#import<fstream>

using namespace std;
ifstream fin("perle.in");
ofstream fout("perle.out");

int n, i, s[10005], sir;

int C(int x);

int B(int x)
{
    if(s[x] == 1 && s[x+2] == 3){
        return C(x + 4);
    }
    else if(s[x] == 2){
        return B(x + 1);
    }
    return 0;
}

int C(int x){
    if(s[x] == 2){
        return x+1;
    }
    else if(s[x] == 3){
         return C(B(x + 1));
    }
    else if(s[x] == 1 && s[x+1] == 2){
        return x+3;
    }
    return 0;
}

int main(void){
    fin>>n;
    for(int nr = 1; nr<=n; nr++){
        fin >> sir;
        for(i=1; i<=sir; i++){
             fin>>s[i];
        }
        if(sir == 1 || B(1) == sir + 1 || C(1) == sir + 1){
             fout << 1 << '\n';
        }
        else{
             fout << 0 << '\n';
        }
    }
}