#include <bits/stdc++.h>
using namespace std;
void solve() {
	int N;
	cin >> N;
	std::vector<int> A(N);
	for (auto& a : A) {
		cin >> a;
	}
	A.push_back(A[0]);
	for (int i = 0; i < N; i ++) {
		if (A[i] != 1 && A[i] == A[i + 1]) {
			puts("No");
			return;
		}
	}
	bool zr = false, tw = false;
	for (int i = 0; i < N; i ++) {
		zr = zr || (A[i] == 0);
		tw = tw || (A[i] == 2);
	}
	cout << ((zr && tw) ? "Yes" : "No") << endl;
}
int main() {
	int T;
	cin >> T;
	while (T--) {
		solve();
	}
}