4020. Orks

#include <bits/stdc++.h>

using namespace std;

#define int long long
#define mp make_pair
#define pb push_back

const int N = 11111;
const int INF = (int)1e18;

int dp[N];

signed main()
{
    ios::sync_with_stdio(0); cin.tie(nullptr); cout.tie(nullptr);
    //freopen("input.txt","r",stdin);
    //freopen("output.txt","w",stdout);

    int n,k;
    cin >> n >> k;

    int mn;

    for(int i=k+1;i<=n+k;i++)
    {
        mn = INF;
        cin >> dp[i];
        for(int j=i-1;j>=i-k-1;j--)
        {
            mn = min(dp[j],mn);
        }
        dp[i] += mn;
    }

    cout << dp[n+k];

    return 0;
}