#include <bits/stdc++.h>

using namespace std;

int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);
    int n;
    unsigned long long tmp, sum = 0;
    cin >> n;
    for (int i = 0; i < n; i++) {
        cin >> tmp;
        sum |= tmp;
    }
    bitset<61> x(sum);
    int c = x.count();
    unsigned long long ans = 1;
    ans <<= min(c, n);
    cout << ans << "\n";
    return 0;
}