import java.util.ArrayList; import java.util.Arrays; import java.util.Random; import java.util.regex.Pattern; public class Flags { public static void main (String [] args) { if (args.length < 1 || !Pattern.matches("^\\d+$", args[0])) { System.err.println("Usage: java Flags n"); System.exit(1); } //code start ArrayList data = new ArrayList(); data.add(new ArrayList(Arrays.asList("청기", "백기", "둘다"))); data.add(new ArrayList(Arrays.asList("올", "내"))); data.add(new ArrayList(Arrays.asList("려","려","리지마"))); Random r = new Random(); for (int i = 0; i < Integer.parseInt(args[0]); i++) { for (ArrayList d : data) { System.out.print(d.get(r.nextInt(d.size()))); } System.out.println(); } } }