#include <bits/stdc++.h>
using namespace std;
using ll = long long;
void solve () {
	int a;
	cin >> a;
	vector<ll> v(a);
	for (int i = 0; i < a; i++) cin >> v[i];
	bool cat = true;
	int count = 0;
	for (int i = 1; i < a; i++) {
		if (cat) {
			if (v[i] > v[i-1]) {
				cat = false;
				count++;
			}
		}
		else {
			if (v[i] < v[i-1]) {
				cat = true;
				count++;
			}
		}
	}
	if (count == 3) cout << "Yes" << endl;
	else cout << "No" << endl;
	return;
}
int main() {
	int a;
	cin >> a;
	while (a--) {
		solve();
	}
}