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.

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.

Examples

Input

5 3


Output

6


Input

25 13


Output

26


Input

26 13


Output

39
import java.util.*;

public class helloWorld 
{
	public static void main(String[] args) 
	{		
		Scanner in = new Scanner(System.in);
		int n = in.nextInt();
		int m = in.nextInt();
		int ans = 0;
		
		ans = m * (int) Math.ceil( 1.0 * (n+1) / m);
		
		System.out.println(ans);

		in.close();
	}
}