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.*; class main { static List wrapArrayAsImmutableList(Object array) { if (array == null) return null; if (array instanceof Object[]) return wrapObjectArrayAsImmutableList((Object[]) array); else return wrapPrimitiveArrayAsImmutableList(array); } static List wrapObjectArrayAsImmutableList(A[] array) { if (array == null) return null; int n = Array.getLength(array); return new RandomAccessAbstractList() { public int size() { return n; } public A get(int i) { return array[i]; } }; } static List wrapPrimitiveArrayAsImmutableList(Object array) { int n = Array.getLength(array); return new RandomAccessAbstractList() { public int size() { return n; } public Object get(int i) { return Array.get(array, i); } }; } abstract static class RandomAccessAbstractList extends AbstractList implements RandomAccess { } }