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.*; // not a very good one class main { static boolean instanceOf(Object o, String className) { if (o == null) return false; String c = o.getClass().getName(); return eq(c, className) || eq(c, "main$" + className); } // better static boolean instanceOf(Object o, Class c) { if (c == null) return false; return c.isInstance(o); } static boolean instanceOf(Class c, Object o) { return instanceOf(o, c); } static boolean eq(Object a, Object b) { return a == b || (a == null ? b == null : b != null && a.equals(b)); } static String str(Object o) { return o == null ? "null" : o.toString(); } static String str(char[] c) { return new String(c); } }