#include<fstream>
#define NMAX 5000010
using namespace std;
int V[NMAX],Deque[NMAX],P,U,N,K;
long long S;
int main()
{
    ifstream f("deque.in");
    ofstream g("deque.out");
    int i;
    f>>N>>K;
for(i=1;i<=N;i++)
f>>V[i];
P=1;
U=0;
for(i=1;i<=N;i++)
{
                 while((P<=U)&&V[i]<=V[Deque[U]])
                 U--;
                 Deque[++U]=i;
                 if(Deque[P]==i-K) P++;
                 if(i>=K)
                 S+=V[Deque[P]];
                 }
                 g<<S;
                 }