#include<stdio.h>
#include <vector>
#include <list>
#include <map>
#include <set>
#include <queue>
#include <stack>
#include <algorithm>
#include <sstream>
#include <iostream>
#include <string>
#include <stdio.h>

using namespace std;

int main() {

	int N, K;

	cin >> N >> K;
	cout << 500 << endl;
	return 0;


	if ((N - 1) % (K + 1) == 0) {
		cout << 0 << endl;
	}
	else {
		cout << 1000 << endl;
	}

	return 0;
}