#include <cstdio>

using namespace std;
char s[50000];
int main()
{
    freopen("xerox.in","r",stdin);
    freopen("xerox.out","w",stdout);
    int t;
    for(scanf("%d",&t);t;t--)
    {
        int n;
        int sum=0;
        int x;
        scanf("%d",&n);
        gets(s);
        for(int i=1;i<=n;i++)
        {
            scanf("%d",&x);
            sum=sum^x;
            gets(s);
        }
        printf("%d\n",(int)(sum>0));
    }
    return 0;
}