from functools import reduce


while True:
    print("in order to add numbers enter 'add'")
    print("in order to subtract numbers enter 'subtract'")
    print("in order to multiply numbers enter 'multiply'")
    print("in order to devide numbers enter 'devide'")
    print("enter 'quit' in order to end calculating")
    user_input = input(": ")


    if user_input == "quit":
        break

    elif user_input == "add":
        users_numbers = []
        count_numbers = int(input("How many numbers do you want to add?: "))
        for it in range(count_numbers):
            input_number = (input("enter the number: "))
            users_numbers.append(float(input_number))
            #print(users_numbers)
        result = reduce(lambda a,b: a+b, users_numbers)
        print("Your answer is " + str(int(result)))
        break

    elif user_input == "subtract":
        users_numbers = []
        count_numbers = int(input("How many numbers do you want to subtract?: "))
        for it in range(count_numbers):
            input_number = (input("enter the number: "))
            users_numbers.append(float(input_number))
            #print(users_numbers)
        result = reduce(lambda a,b: a-b, users_numbers)
        print("Your answer is " + str(int(result)))
        break

    elif user_input == "multiply":
        users_numbers = []
        count_numbers = int(input("How many numbers do you want to multiply?: "))
        for it in range(count_numbers):
            input_number = (input("enter the number: "))
            users_numbers.append(float(input_number))
            #print(users_numbers)
        result = reduce(lambda a,b: a*b, users_numbers)
        print("Your answer is " + str(int(result)))
        break

    elif user_input == "devide":
        users_numbers = []
        count_numbers = int(input("How many numbers do you want to devide?: "))
        for it in range(count_numbers):
            input_number = (input("enter the number: "))
            users_numbers.append(float(input_number))
            #print(users_numbers)
        result = reduce(lambda a,b: a/b, users_numbers)
        print("Your answer is " + str(int(result)))
        break
    else:
        print("Oops, smth was wrong. Go straight to check this shit, maaan! ")