#include <bits/stdc++.h> 
using namespace std;
int n;
int a[60],ans;
void sou(int x,int y,int i){
    if(i == n+1){
        if(x == y)ans++;  
        return;
    }
    sou(x^a[i],y&a[i],i+1);
    sou(x,y,i+1);
}
int main(){
    freopen("mgrid.in","r",stdin);
    freopen("mgrid.out","w",stdout);
    scanf("%d",&n);
    for(int i = 1;i <= n;i++){
        scanf("%d",&a[i]);
    }
    sou(0,(1<<20)-1,1);
    printf("%d\n",ans);
    
    return 0;
    
}