price = float(input('How much does a chocolate bar cost? '))
hungry = input('Are you hungry (yes or no)? ')
bars = 0

if hungry == 'yes': 
    if price < 10:
        print('Buy all chocolate bars.')
        bars = 100
    if 10 <= price <= 50:
        print('Buy 10 chocolate bars.')     
        bars = 10
    if price > 50:
        print('Buy only one chocolate bar.')
        bars = 1

if hungry == 'no':
    print('Stick to the shopping list.')

if bars > 10:
    print("Cashier says: someone's hungry!")