#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using pi = pair<int, int>;
using pl = pair<long long, long long>;
using vi = vector<int>;
using vl = vector<long long>;
using vpi = vector<pair<int, int>>;
using vpl = vector<pair<long long, long long>>;
#define fur(i, a, b) for(ll i = a; i <= (ll)b; ++i)
#define ruf(i, a, b) for(ll i = a; i >= (ll)b; --i)
#define fr first
#define sc second
#define mp make_pair
#define pb emplace_back
#define nl "\n"
#define all(x) (x).begin(),(x).end()
#define rall(x) (x).rbegin(),(x).rend()
const ll inf = 1e16L;
int main()
{
ios::sync_with_stdio(0);
cin.tie(0);
ll n;
cin >> n;
ll t[n + 1];
fur(i, 1, n)
cin >> t[i];
ll dp[n + 1];
dp[0] = 0;
fur(i, 1, n) {
dp[i] = inf;
ll mx = t[i];
ruf(j, i, 1) {
mx = max(mx, t[j]);
dp[i] = min(dp[i], dp[j - 1] + mx * (n - j + 1));
}
}
cout << dp[n] << nl;
}
