#include<fstream>
#define NMAX 10001
using namespace std;
ifstream in("perle.in");
ofstream out("perle.out");
int a[NMAX];
int f2(int x);
int f1(int x)
{
    if(a[x]==2)
      return f1(x+1);
    if(a[x]==1&&a[x+2]==3)
      return f2(x+4);
    return 0;
}
int f2(int x)
{
    if(a[x]==2)
      return x+1;
    if(a[x]==3)
      return f2(f1(x+1));
    if(a[x]==1&&a[x+1]==2)
      return x+3;
}
int main()
{
    int nr,k,i;
    in>>nr;
    for(int j=1;j<=nr;j++)
    {
        in>>k;
        for(i=1;i<=k;i++)
            in>>a[i];
        if(k==1||f1(1)==k+1||f1(1)==k+1)
            out<<1<<"\n";
        else
            out<<0<<"\n";
    }
    return 0;
}