Johny Likes Numbers

Johny likes numbers n and k very much. Now Johny wants to find the smallest integer x greater than n, so it is divisible by the number k.

The only line contains two integers n and k (1 ≤ n, k ≤ 10⁹).

Print the smallest integer x > n, so it is divisible by the number k.

5 3

6

25 13

26

26 13

39