day1

product_list = [
    (,),
    (,),
    (,)
]
shopping_list =[]
salary = ()

salary.isdigit():
    salary = (salary)
    :
        index,item (product_list):
            (index,item)
        user_choice = ()
        user_choice.isdigit():
            user_choice = (user_choice)
            user_choice < (product_list) user_choice >=:
                p_item = product_list[user_choice]
                p_item[] <= salary:
                    shopping_list.append(p_item)
                    salary -= p_item[]
                    (% p_item,salary)
                :
                    ()
            :
                ()
        user_choice == :
            ()
        :
            ()