#include <fstream>

using namespace std;
ifstream fin("ssm.in");
ofstream fout("ssm.out");
int solve (int a[],int l,int r)
{
    int mid,sol;
    mid=(l+r)/2;
    sol=solve(a,l,mid);
    sol=max(sol,solve(a,mid+1),r);
}
int n,i,j,x,a[1005];
int main()
{
    fin >>n;
    for (i=1;i<=n;i++)
    {
        fin >>a[i];
    }
    fout <<solve()
    return 0;
}