/* ---------- STL Libraries ---------- */
// IO library
#include <cstdio>
#include <fstream>
#include <iomanip>
#include <ios>
#include <iostream>

// algorithm library
#include <algorithm>
#include <cmath>
#include <numeric>
#include <random>
#include <cstring>

// container library
#include <array>
#include <bitset>
#include <deque>
#include <map>
#include <unordered_map>
#include <queue>
#include <set>
#include <string>
#include <tuple>
#include <vector>
#include <stack>

/* ---------- Namespace ---------- */
using namespace std;

/* ---------- Type ---------- */
using ll = long long;
#define int ll
#define P pair<ll, ll>

/* ---------- Constants  */
const double PI = 3.141592653589793238462643383279;
const ll MOD = 1e9 + 7;
const int INF = 1LL << 55;

/* v-v-v-v-v-v-v-v-v Main Part v-v-v-v-v-v-v-v-v */
signed main() {
    int N, M;
    cin >> N >> M;
    vector<int> A(N);
    for (int i = 0; i < N; i++) cin >> A[i];

    vector<int> S(N + 1, 0);
    for (int i = 0; i < N; i++) {
        S[i+1] = S[i] + A[i];
    }

    int cnt = 0;
    for (int i = 0; i < N; i++) {
        if (A[i] % 2 == 0) {
            if (cnt >= M) {
                cout << S[i-1 + 1] - S[i-1 - cnt + 1] << endl;
            }

            cnt = 0;
        } else {
            cnt++;
        }
    }

    if (cnt >= M) cout << S[N-1 + 1] - S[N-1 - cnt + 1] << endl;

    return 0;
}