#include <bits/stdc++.h>

using namespace std;

using ll = long long;

int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);
    int n, m;
    cin >> n >> m;
    vector<ll> a(n), sum(n + 1, 0);
    for (int i = 0; i < n; i++) {
        cin >> a[i];
        sum[i + 1] = a[i] + sum[i];
    }

    int idx = -1;
    for (int i = 0; i < n; i++) {
        if (a[i] % 2 == 0) {
            if (idx == -1) continue;
            if (i - idx >= m) cout << sum[i] - sum[idx] << "\n";
            idx = -1;
        } else {
            if (idx == -1) idx = i;
        }
    }

    if (idx != -1) {
        if (n - idx >= m) cout << sum[n] - sum[idx] << "\n";
    }
    return 0;
}