#include <bits/stdc++.h>
using ll = long long;
int main()
{
    int N, M; std::cin >> N >> M;
    std::vector<ll> A(N);
    for(auto& e:A){std::cin >> e;}
    for(int p = 0; p < N; ){
        if (A[p]%2==0) {
            p++;
        } else {
            ll sum = 0;
            int l = 0;
            for(;p < N and A[p]%2==1;p++){l++, sum += A[p];}
            if(l >=M){std::cout << sum << std::endl;}
        }
    }
    return 0;
}