#include <bits/stdc++.h>
using namespace std;
const long long mod = 1e9 + 7;
long long power(long long a, long long b, long long m = mod) {
  if (b < 0) {
    return power(power(a, -b), mod - 2);
  }
  long long x = 1;
  while (b) {
    if (b & 1) {
      x = 1ll * x * a % m;
    }
    a = 1ll * a * a % m;
    b /= 2;
  }
  return x;
}
struct Edge {
  int from, to, capacity, cost;
};
vector<vector<int>> adj, cost, capacity;
const int INF = 1e9;
void shortest_paths(int n, int v0, vector<int>& d, vector<int>& p) {
  d.assign(n, INF);
  d[v0] = 0;
  vector<bool> inq(n, false);
  queue<int> q;
  q.push(v0);
  p.assign(n, -1);
  while (!q.empty()) {
    int u = q.front();
    q.pop();
    inq[u] = false;
    for (int v : adj[u]) {
      if (capacity[u][v] > 0 && d[v] > d[u] + cost[u][v]) {
        d[v] = d[u] + cost[u][v];
        p[v] = u;
        if (!inq[v]) {
          inq[v] = true;
          q.push(v);
        }
      }
    }
  }
}
int min_cost_flow(int N, vector<Edge>& edges, int K, int s, int t) {
  adj.assign(N, vector<int>());
  cost.assign(N, vector<int>(N, 0));
  capacity.assign(N, vector<int>(N, 0));
  for (Edge e : edges) {
    adj[e.from].push_back(e.to);
    adj[e.to].push_back(e.from);
    cost[e.from][e.to] = e.cost;
    cost[e.to][e.from] = -e.cost;
    capacity[e.from][e.to] = e.capacity;
  }
  int flow = 0;
  int cost = 0;
  vector<int> d, p;
  while (flow < K) {
    shortest_paths(N, s, d, p);
    if (d[t] == INF) break;
    int f = K - flow;
    int cur = t;
    while (cur != s) {
      f = min(f, capacity[p[cur]][cur]);
      cur = p[cur];
    }
    flow += f;
    cost += f * d[t];
    cur = t;
    while (cur != s) {
      capacity[p[cur]][cur] -= f;
      capacity[cur][p[cur]] += f;
      cur = p[cur];
    }
  }
  if (flow < K)
    return -1;
  else
    return cost;
}
signed main() {
  ios_base::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
  int n;
  cin >> n;
  vector<int> a(n);
  vector<Edge> ed;
  for (int i = 0; i < n; i++) {
    cin >> a[i];
  }
  for (int i = 1; i <= n; i++) {
    ed.push_back({0, i, 1, 0});
    ed.push_back({n + i, 2 * n + 1, 1, 0});
  }
  for (int i = 1; i <= n; i++) {
    for (int j = 1; j <= n; j++) {
      ed.push_back({i, n + j, 1, -abs(i - j) * a[i - 1]});
    }
  }
  cout << -min_cost_flow(2 * n + 2, ed, n, 0, 2 * n + 1) << endl;
  return 0;
}
