#include <bits/stdc++.h>

using i64 = long long;

void solve() {
    int N;
    std::cin >> N;
    std::vector<int> A(N);
    for (auto &e : A) std::cin >> e;
    if (A[0] == 1) {
        for (auto &e : A) e = 1 - e;
    }
    if (A[N - 1] == 0) {
        bool isOk = false;
        for (int i = 0; i < N - 1; ++i) {
            if (A[i] == 1 and A[i + 1] == 1) {
                isOk = true;
            }
        }

        int s = 1;
        for (int i = 1; i < N; ++i) {
            if (A[i] != A[i - 1]) {
                ++s;
            }
        }
        if (s >= 7 and s % 4 == 3) isOk = true;
        std::cout << (isOk ? "Yes" : "No") << std::endl;
    } else {
        std::cout << "Yes" << std::endl;
    }
}

int main() {
    int T;
    std::cin >> T;
    while (T--) solve();
}