#include <bits/stdc++.h>
using namespace std;
bool is_kadomatsu(int a, int b, int c){
  return (b < a && b < c || b > a && b > c) && a != c;
}
int main(){
  int T;
  cin >> T;
  for (int i = 0; i < T; i++){
    int N;
    cin >> N;
    vector<int> A(N);
    for (int j = 0; j < N; j++){
      cin >> A[j];
    }
    vector<int> B(N, 0);
    for (int j = 0; j < N - 2; j++){
      if (!is_kadomatsu(A[j], A[j + 1], A[j + 2])){
        B[j]++;
        B[j + 1]++;
        B[j + 2]++;
      }
    }
    vector<int> p;
    for (int j = 0; j < N; j++){
      if (B[j] > 0){
        p.push_back(j);
      }
    }
    if (p.size() > 6){
      cout << "No" << endl;
    } else {
      bool ok = false;
      int cnt = p.size();
      for (int j = 0; j < cnt; j++){
        for (int k = j + 1; k < cnt; k++){
          swap(A[p[j]], A[p[k]]);
          bool ok2 = true;
          for (int l = 0; l < N - 2; l++){
            if (!is_kadomatsu(A[l], A[l + 1], A[l + 2])){
              ok2 = false;
            }
          }
          if (ok2){
            ok = true;
          }
        }
      }
      if (ok){
        cout << "Yes" << endl;
      } else {
        cout << "No" << endl;
      }
    }
  }
}