def RLE(s):
    result = []
    count = 1
    for i in range(1, len(s)):
        if s[i] == s[i - 1]:
            count += 1
        else:
            result.append((s[i - 1], count))
            count = 1
    result.append((s[-1], count))
    return result


T = int(input())
for _ in range(T):
    N = int(input())
    A = "".join(input().split())
    cnt1 = A.count("1")
    cnt0 = A.count("0")
    rle = RLE(A)
    if cnt1 > cnt0:
        rle1 = len(rle[0::2]) if rle[0][0] == "1" else len(rle[1::2])
        if cnt0 >= rle1:
            print("Yes")
        else:
            print("No")
    elif cnt1 < cnt0:
        rle0 = len(rle[0::2]) if rle[0][0] == "0" else len(rle[1::2])
        if cnt1 >= rle0:
            print("Yes")
        else:
            print("No")
    else:
        print("Yes")