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    public static int sansaXor(List arr) { // Write your code here int n = arr.size(); int c = 0;

        if (n % 2 == 0) {
            return 0;
        }
    
        for (int i = 0; i < n; i += 2) {
            c ^= arr.get(i);
        }
    
        return c;
    

    }