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#include<iostream>
#include<fstream>
#include<climits>
using namespace std;
ifstream fin("secvmax.in");
ofstream fout("secvmax.out");
int v[10005];
int lcr, start, stop, suma;
int main()
{
    int i, smax=INT_MIN, x, n, lmax=INT_MIN;
    fin>>n;
    for(i=1; i<=n; i++)
    {
        fin>>x;
        if(x%2==0)
        {
            lcr++;
            suma=suma+x;
        }
        else
        {
            if(lcr>=lmax)
            {
                if(suma>smax)
                {
                    lmax=lcr;
                    start=i-lcr;
                }
            }
            lcr=0;
            suma=0;
        }
    }
    if(lcr>lmax)
            {
                if(suma>smax)
                {
                    lmax=lcr;
                    start=i-lcr;
                }
            }
    stop=start+lmax-1;
    fout<<start<<" "<<stop;
    fin.close();
    fout.close();
    return 0;
}