Catherine received an array of integers as a gift for March 8. Eventually she grew bored with it, and she started calculated various useless characteristics for it. She succeeded to do it for each one she came up with. But when she came up with another one — xor of all pairwise sums of elements in the array, she realized that she couldn't compute it for a very large array, thus she asked for your help. Can you do it? Formally, you need to compute

$$$ (a_1 + a_2) ⊕ (a_1 + a_3) ⊕ … ⊕ (a_1 + a_n) \\\ ⊕ (a_2 + a_3) ⊕ … ⊕ (a_2 + a_n) \\\ … \\\ ⊕ (a_{n-1} + a_n) \\\ $$$

Here x ⊕ y is a bitwise XOR operation (i.e. x ^ y in many modern programming languages). You can read about it in Wikipedia: <https://en.wikipedia.org/wiki/Exclusive_or#Bitwise_operation>.

Input

The first line contains a single integer n (2 ≤ n ≤ 400 000) — the number of integers in the array.

The second line contains integers a_1, a_2, …, a_n (1 ≤ a_i ≤ 10^7).

Output

Print a single integer — xor of all pairwise sums of integers in the given array.

Examples

Input


2
1 2


Output


3

Input


3
1 2 3


Output


2

Note

In the first sample case there is only one sum 1 + 2 = 3.

In the second sample case there are three sums: 1 + 2 = 3, 1 + 3 = 4, 2 + 3 = 5. In binary they are represented as 011_2 ⊕ 100_2 ⊕ 101_2 = 010_2, thus the answer is 2.

⊕ is the bitwise xor operation. To define x ⊕ y, consider binary representations of integers x and y. We put the i-th bit of the result to be 1 when exactly one of the i-th bits of x and y is 1. Otherwise, the i-th bit of the result is put to be 0. For example, 0101_2   ⊕   0011_2 = 0110_2.
import java.util.*;
import java.io.*;
import java.math.*;

public class Main {

	//static int p = 1000000007;
	static int p = 998244353;
	
	

	public static void main(String args[]) throws IOException {
		Scanner sc = new Scanner();
		PrintWriter out = new PrintWriter(System.out);
		//Mod mod = new Mod();
		//mod.precalc();

		int t = 1;
		//t = sc.nextInt();

		
		while (t-- > 0) {
			
			int n = sc.nextInt(), arr[]=new int[n];
			for(int i=0; i<n; i++)
				arr[i]=sc.nextInt();
			
			int ans=0;
			
			for(int i=0; i<25; i++) {
				
				int arr1[] = new int[n];
				for(int j=0; j<n; j++)
					arr1[j] = arr[j]%(1<<i+1);
				Arrays.parallelSort(arr1);
				int cnt =0;
				int l1=-1, l2=-1, l3=-1;
				for(int j=0; j<n; j++) {
					
					if(l1==-1 && arr1[j]+arr1[n-1]>=(1<<i))
						l1=n-1;
					if(l2==-1 && arr1[j]+arr1[n-1]>=(1<<i+1))
						l2=n-1;
					if(l3==-1 && arr1[j]+arr1[n-1]>=(1<<i)+(1<<i+1))
						l3=n-1;
					
					while(l1!=-1 && l1>j && arr1[j]+arr1[l1-1]>=(1<<i))
						l1--;
					while(l2!=-1 && l2>j && arr1[j]+arr1[l2-1]>=(1<<i+1))
						l2--;
					while(l3!=-1 && l3>j && arr1[j]+arr1[l3-1]>=(1<<i)+(1<<i+1))
						l3--;
					
					if(l1!=-1) {
						if(l2==-1)
							cnt+=n-max(j+1,l1);
						else {
							if(l2>j)
								cnt+=l2-max(j+1,l1);
							if(l3!=-1)
								cnt+=n-max(j+1,l3);
						}
					}
					
					//if(i<3)
						//out.println(j+" "+cnt+" "+l1+" "+l2+" "+l3);
					
				}
				ans += (cnt%2)<<i;
			}
			
			out.print(ans);
		}
		out.flush();
	}
	
	
	
    
	static int count(int x, int[] arr) {
		int count = 0;

		for (int i = 0; i < arr.length; i++)
			if (arr[i] == x)
				count++;
		return count;
	}

	public static String reverseString(String str) {
		StringBuilder sb = new StringBuilder(str);
		sb.reverse();
		return sb.toString();
	}

	static boolean isPalindrome(String str) {
		int i = 0, j = str.length() - 1;

		while (i < j) {

			if (str.charAt(i) != str.charAt(j))
				return false;

			i++;
			j--;
		}
		return true;
	}

	static void print(int[] arr) {
		for (int i = 0; i < arr.length; i++)
			System.out.print(arr[i] + " ");
		System.out.println();
	}

	public static int abs(int x) {
		return ((x > 0) ? x : -x);
	}

	public static long abs(long x) {
		return ((x > 0) ? x : -x);
	}

	public static int max(int a, int b) {
		return Math.max(a, b);
	}

	public static long max(long a, long b) {
		return Math.max(a, b);
	}

	public static int min(int a, int b) {
		return Math.min(a, b);
	}

	public static long min(long a, long b) {
		return Math.min(a, b);
	}

	static int gcd(int a, int b) {
		if (a == 0)
			return b;
		return gcd(b % a, a);
	}

	static int modInverse(int a, int m) {
		int g = gcd(a, m);
		if (g != 1)
			return -1;
		else
			return power(a, m - 2, m);

