import javax.swing.*;
import java.awt.*;

public class Damier {
	public static void main(String[] args) {
	 
	int taille = Integer.parseInt(args[0]);
	JFrame fenetre = new JFrame();
    fenetre.setSize(500, 500);
    fenetre.setLocation(0, 0);
	GridLayout main = new GridLayout(taille,taille);
	fenetre.setLayout(main);

    for (int i = 0;i<taille;i++) 
    {
    	for (int j = 0;j<taille;j++) 
    	{
	    	JPanel temp = new JPanel();
	    	if ((i+j)%2==0) 
	    	{
	    		temp.setBackground(Color.CYAN);
	    	}	
	    	else
	    	{
	    		temp.setBackground(Color.WHITE);
	       	}
	    	fenetre.add(temp);
	    }
    }

    fenetre.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    fenetre.setVisible(true);	
	}
}