import std.conv, std.functional, std.range, std.stdio, std.string;
import std.algorithm, std.array, std.bigint, std.bitmanip, std.complex, std.container, std.math, std.mathspecial, std.numeric, std.regex, std.typecons;
import core.bitop;

class EOFException : Throwable { this() { super("EOF"); } }
string[] tokens;
string readToken() { for (; tokens.empty; ) { if (stdin.eof) { throw new EOFException; } tokens = readln.split; } auto token = tokens.front; tokens.popFront; return token; }
int readInt() { return readToken.to!int; }
long readLong() { return readToken.to!long; }
real readReal() { return readToken.to!real; }

bool chmin(T)(ref T t, in T f) { if (t > f) { t = f; return true; } else { return false; } }
bool chmax(T)(ref T t, in T f) { if (t < f) { t = f; return true; } else { return false; } }

int binarySearch(alias pred, T)(in T[] as) { int lo = -1, hi = cast(int)(as.length); for (; lo + 1 < hi; ) { const mid = (lo + hi) >> 1; (unaryFun!pred(as[mid]) ? hi : lo) = mid; } return hi; }
int lowerBound(T)(in T[] as, T val) { return as.binarySearch!(a => (a >= val)); }
int upperBound(T)(in T[] as, T val) { return as.binarySearch!(a => (a > val)); }


bool isKadomatsu(int a, int b, int c) {
  return (((a > b && b < c) || (a < b && b > c)) && a != c);
}

int N;
int[] A;

bool solve() {
  int[] js;
  foreach (j; 0 .. N - 2) {
    if (!isKadomatsu(A[j], A[j + 1], A[j + 2])) {
      js ~= j;
    }
  }
  if (js.length == 0) {
    return true;
  }
  foreach (i0; js[0] .. js[0] + 3) {
    foreach (i1; 0 .. N) {
      if (i0 != i1) {
        int[] ks;
        foreach (k; i0 - 2 .. i0 + 1) if (0 <= k && k + 3 <= N) ks ~= k;
        foreach (k; i1 - 2 .. i1 + 1) if (0 <= k && k + 3 <= N) ks ~= k;
        ks = ks.sort.uniq.array;
        int num = cast(int)(js.length);
        foreach (k; ks) if (!isKadomatsu(A[k], A[k + 1], A[k + 2])) --num;
        swap(A[i0], A[i1]);
        foreach (k; ks) if (!isKadomatsu(A[k], A[k + 1], A[k + 2])) ++num;
        swap(A[i0], A[i1]);
        if (num == 0) {
          return true;
        }
      }
    }
  }
  return false;
}

void main() {
  try {
    for (; ; ) {
      const numCases = readInt();
      foreach (caseId; 0 .. numCases) {
        N = readInt();
        A = new int[N];
        foreach (i; 0 .. N) {
          A[i] = readInt();
        }
        
        const ans = solve();
        writeln(ans ? "Yes" : "No");
      }
    }
  } catch (EOFException e) {
  }
}