	}

	// To compute x^y under modulo m
	static int power(int x, int y, int m) {
		if (y == 0)
			return 1;

		int p = power(x, y / 2, m) % m;
		p = (p * p) % m;

		if (y % 2 == 0)
			return p;
		else
			return (x * p) % m;
	}

	static int[] primeGenerator(int num) {
		int length = 0, arr[] = new int[num], a = num, factor = 1;
		if (num % 2 == 0) {
			while (num % 2 == 0) {
				num /= 2;
				factor *= 2;
			}
			arr[length++] = factor;
		}
		for (int i = 3; i * i <= a; i++) {
			factor = 1;
			if (num % i == 0) {
				while (num % i == 0) {
					num /= i;
					factor *= i;
				}
				arr[length++] = factor;
			}
		}
		if (num > 1)
			arr[length++] = num;
		return Arrays.copyOfRange(arr, 0, length);
	}

	static boolean isPrime(int n) {
		// Corner cases
		if (n <= 1)
			return false;
		if (n <= 3)
			return true;

		// This is checked so that we can skip
		// middle five numbers in below loop
		if (n % 2 == 0 || n % 3 == 0)
			return false;

		for (int i = 5; i * i <= n; i = i + 6)
			if (n % i == 0 || n % (i + 2) == 0)
				return false;

		return true;
	}

	
	  static class Scanner { BufferedReader br; StringTokenizer st;
	  
	 Scanner() { br = new BufferedReader(new InputStreamReader(System.in)); }
	  
	  Scanner(String fileName) throws FileNotFoundException { br = new
	  BufferedReader(new FileReader(fileName)); }
	  
	  String next() throws IOException { while (st == null || !st.hasMoreTokens())
	  st = new StringTokenizer(br.readLine()); return st.nextToken(); }
	  
	  String nextLine() throws IOException { return br.readLine(); }
	  
	  int nextInt() throws IOException { return Integer.parseInt(next()); }
	  
	  long nextLong() throws NumberFormatException, IOException { return
	  Long.parseLong(next()); }
	  
	  double nextDouble() throws NumberFormatException, IOException { return
	  Double.parseDouble(next()); }
	  
	  boolean ready() throws IOException { return br.ready(); }
	  
	  }
	 

	static void sort(int[] a) {
		shuffle(a);
		Arrays.sort(a);
	}

	static void shuffle(int[] a) {
		int n = a.length;
		Random rand = new Random();
		for (int i = 0; i < n; i++) {
			int tmpIdx = rand.nextInt(n);
			int tmp = a[i];
			a[i] = a[tmpIdx];
			a[tmpIdx] = tmp;
		}
	}
}

class Pair {
	int x;
	int y;

	Pair(int a, int b) {
		x = a;
		y = b;
	}

	void print() {
		System.out.println(this.x + " " + this.y);
	}
}

class Mod{
	static final int MOD = 998244353;
	
	int add(int x, int y){
		x += y;
	    while(x >= MOD) x -= MOD;
	    while(x < 0) x += MOD;
	    return x;
	}
	
	int subtract(int x, int y) {
		x -= y;
	    while(x >= MOD) x -= MOD;
	    while(x < 0) x += MOD;
	    return x;
	}

	int mul(int x, int y)
	{
		int result = (int)((long)x*y % MOD);
	    return result>=0?result:result+MOD;
	}

	int binpow(int x, int y)
	{
	    int z = 1;
	    while(y!=0)
	    {
	        if((y & 1)!=0) 
	        	z = mul(z, x);
	        x = mul(x, x);
	        y >>= 1;
	    }
	    return z;
	}

	int inv(int x)
	{
	    return binpow(x, MOD - 2);
	}

	int divide(int x, int y)
	{
	    return mul(x, inv(y));
	}
	
	static final int N =200043;
	int[] fact;
	
	Mod() {
		fact = new int[N];
	}
	
	void precalc()
	{
	    fact[0] = 1;
	    for(int i = 1; i < N; i++)
	        fact[i] = mul(fact[i - 1], i);
	}

	int C(int n, int k)
	{
	    return divide(fact[n], mul(fact[k], fact[n - k]));
	}
}
