package yukicoder249;
import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc=new Scanner(System.in);
		int res=0;
		for(int i=0;i<1000;i++){
			int n=sc.nextInt();
			int k=sc.nextInt();
		}
		System.out.println(500);
		
	}
}