678_A. 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.

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
```python
a,b=map(int,input().split())
print(((a//b)+1)*b)
```