B.cpp

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

typedef long long int ll;
typedef long double ld;
typedef pair<ll,ll> pll;
#define all(v) (v).begin(),(v).end()
#define rall(v) (v).rbegin(),(v).rend()
#define endl "\n"
#define fast ios_base::sync_with_stdio(false);cin.tie(NULL);

ll const inf = 1e18;
ll const maxn = 1e6+5;
ll const mod = 1e9+7;

// code begins here

int main(){
    fast;
    
    ll t;
    cin>>t;
    
    while(t--){
        ll n;
        cin>>n;
        
        vector<ll> arr(n);
        for(auto &u: arr)
            cin>>u;
        
        ll l = 0, r = n-1;
        while(arr[l]==0)
            l++;
        while(arr[r]==0)
            r--;
        
        ll cnt = 0;
        for(ll i = l;i<=r;i++)
            if(!arr[i])
                cnt++;
            
        cout<<cnt<<endl;
        
    }
    
    return 0;
}