#include<fstream>
#include<vector>
using namespace std;
#define nmax 10004
ifstream in("perle.in");
ofstream out("perle.out");
vector<int> x(nmax);
int n;

int tip1(int lc);
int tip2(int lc);

int tip1(int lc)
{
    if(x[lc]==2) return tip1(lc+1);
    if(x[lc]==1&&x[lc+2]==3) return tip2(lc+4);
    return 0;
}

int tip2(int lc)
{
    if(x[lc]==2) return lc+1;
    if(x[lc]==3) return tip2(tip1(lc+1));
    if(x[lc]==1&&x[lc+1]==2) return lc+3;
    return 0;
}


int main()
{
    int i,j,k;
    in>>n;
    x.clear();
    for(i=1;i<=n;i++)
    {
        in>>k;
        for(j=1;j<=k;j++)
        {
            in>>x[j];
        }
        if(k==1||tip1(1)==k+1||tip2(1)==k+1) out<<"1\n";
        else out<<"0\n";
    }
    in.close();
    out.close();
    return 0;
}