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#include <bits/stdc++.h>
using namespace std;
ifstream f("xerox.in");
ofstream g("xerox.out");
int main()
{
int T,N,M,S,dx,dy,x,y;
f>>T;
while(T--)
{
S=0;
f>>N;
f.ignore(numeric_limits<streamsize>::max(),'\n');
while(N--)
{
f>>M;
S ^=M;
f.ignore(numeric_limits<streamsize>::max(),'\n');
}
g<<((S!=0)? "1\n" : "0\n");
}
f.close();
g.close();
return 0;
}