Profit at small bazaar

You have data of $1$ item from small bazaar for next $n$ days. You are given $2$ arrays of $n$ length. - $p$ array represents price of the product for next $n$ days. - $q$ array represents quantity of the product sold on $i$th day. You have to tell maximum profit which you can make and on which day you made that much profit. If there are multiple days with maximum profit then print