Mr. Prezens is a very generous man. To show his generosity for his neighbourhood, he has decided to give each of ~N~ trick-or-treaters ~M~ candy bars.
If Mr. Prezens has ~C~ candy bars, how many candy bars will he have leftover for himself after giving each trick-or-treater ~M~ candy bars?
The first line will contain an integer, ~N~ ~(0 \le N \le 100\,000)~, the number of trick-or-treaters he has.
The second line will contain an integer, ~M~ ~(0 \le M \le 100\,000)~, the number of candy bars he gives to each trick-or-treater.
The third line will contain an integer, ~C~ ~(M \le C \le 500\,000)~, the number of candy bars he has.
Note: Mr. Prezens will always have at least enough candy bars for all trick-or-treaters.
Output the number of candy bars he will have left.
10 1 15