#include <fstream>

using namespace std;
ifstream in ("secventa.in");
ofstream out ("secventa.out");
const int N=500002;
int v[N],deq[N];
int main()
{
    int n,k,i,st=0,dr=-1,start,stop,maxi=0;
    in>>n>>k;
    for (i=1;i<=n;i++)
        in>>v[i];
    for (i=1;i<=n;i++)
    {
        while (st<=dr && deq[st]==i-k)
            st++;
        while (st<=dr && v[deq[dr]]>v[i])
            dr--;
        dr++;
        deq[dr]=i;
        if (st<=dr && i>k)
            if (maxi<v[deq[st]])
                maxi=v[deq[st]], start=i-k+1, stop=i;
    }
    out<<start<<" "<<stop;
    return 0;
}