#include <bits/stdc++.h>
using namespace std;
const double EPS = 1e-8;
const int mod = 1e9 + 7;
const int N = 1e6 + 10;
const long long INF = 1e18;
long long power(long long x, long long y) {
  long long t = 1;
  while (y > 0) {
    if (y % 2)
      y -= 1, t = t * x % mod;
    else
      y /= 2, x = x * x % mod;
  }
  return t;
}
int main() {
  int n, k;
  scanf("%d%d", &n, &k);
  n += k - n % k;
  printf("%d\n", n);
  return 0;
}
