#include <bits/stdc++.h>
using namespace std;

void solve() {
	int N;
	cin >> N;
	vector<int> H(N);
	for(int i = 0; i < N; ++i) cin >> H[i];
	
	int cnt = 0;
	for(int i = 1; i + 1 < N; ++i) {
		if((H[i - 1] < H[i]) != (H[i] < H[i + 1])) cnt += 1;
	}
	
	cout << (H[0] > H[1] and cnt == 3 ? "Yes" : "No") << "\n";
}

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