light.java

package sunwooks;

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

public class light {
	
	public static void main(String [] args)throws IOException{
		int size;
		int [][] area;
		int count;
		
		//read File
		Scanner inFile= new Scanner(new File("input.txt"));
		size=inFile.nextInt();
		
		
	}
}