func_code_string: #include <bits/stdc++.h>   using namespace std;   void solve() {     int n;     cin >> n;     vector<int> arr(n);     for (auto &x : arr) cin >> x;     int height = 1;     for (int i = 0; i < n; i++) {       if (i > 0 and !arr[i - 1] and !arr[i]) {         cout << -1 <<   n ;         return;       }       height += arr[i] + (i > 0 and arr[i] and arr[i - 1] ? 4 : 0);     }     cout << height << endl;   }   int main(int argc, char const *argv[]) {     int tc;     cin >> tc;     while (tc--) {       solve();     }     return 0;   }   