There's a **"3 for 2"** (or **"2+1"** if you like) offer on mangoes. For a given quantity and price (per mango), calculate the total cost of the mangoes.

### Examples
```python
mango(3, 3) ==> 6    # 2 mangoes for 3 = 6; +1 mango for free
mango(9, 5) ==> 30   # 6 mangoes for 5 = 30; +3 mangoes for free
```

Difficulty: EASY
Starter code: def mango(quantity, price):
	

Solutions:
def mango(quantity, price):
	return (quantity - quantity // 3) * price


def mango(quantity, price):
	batch = quantity // 3
	total = (batch * 2 + quantity % 3) * price
	return total


def mango(quantity, price):
	(a, b) = divmod(quantity, 3)
	return price * (a * 2 + b)


mango = lambda q, p: p * (q - q // 3)


mango = lambda count, price: (count - count // 3) * price


from math import ceil
mango = lambda q, p: ceil(q / 3 * 2) * p


mango = lambda q, p: (q // 3 * 2 + q % 3) * p


def mango(quantity, price):
	free = 0
	for i in range(1, quantity + 1):
		if i % 3 == 0:
			free += 1
	return price * (quantity - free)


def mango(quantity, price):
	(q, r) = divmod(quantity, 3)
	return price * (2 * q + r)


def mango(quantity, price):
	groups_of_three = quantity // 3
	remainding = quantity % 3
	return groups_of_three * 2 * price + remainding * price


def mango(quantity, price):
	if quantity % 3 == 0:
		return quantity * 2 * price // 3
	else:
		return quantity // 3 * 2 * price + quantity % 3 * price


def mango(quantity, price):
	if quantity == 2 or quantity == 3:
		return 2 * quantity
	else:
		free = quantity // 3
		return (quantity - free) * price


import numpy as np

def mango(quantity, price):
	return (quantity - np.floor(quantity / 3)) * price


def mango(quant, price):
	return (quant - quant // 3) * price


def mango(q, p):
	return sum(map(lambda x, y: x * y, [q // 3, q % 3], [2 * p, p]))


def mango(quantity, price):
	remaining = quantity % 3
	quantity = (quantity - remaining) * 2 / 3
	return quantity * price + remaining * price


def mango(quantity, price):
	non_discounted_mangos = quantity % 3
	discounted_mangos = quantity - non_discounted_mangos
	return discounted_mangos / 3 * 2 * price + non_discounted_mangos * price


def mango(quantity, price):
	(s, e) = divmod(quantity, 3)
	return price * (2 * s + e)


def mango(quantity, price):
	special_price_lots = quantity // 3
	full_price_mangoes = quantity - special_price_lots * 3
	return (special_price_lots * 2 + full_price_mangoes) * price


def mango(quantity, price):
	if quantity / 3 == 1:
		return (quantity - 1) * price
	else:
		actual_quantity = quantity // 3
		return (quantity - actual_quantity) * price


def mango(q, price):
	return price * (q - q // 3)


import math

def mango(quantity, price):
	n = math.ceil(quantity * (2 / 3))
	return price * n


def mango(quantity, price):
	a = int(quantity / 3)
	quantity -= a
	return price * quantity


def mango(quantity, price):
	free = quantity // 3
	res = (quantity - free) * price
	return res


from math import ceil

def mango(quantity, price):
	x = quantity // 3
	return (quantity - x) * price


def mango(q, p):
	return (2 * (q // 3) + q % 3) * p


import math

def mango(quantity, price):
	actual = math.floor(quantity / 3)
	return (quantity - actual) * price


def mango(quantity, price):
	return (quantity - quantity // 3) * price if quantity > 3 else 6


def mango(quantity, price):
	grupos = quantity // 3
	residuo = quantity % 3
	precio = grupos * 2 * price
	if residuo == 0:
		return precio
	elif residuo == 1:
		return precio + price
	elif residuo == 2:
		return precio + price * 2


def mango(quantity, price):
	return price * round(quantity * 2 / 3 + 0.5)


import math

def mango(quantity, price):
	free_mangos = math.floor(quantity / 3)
	return (quantity - free_mangos) * price


def mango(quantity, price):
	pass
	c = (quantity - quantity // 3) * price
	return c


import math

def mango(quantity, price):
	return (quantity // 3 + (quantity - quantity // 3 * 2)) * price


def mango(quantity, price):
	q = quantity
	p = price
	return (q - q // 3) * p


mango = lambda quantity, price: (quantity - quantity // 3) * price


def mango(quantity, price):
	print(quantity, price)
	if not quantity % 3 == 2:
		return price * (quantity * 2 // 3) + price * (quantity % 3)
	else:
		return price * (quantity * 2 // 3) + price * (quantity % 3) / 2


def mango(quantity, price):
	if quantity % 3 == 0:
		return quantity * 2 / 3 * price
	elif quantity % 3 == 1:
		return (quantity - 1) * 2 / 3 * price + price
	elif quantity % 3 == 2:
		return (quantity - 2) * 2 / 3 * price + 2 * price


