#include<bits/stdc++.h>
#define int long long
using namespace std;

signed main() {
    int n;
    cin >> n;
    int a[n], dp[n] = {};
    for (int i = 0; i < n; i++) cin >> a[i];
    for (int i = 10; i < n; i++) {
        int cur_min = INT_MAX;
        for (int j = max(0ll, i - 9); j <= i; j++) cur_min = min(cur_min, a[j]);
        for (int j = max(0ll, i - 10); j < i; j++) {
            dp[i] = max(dp[j] + cur_min * (j == i - 10), dp[i]);
        }
    }
    int sum = 0;
    for (int i = 0; i < n; i++) sum += a[i];
    cout << sum - dp[n - 1];
}