func_code_string: #include <bits/stdc++.h>   using namespace std;   const int MAXN = 1e5 + 100;   int arr[MAXN];   int n, x, t;   long long ans;   int main() {     cin >> n;     for (int i = 0; i < n; i++) {       cin >> x;       if (t <= 1)         arr[++t] = x;       else {         while (t > 1 && arr[t] <= arr[t - 1] && arr[t] <= x) {           ans += min(arr[t - 1], x);           t--;         }         arr[++t] = x;       }     }     sort(arr + 1, arr + t + 1, greater<int>());     for (int i = 3; i <= t; i++) ans += arr[i];     return cout << ans << endl, 0;   }   