#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i = 0; i < int(n); i++)
using ll = long long;
using P = pair<int, int>;

bool kadomatsu(ll a, ll b, ll c) {
    if (a != b && b != c && c != a && (max({a, b, c}) == b || min({a, b, c}) == b)) return true;
    return false;
}

bool kadomatsu(vector<int> a) {
    int n = a.size();
    rep(i, n - 2) {
        if (!kadomatsu(a[i], a[i + 1], a[i + 2])) {
            return false;
        }
    } 
    return true;
}

void solve() {
    int n;
    cin >> n;
    vector<int> a(n);
    rep(i, n) cin >> a[i];
    vector<int> x;
    rep(i, n - 2) {
        if ((a[i] < a[i + 1] && a[i + 1] < a[i + 2]) || (a[i] > a[i + 1] && a[i + 1] > a[i + 2])) {
            x.push_back(a[i]);
            x.push_back(a[i + 1]);
            x.push_back(a[i + 2]);
        }
    }
    if ((int)x.size() > 20) {
        cout << "No" << endl;
        return;
    }
    rep(i, x.size()) {
        rep(j, x.size()) {
            swap(a[i], a[j]);
            if (kadomatsu(a)) {
                cout << "Yes" << endl;
                return;
            }
            swap(a[i], a[j]);
        }
    }
    cout << "No" << endl;
}

int main() {
    int t;
    cin >> t;
    while (t--) {
        solve();
    }
    return 0;
}