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 = [x for x in na() if x != 1]
    if len(a) and len(a)%2 == 0 and (a == [[0,2][i%2] for i in range(len(a))] or a == [[2,0][i%2] for i in range(len(a))]):
        Yes()
    else:
        No()