Contest: Task: Related: TaskB

Score : $100$ points

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

If there is no such number, print `-1`

.

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

Input is given from Standard Input in the following format:

$A$ $B$ $C$

Print the answer.

If there is no number with the desired property, print `-1`

.

123 456 100

200

`300`

or `400`

would also be accepted.

630 940 314

-1