#include <iostream>
#include <fstream>
#include <vector>
#include <algorithm>
#include <cmath>
#include <queue>
#include <set>
#include <cassert>
#include <cwchar>
using namespace std;

int main(int argc, char** argv){

	long long s,k;
	cin>>s>>k;

	cout<<(s%k)+1000LL<<endl;


	return 0;
}