#include <bits/stdc++.h>
using namespace std;

int main(){
    int n, m; cin >> n >> m;
    vector <int> A(n);
    for (int i = 0; i < n; i++){
        cin >> A.at(i);
    }

    int cnt = 0;
    long long keep_sum = 0;
    for (auto a: A){
        if(a % 2 == 0){
            if (cnt >= m){
                cout << keep_sum << endl;
            }

            cnt = 0;
            keep_sum = 0;
            continue;
        }

        cnt += 1;
        keep_sum += a;
    }
    if (cnt >= m){
       cout << keep_sum << endl;
    }

}