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

public class Test {
 public static void main(String[] args) {
 // Test :
 // (true and x) and (y and (not x))
 Context context = new Context();
 
 VariableExp x = new VariableExp("X");
 VariableExp y = new VariableExp("Y");
 VariableExp bTure = new VariableExp("true");
 VariableExp bFalse = new VariableExp("false");

 context.Assign("true", true);
 context.Assign("false", false);
 context.Assign("X", false);
 context.Assign("Y", true);
 
 BooleanExp expression = new AndExp(
 new AndExp(bTure, x),
 new AndExp(y, new NotExp(x))
 );
 boolean result = expression.Evaluate(context);
 System.out.println("The result is:" + result);
 }
}