Educational Codeforces Round 13 A

[b]Description[/b]

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
嗯，这个就没必要说了吧，找n与k的关系

#include<iostream>
#include<stdio.h>
#include<algorithm>
#include<string.h>
using namespace std;
int a,b,c;
long long n,t;
int main()
{
long long k;
long long sum;
cin>>n>>k;
cout<<(n/k+1)*k<<endl;
return 0;
}