#include<bits/stdc++.h>
using namespace std;
int m[10000024];
int main()
{
    ios_base::sync_with_stdio(false);
    freopen("karea.in","r",stdin); freopen("karea.out","w",stdout);
    int n,k;
    cin>>n>>k;
    long long s=0,ind=0,maxind=0,maxs=-10000000000;
    for(int i=k;i<k+n;i++) cin>>m[i];
    for(int i=k;i<=2*k;i++) s+=m[i];
    for(int i=k;i<n+k;i++)
    {
        if(s>maxs){maxs=s;ind=i-k;}
        s-=m[i-k];
        s+=m[i+1+k];
    }
    cout<<ind<<endl;
    return 0;
}