#D9489. Buying Sweets
Buying Sweets
Buying Sweets
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.
Examples
Input
1234 150 100
Output
84
Input
1000 108 108
Output
28
Input
579 123 456
Output
0
Input
7477 549 593
Output
405
inputFormat
Input
Input is given from Standard Input in the following format:
X A B
outputFormat
Output
Print the amount you have left after shopping.
Examples
Input
1234 150 100
Output
84
Input
1000 108 108
Output
28
Input
579 123 456
Output
0
Input
7477 549 593
Output
405
样例
1000
108
10828