#include<bits/stdc++.h>
#define int long long
using namespace std;
constexpr int mod=1000000007;
int N,A[1<<20];
signed main(){
    cin>>N;
    for(int i=0;i<N;i++) cin>>A[i];
    for(int i=0;i<N;i++)if(A[i])goto home;
    cout<<N<<endl;
    return 0;
    home:;
    map<int,int>mp;
    int n,ans=1; cin>>n;
    for(int i=1;i<N;i++){
        int b=ans;
        (ans*=2)%=mod;
        (ans+=mod-mp[n])%=mod;
        (mp[n]+=b)%=mod;
        n^=A[i];
    }
    cout<<ans<<endl;
}