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

#define rep(i,n) for(int i = 0; i < (int)(n); i++)
constexpr int inf = 2e9;
/*
#include <atcoder/all>
using namespace atcoder;

#include <boost/multiprecision/cpp_int.hpp>
#include <boost/math/common_factor_rt.hpp>
namespace mp = boost::multiprecision;
*/
using ll = long long;
int main()
{
    int T;
    cin >> T;
    while (T--)
    {
        int N;
        cin >> N;
        vector H(N,0);
        rep(i,N) cin >> H[i];
        int phase = 0;
        for (int i = 0; i < N - 1; i++)
        {
            if (H[i] == H[i + 1])
            {
                cout << "No" << endl;
                goto a;
            }
            if (phase % 2 == 0)
            {
                if (H[i] < H[i + 1]) phase++;
            }
            if (phase % 2 == 1)
            {
                if (H[i] > H[i + 1]) phase++;
            }
        }
        if (phase == 3) cout << "Yes" << "\n";
        else cout << "No" << "\n";
        a:
    }
}