import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		for(int i = 0; i < 1000; i++) {
			int N = scan.nextInt();
			int K = scan.nextInt();
		}
		scan.close();
		System.out.println(500);

	}
}