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

ifstream f("xormax.in");
ofstream g("xormax.out");

int n, nr, i, v[2001], smax, j, x[2001], p1, p2;

int main()
{
    f >> n;
    for (i = 1; i <= n; i++) {
        f >> v[i];
        x[i] = x[i - 1] ^ v[i];
    }
    smax = 0;

    for (i = 1; i <= n; i++)
        for (j = i; j <= n; j++)
        {
            nr = x[j] ^ x[i - 1];
            if (nr > smax) {
                smax = nr;
                p1 = i;
                p2 = j;
            }
        }



    g << smax << ' ' << p1 << ' ' << p2;
    return 0;
}