import sequtils, strutils, tables

let t = parseInt readLine stdin

proc fn(): bool =
  let
    n = parseInt readLine stdin
    a = stdin.readLine.split.map parseInt
    cntT = a.toCountTable
  if a[0] != 1: return false
  if a[^1] != n: return false
  if cntT.largest.val != 2: return false
  if cntT.smallest.val != 2: return false
  for i in 1 .. a.high:
    let x = abs a[i] - a[pred i]
    if x notin {1, pred n}: return false
  return true

for _ in 0 ..< t:
  echo if fn(): "Yes" else: "No"