import java.util.*;
import java.util.zip.*;
import java.util.List;
import java.util.regex.*;
import java.util.concurrent.*;
import java.util.concurrent.atomic.*;
import java.util.concurrent.locks.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.text.*;
import javax.swing.table.*;
import java.io.*;
import java.net.*;
import java.lang.reflect.*;
import java.lang.ref.*;
import java.lang.management.*;
import java.security.*;
import java.security.spec.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import javax.imageio.*;
import java.math.*;


import org.knowm.xchart.*;
class main {
 // XChart



public static void main(final String[] args) throws Exception {
  double[] xData = new double[] { 0.0, 1.0, 2.0 };
  double[] yData = new double[] { 2.0, 1.0, 0.0 };

  XYChart chart = QuickChart.getChart("Sample Chart", "X", "Y", "y(x)", xData, yData);

  new SwingWrapper(chart).displayChart();
}}