import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.TreeSet;

public class Main {
	static BufferedReader br;
	static PrintWriter pw;

	public static void main(String[] args) throws Exception {
		br = new BufferedReader(new InputStreamReader(System.in));
		int t = Integer.parseInt(br.readLine());
		pw = new PrintWriter(System.out);
		for (int i = 0; i < t; i++) {
			solve();
		}
		br.close();
		pw.flush();
	}

	static void solve() throws Exception {
		int n = Integer.parseInt(br.readLine());
		String[] sa = br.readLine().split(" ");
		int[] a = new int[n];
		for (int i = 0; i < n; i++) {
			a[i] = Integer.parseInt(sa[i]);
		}

		TreeSet<Integer> set = new TreeSet<>();
		for (int i = 0; i < n - 2; i++) {
			int[] b = new int[3];
			for (int j = 0; j < 3; j++) {
				b[j] = a[i + j];
			}
			if (!check(b)) {
				set.add(i);
			}
		}
		int l = set.pollFirst();
		int r = l;
		if (!set.isEmpty()) {
			r = set.pollLast();
		}
		if (!set.isEmpty()) {
			for (int i : set) {
				if (l + 4 < i && i < r - 4) {
					pw.println("No");
					return;
				}
			}
		}
		int el = Math.min(l + 3, n);
		for (int i = Math.max(l - 2, 0); i < el; i++) {
			int er = Math.min(r + 3, n);
			for (int j = Math.max(r - 2, l + 1); j < er; j++) {
				int t = a[j];
				a[j] = a[i];
				a[i] = t;
				boolean flg = true;
				int e = Math.min(Math.max(i + 3, l + 5), n - 2);
				for (int k = Math.max(l - 2, 0); k < e; k++) {
					int[] b = new int[3];
					for (int k2 = 0; k2 < 3; k2++) {
						b[k2] = a[k + k2];
					}
					if (!check(b)) {
						flg = false;
						break;
					}
				}
				if (flg) {
					e = Math.min(r + 3, n - 2);
					for (int k = Math.max(Math.min(j - 2, r - 4), 0); k < e; k++) {
						int[] b = new int[3];
						for (int k2 = 0; k2 < 3; k2++) {
							b[k2] = a[k + k2];
						}
						if (!check(b)) {
							flg = false;
							break;
						}
					}
					if (flg) {
						pw.println("Yes");
						return;
					}
				}
				a[i] = a[j];
				a[j] = t;
			}
		}
		pw.println("No");
	}

	static boolean check(int[] a) {
		if (a[0] != a[2]) {
			if (a[0] < a[1] && a[1] > a[2]) return true;
			if (a[0] > a[1] && a[1] < a[2]) return true;
		}
		return false;
	}
}