XOR Of Sum Of All Pairs

package pep.Day82;

public class XOR_of_Sum_of_all_pairs {
    public static void main(String[] args) {
        int[] arr = {1, 3, 5, 7};

        int ans = 0;
        for (int i : arr) {
            ans = ans ^ i;
        }

        System.out.println(ans);
    }
}