import java.awt.*;
import java.awt.geom.*;
import java.io.*;
import java.util.*;
class Main {
 
 
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        for(int i = 0; i < 1000; i++) {
        	int n = sc.nextInt();
        	int k = sc.nextInt();
        }
        System.out.println(500);
    }
    
    
    
 
 
}