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#include <iostream>
#include <fstream>
using namespace std;
ifstream f("perle.in");
ofstream g("perle.out");
int n,v[10001],i,j,m;
int B(int x);
int C(int x);
int B(int x)
{
if(v[x]==2)
return B(x+1);
if(v[x]==1&&v[x+2]==3)
return C(x+4);
return 0;
}
int C(int x)
{
if(v[x]==2)
return x+1;
if(v[x]==3)
return C(B(x+1));
if(v[x]==1&&v[x+1]==2)
return x+3;
}
int main()
{
f>>n;
for(i=1;i<=n;i++)
{
f>>m;
for(j=1;j<=m;j++)
f>>v[j];
if(m==1||B(1)==m+1||C(1)==m+1)
g<<1<<"\n";
else
g<<0<<"\n";
}
return 0;
}