T=int(input())
for _ in range(T):
    N=int(input())
    A=list(map(int,input().split()))
    now=0
    mxnow=now
    mnnow=now
    for i in range(N):
        if A[i]==2:
            now+=1
        elif A[i]==0:
            now-=1
        mxnow=max(now,mxnow)
        mnnow=min(now,mnnow)
    
    if now==0 and mxnow-mnnow==1:
        print("Yes")
    else:
        print("No")