#include<bits/stdc++.h>

 #define INF 0x7fffffff

 #define LL long long

 #define N 100005

 using namespace std;

 inline int ra()

 {

     int x=,f=; char ch=getchar();

     while (ch<'' || ch>'') {if (ch=='-') f=-; ch=getchar();}

     while (ch>='' && ch<='') {x=x*+ch-''; ch=getchar();}

     return x*f;

 }

 int mx[];

 int main()

 {

     int n=ra();

     for (int i=; i<=n; i++)

     {

         int x=ra(),orz=;

         for (int j=; j<=; j++)

             if (x&(<<j))

                 orz=max(orz,mx[j]+);

         for (int j=; j<=; j++)

             if (x&(<<j))

                 mx[j]=orz;

     }

     int ans=;

     for (int j=; j<=; j++)

         ans=max(ans,mx[j]);

     cout<<ans;

     return ;

 }