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

int main()
{
    ifstream cin("secv2.in");
    ofstream cout("secv2.out");
    int ;
    cin>>n>>k;
    s[0]=0;
    for(i=1;i<=k;i++){
    cin>>x;
    s[i]=s[i-1]+x;}
    smax=sc=s[k];
    pc=pmax=1;
    umax=k;
    for(i=k;i<=n;i++){cin>>x;
                      s[i]=s[i-1]+x;
                      if(s[i]-s[i-k]>sc+x) { sc=s[i]-s[i-k];pc=i-k+1;}else sc+=x;
                      }}
    return 0;
}