#include <bits/stdc++.h>
using namespace std;
#define int long long
const int N = 2e5 + 1;
const int INF = 1e18;
void solve(){
int n;
cin >> n;
vector < int > a(n);
for(int &i : a) cin >> i;
cout << ((accumulate(a.begin() , a.end() , 0ll) & 1) ? 1 : 0);
}
signed main(){
int tt;
cin >> tt;
while(tt--) solve();
}
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