catalyst0

import java.io.*;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;
import java.util.Scanner;
import java.util.function.Function;

public class Main {

catalyst0

import java.util.Arrays;

public class ConnectJoinAlgorithm {

    static int[] id;
    static int[] integers;

    static int N = 10;

    public static void main(String[] args) {

catalyst0

##FILE SPACING:

 # double space a file
 sed G

 # double space a file which already has blank lines in it. Output file
 # should contain no more than one blank line between lines of text.
 sed '/^$/d;G'

 # triple space a file