/* 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
	{
		int num[] = {1,1,2,3,2,4,4,5,5};
		int n = 0;
		long startTime = System.nanoTime();
		for (int i =0;i<num.length;i++) {
			n = n^num[i];
		}
		long endTime   = System.nanoTime();
		long totalTime = endTime - startTime;
		System.out.println(n);
		System.out.print(totalTime);
	}
}

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