mhmdf

import java.io.*;
import java.util.*;

        class Multichannel
{@SuppressWarnings("empty-statement")
    public static void main(String a[])throws IOException
{BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
Random r=new Random(0);
int i,j;
int arrivaltime[]={1,2,3,4};