Score : $100$ points

问题描述

打印一个在 $A$ 和 $B$（包含）之间且能被 $C$ 整除的数。

如果没有这样的数字，则输出 -1。

以上为通义千问 qwen-max 翻译，仅供参考。

Problem Statement

Print a number between $A$ and $B$ (inclusive) that is a multiple of $C$.

If there is no such number, print -1.

Constraints

• $1 \leq A \leq B \leq 1000$
• $1 \leq C \leq 1000$
• All values in input are integers.

Input

Input is given from Standard Input in the following format:

$A$ $B$ $C$

Output

Print the answer.
If there is no number with the desired property, print -1.

Sample Input 1

123 456 100

Sample Output 1

200

300 or 400 would also be accepted.

Sample Input 2

630 940 314

Sample Output 2

-1

update @ 2024/3/10 09:42:59