459:/lib/trade.c (/lib/trade.c)
(int) can_pay_arr(int price, int *arr)
/*
 * Function name: can_pay_arr
 * Description:   check if the array is enough to pay the price
 * Arguments:     price - the price to pay
 *                arr - the array holding the coins
 * Returns:       1 - can pay, 0 - can't
 */
