Johny Likes Numbers

Description:

Input:

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

Output:

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

Sample Input:

5 3

Sample Output:

6

Sample Input:

25 13

Sample Output:

26

Sample Input:

26 13

Sample Output:

39