#include<fstream>
using namespace std;
ifstream f("secv2.in");
ofstream g("secv2.out");
int i,j,n,st,dr,k,v[50005];
int main()
{
f>>n>>k;
for(i=1;i<=n;++i)
f>>v[i],v[i]+=v[i-1];
int x=st=1,y=dr=k,sum=v[k],M=v[k];
for(i=k+1;i<=n;++i)
{
if(v[i]-v[i-k]>sum+v[i]-v[i-1])
{
st=i-k+1;
dr=i;
sum=v[i]-v[i-k];
}
else
{
sum+=v[i]-v[i-1];
dr=i;
}
if(sum>M)
M=sum,x=st,y=dr;
}
g<<x<<""<<y<<""<<M;
return 0;
}