#include <iostream>
#include <string>
#include <vector>
#include <set>
#include <algorithm>
using namespace std;

long long N;
int main(void)
{
    cin >> N;
    int t=0;
    for (int i = 0; i < N; ++i)
    {
        int a; cin >> a;
        t = t|a;
    }
    int ans=1;
    while(t){
        if(t&1) ans*=2;
        t>>=1;
    }
    cout << ans << endl;
        
    return 0;
}