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3510: Johny Likes Numbers

Memory Limit：256 MB Time Limit：2.000 S
Judge Style：Text Compare Creator：
Submit：0 Solved：0
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Description

time limit per test
0.5 seconds
memory limit per test
256 megabytes
input
standard input
output
standard output

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