/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		// your code goes here
		Map blah = new HashMap();
		List list = new ArrayList();
		System.out.println(System.identityHashCode(list));
		blah.put(0, list);
		List retrievedList = (List) blah.get(0);
		System.out.println(System.identityHashCode(retrievedList));
		System.out.println(Objects.equals(list, retrievedList));
		retrievedList.add("item");
		System.out.println(list.size());
	}
}

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