for _ in range(T := int(input())):
  N = int(input())
  A = list(map(int, input().split()))

  memo = 1
  for a in A*2:
    if a == 1:
      continue
    if a == memo:
      print("No")
      break
    memo = a
  else:
    print("No" if memo == 1 else "Yes")