package m.shin;
import java.util.Scanner;
public class Con249 {

	public static void main(String[] args) {
		Scanner s = new Scanner(System.in);
		int[] n = new int[1000] , k = new int[1000];
		for(int i = 0;i < 1000;i++){
			n[i] = s.nextInt();
			k[i] = s.nextInt();
		}
		s.close();

		System.out.println("500");

	}

}