T = int(input())
for _ in range(T):
    N = int(input())
    A = list(map(int, input().split()))
    cnt = 0
    for a in A:
        if a==1:
            cnt+=1
    if cnt*2==N:
        print("Yes")
        continue

    if cnt>N-cnt:
        sa = cnt - (N-cnt)
        chk = 1
    else:
        sa = (N-cnt) - cnt
        chk  =0
    tmp = 0
    for i in range(N-1):
        if A[i]==A[i+1]==chk:
            tmp += 1
        if tmp==sa:
            break
    if tmp==sa:
        print("Yes")
    else:
        print("No")