This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include<bits/stdc++.h>
using namespace std;
const int N = 100100;
int n;
void solve() {
	cin >> n;
	for (int x, i = 1; i <= n; ++i) {
		cin >> x;
		if (x & 1) cout << 1;
		else cout << 0;
	}
	cout << '\n';
}
int main() {
	ios::sync_with_stdio(0);
	cin.tie(0); cout.tie(0);
	int t; cin >> t;
	while (t--) solve();
}
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