#include using namespace std; const int Lim=1<<19,MaxBit=18; int v1[2*Lim],v2[2*Lim]; int main() { //freopen("file.in", "r", stdin); //freopen("file.out", "w", stdout); int n,sol=0,x; scanf("%d",&n); for(int i=1;i<=n;i++) { scanf("%d",&x); v1[x]=x; } for(int mask=1;mask<=Lim;mask++) for(int i=0;i<=MaxBit;i++) v1[mask|(1<