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

vector<pair<char, int>> run_length(string s) {
    int n = s.size();
    vector<pair<char, int>> ans;
    ans.push_back({s[0], 1});
    for (int i = 1; i < n; i++) {
        if (s[i] == ans.back().first) {
            ans.back().second++;
        } else {
            ans.push_back({s[i], 1});
        }
    }
    return ans;
}

int main() {
    cin.tie(nullptr);
    ios_base::sync_with_stdio(false);
    int t;
    cin >> t;
    while (t--) {
        string s;
        int n;
        cin >> n;
        vector<int> h(n);
        rep(i, n) cin >> h[i];
        rep(i, n - 1) {
            if (h[i] < h[i + 1])
                s.push_back('+');
            else
                s.push_back('-');
        }
        auto v = run_length(s);
        if (v.size() == 4 && v[0].first == '-') {
            cout << "Yes" << endl;
        } else {
            cout << "No" << endl;
        }
    }

    return 0;
}