def mango(quantity, price):
	buy = 0
	bill = 0
	while buy < quantity:
		buy += 3
		bill += price * 2
	if buy == quantity:
		return bill
	elif buy - quantity == 1:
		return bill
	elif buy - quantity == 2:
		return bill - price


def mango(quantity, price):
	n = 0
	all_price = 0
	if quantity <= 2:
		return quantity * price
	elif quantity > 2:
		while n < quantity:
			n += 1
			all_price += price
			if n % 3 == 0:
				all_price -= price
	return all_price
	pass


def mango(quantity, price):
	deal = int(quantity / 3)
	no_deal = quantity - deal * 3
	return deal * 2 * price + no_deal * price


def mango(quantity, price):
	if quantity % 3 == 0:
		a = quantity / 3 * 2
		return a * price
	elif quantity % 3 != 0:
		b = quantity % 3
		c = (quantity - b) / 3 * 2
		d = c + b
		return d * price


def mango(quantity, price):
	total = 0
	for each in range(1, quantity + 1):
		if each % 3 != 0:
			total += price
	return total


def mango(quantity, price):
	pass
	x = quantity // 3
	y = quantity % 3
	return (2 * x + y) * price


from math import floor

def mango(q, p):
	return (q - floor(q / 3)) * p


def mango(q, p):
	price = 0
	while q % 3 != 0:
		price += p
		q -= 1
	return price + q * (2 / 3) * p


def mango(quantity, price):
	return (int(quantity * 2 / 3) + (1 if quantity % 3 else 0)) * price


import math

def mango(quantity, price):
	print(quantity, price)
	return math.ceil(quantity / 3 * 2) * price


def mango(q, p):
	print((q, p))
	return q * p - q // 3 * p


def mango(quantity, price):
	groups_three = quantity // 3
	extra = quantity % 3
	cost = 0
	cost = cost + groups_three * (price * 2)
	cost = cost + extra * price
	return cost


def mango(quantity, price):
	groupsOfThree = quantity // 3
	remainder = quantity - groupsOfThree * 3
	return groupsOfThree * price * 2 + remainder * price


from math import ceil

def mango(quantity, price):
	return ceil(quantity / 3 * 2) * price


def mango(q, p):
	Q = q / 3 * 2
	Q = int(Q) if Q % 1 == 0 else int(Q) + 1
	return Q * p


def mango(quantity, price):
	total = 0
	for i in range(1, quantity + 1):
		if i % 3 != 0:
			total += price
		else:
			pass
	return total


def mango(quantity, price):
	q = quantity // 3 * 2
	q += quantity - q * 1.5
	return q * price


def mango(quantity, price):
	return round(quantity // 3 * 2 * price + quantity % 3 * price)


def mango(quantity, price):
	return quantity % 3 * price + int(quantity - quantity % 3) / 3 * 2 * price


def mango(q, pr):
	return q // 3 * 2 * pr + (q - q // 3 * 3) * pr


from operator import mod

def mango(quantity, price):
	x = int(quantity / 3) * 2
	r = mod(quantity, 3)
	return x * price + r * price


def mango(quantity, price):
	total = 0
	for count in range(1, quantity + 1):
		if count % 3 == 0:
			continue
		total += price
	return total


def mango(quantity, price):
	p2 = price * 2
	calc = divmod(quantity, 3)
	calc2 = calc[0] * p2
	return calc2 + calc[1] * price


def mango(quantity, price):
	ost = quantity % 3
	return ((quantity - ost) * 2 / 3 + ost) * price


def mango(q, p):
	return q // 3 * 2 * p if q % 3 == 0 else q // 3 * 2 * p + q % 3 * p


import math

def mango(quantity, price):
	a = math.floor(quantity / 3)
	return math.floor((quantity - a) * price)


def mango(a, b):
	return a // 3 * 2 * b + a % 3 * b


from math import floor

def mango(quantity, price):
	return (quantity - floor(quantity / 3)) * price


def mango(quantity, price):
	paid_mangos = (quantity - quantity % 3) // 3 * 2 + quantity % 3
	return paid_mangos * price


def mango(total_quantity, price_per_mango):
	quantity_of_set_3 = int(total_quantity / 3)
	remaining_mangoes = total_quantity % 3
	price_per_two_mangoes = price_per_mango * 2
	cost_of_set3 = quantity_of_set_3 * price_per_two_mangoes
	cost_remaining_mangoes = remaining_mangoes * price_per_mango
	total_cost = cost_of_set3 + cost_remaining_mangoes
	return total_cost


def mango(quantity, price):
	sum = 0
	while quantity > 2:
		quantity = quantity - 3
		sum = sum + price * 2
	return sum + price * quantity


def mango(quantity, price):
	result = divmod(quantity, 3)
	return result[0] * 2 * price + result[1] * price


def mango(quantity, price):
	a = quantity % 3
	b = quantity - a
	c = 2 * b / 3
	d = c * price + a * price
	return d


def mango(quantity, price):
	print('==>> ', quantity, price)
	num_3 = int(quantity / 3)
	print('Num_3: ', num_3)
	output = (quantity - num_3) * price
	return output