#include <fstream>
using namespace std;

ifstream fin("secventa.in");
ofstream fout("secventa.out");

int n;

int main()
{
    fin >> n;

    int x, y, cnt = 1, st, lmax = 0, stMax;
    long long sum = 0, sumMax = 0;

    fin >> x;
    sum += x;
    for (int i = 2; i <= n; ++i)
    {
        fin >> y;
        if (y % 2 != x % 2)
        {
            if (cnt == 1)
                st = i - 1;
            cnt++;
            sum += y;
        }
        else
        {
            cnt = 1;
            sum = y;
        }
         if (cnt > lmax)
        {
            lmax = cnt;
            sumMax = sum;
            stMax = st;
        }
        else
            if (cnt == lmax && sum >= sumMax)
            {
                sumMax = sum;
                stMax = st;
            }
        x = y;
    }

    fout << stMax << ' ' << stMax + lmax - 1;
}