#include <fstream>
using namespace std;
ifstream fin("perle.in");
ofstream fout("perle.out");
int v[10005];
int C(int i);
int B(int i)
{
    if(i<0)
        return -1;
    if(v[i]==2)
        return B(i+1);
    if(v[i]==1&&v[i+2]==3)
        return C(i+4);
    return -1;
}
int C(int i)
{
    if(i<0)
        return -1;
    if(v[i]==2)
        return i+1;
    if(v[i]==3)
        return C(B(i+1));
    if(v[i]==1&&v[i+1]==2)
        return i+3;
    return -1;
}
int main()
{
    int i, j,l,n;
   fin>>n;
   for(i=1;i<=n;i++){
        fin>>l;
        for(j=1;j<=l;j++){
            fin>>v[j];
        }
        if ( B(1)==l+1 || C(1)==l+1 || l==1)
                fout<<1<<"\n";
        else
                fout<<0<<"\n";
   }
   return 0;
}