#define _USE_MATH_DEFINES
#include <algorithm>
#include <cstdio>
#include <functional>
#include <iostream>
#include <cfloat>
#include <climits>
#include <cstring>
#include <cmath>
#include <fstream>
#include <map>
#include <queue>
#include <random>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <time.h>
#include <vector>
using namespace std;

typedef long long ll;
typedef unsigned long long ull;
typedef pair<int, int> i_i;
typedef pair<ll, int> ll_i;
typedef pair<double, int> d_i;
typedef pair<ll, ll> ll_ll;
typedef pair<double, double> d_d;
struct edge { int u, v; ll w; };

ll MOD = 1000000007;
ll _MOD = 1000000009;
double EPS = 1e-10;

int main() {
	int N; cin >> N;
	vector<ll> A(N);
	for (int i = 0; i < N; i++)
		cin >> A[i];
	int k = 0;
	for (int j = 62; j >= 0; j--) {
		for (int i = k; i < N; i++)
			if ((A[i] >> j) & 1)
				swap(A[k], A[i]);
		if (k < N && (A[k] >> j) & 1);
		else continue;
		for (int i = k + 1; i < N; i++)
			if ((A[i] >> j) & 1)
				A[i] ^= A[k];
		k++;
	}
	cout << (1LL << k) << endl;
}