#include <iostream>
#include<fstream>
using namespace std;



int xormax(int a,int b)
{
    return a xor b;
}

int main()
{
    ifstream fin ("xormax.in");
    ofstream fout ("xormax.out");

    int n;

    fin >> n;

    int arr[n];
    int max_curr=0;
    int max_end=0;

    int x,y;
    int x1,y2;
    for(int i=0; i<n; ++i)
    {
        fin>>arr[i];
        if(arr[i]<xormax(max_curr,arr[i]))
        {
            max_curr=xormax(max_curr,arr[i]);
            y2++;
        }
        else
        {
            max_curr=arr[i];
            x1=i;
            y2=i;
        }

        if(max_end<max_curr)
        {
            x = x1;
            y=y2;
            max_end=max_curr;

        }
    }
    fout<<max_end<<" ";
    for(int i=x; i<=y; ++i)
        fout<<i+1<<" ";
}