5):
      print('Gay do I')
elif (18.5<=BMI) and (BMI<25):
      print('Binh thuong')
elif (25<=BMI) and (BMI<30):
      print('Thua can')
elif (30<=BMI) and (BMI<35):
      print('Beo phi do I')
elif (35<=BMI) and (BMI<40):
      print('Beo phi do II')
elif BMI>40:
      print('Beo phi do III')

Học tốt!