import sys
input = lambda :sys.stdin.readline()[:-1]
ni = lambda :int(input())
na = lambda :list(map(int,input().split()))
yes = lambda :print("yes");Yes = lambda :print("Yes");YES = lambda : print("YES")
no = lambda :print("no");No = lambda :print("No");NO = lambda : print("NO")
#######################################################################
for _ in range(ni()):
    n = ni()
    a = na()
    if not (0 in a and 2 in a):
        No()
        continue
    
    x = a.index(2)
    z = 2
    x = (x+1) % n
    for i in range(n):
        if a[x] == z:
            No()
            break
        elif a[x] == 1:
            pass
        else:
            z = a[x]
        x = (x + 1) % n
    else:
        Yes()