100870: [AtCoder]ABC087 A - Buying Sweets
Memory Limit:256 MB
Time Limit:2 S
Judge Style:Text Compare
Creator:
Submit:0
Solved:0
Description
Score : $100$ points
Problem Statement
You went shopping to buy cakes and donuts with $X$ yen (the currency of Japan).
First, you bought one cake for $A$ yen at a cake shop. Then, you bought as many donuts as possible for $B$ yen each, at a donut shop.
How much do you have left after shopping?
Constraints
- $1 \leq A, B \leq 1$ $000$
- $A + B \leq X \leq 10$ $000$
- $X$, $A$ and $B$ are integers.
Input
Input is given from Standard Input in the following format:
$X$ $A$ $B$
Output
Print the amount you have left after shopping.
Sample Input 1
1234 150 100
Sample Output 1
84
You have $1234 - 150 = 1084$ yen left after buying a cake. With this amount, you can buy $10$ donuts, after which you have $84$ yen left.
Sample Input 2
1000 108 108
Sample Output 2
28
Sample Input 3
579 123 456
Sample Output 3
0
Sample Input 4
7477 549 593
Sample Output 4
405