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

int main(){
  int t;
  cin >> t;
  while (t--){
    ll n, ans = 0;
    cin >> n;
    vector<ll> a(n + 10), vis(n + 10), dp(n + 10, 1e18);
    for (int i = 1; i <= n; i++){
      cin >> a[i];
    }
    dp[1] = 0, dp[2] = a[1], dp[3] = a[1] + a[2];
    for (int i = 1; i <= n; i++){
      dp[i + 3] = min(dp[i + 3], dp[i] + a[i + 1] + a[i + 2]);
    }
    ll j, mn = 1e18;
    for (int i = n + 1; i <= n + 3; i++){
      if (dp[i] < mn){
        mn = dp[i], j = i;
      }
    } //cout<<mn<<endl;
    ans += mn;
    mn = 1e18;
    for (int i = j; i > 0; i -= 3){
      vis[i] = 1, a[i] = 0;
    } //for(int i=1;i<=n;i++)cout<<a[i]<<" ";cout<<endl;
    dp[2] = a[1], dp[3] = a[1] + a[2];
    for (int i = 4; i <= n + 3; i++) dp[i] = 1e18;
    for (int i = 1; i <= n; i++){
      dp[i + 3] = min(dp[i + 3], dp[i] + a[i + 1] + a[i + 2]);
    }
    for (int i = n + 1; i <= n + 3; i++){
      if (!vis[i] && dp[i] < mn){
        mn = dp[i];
      }
    } //cout<<mn<<endl;
    cout << ans + mn << endl;
  }
}