Main.java

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

public class Main {
 private static final boolean DEBUG = Boolean.parseBoolean(System.getProperty("DEBUG", "false"));

 private static void debug(Object... args) {
 if (DEBUG) {
 System.err.print("DEBUG: ");
 for (Object arg : args) {
 System.err.print(arg + " ");
 }
 System.err.println();
 }
 }

 public static void main(String[] args) throws IOException {
 Scanner sc = new Scanner(System.in);
 // code goes here ...

 sc.close();
 }
}