def mex(triplet):
    s = set(triplet)
    for i in range(5):
        if i not in s:
            return i
    return 5  # Not really needed
 
def is_good(triplet):
    return mex(triplet) == max(triplet) - min(triplet)
 
def can_make_good(a):
    n = len(a)
    for i in range(n - 2):
        sub = [a[i], a[i + 1], a[i + 2]]
        if -1 not in sub:
            if not is_good(sub):
                return False
        else:
            ok = False
            for x in range(4):
                for y in range(4):
                    for z in range(4):
                        temp = sub[:]
                        if temp[0] == -1:
                            temp[0] = x
                        if temp[1] == -1:
                            temp[1] = y
                        if temp[2] == -1:
                            temp[2] = z
                        if is_good(temp):
                            ok = True
                            break
                    if ok:
                        break
                if ok:
                    break
            if not ok:
                return False
    return True
 
def solve():
    n = int(input())
    a = list(map(int, input().split()))
    print("yes" if can_make_good(a) else "no")
 
# Driver
if __name__ == "__main__":
    t = int(input())
    for _ in range(t):
        solve()
 

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8
3
-1 -1 -1
5
1 1 1 1 0
6
5 5 1 -1 -1 1
4
-1 -1 0 -1
4
-1 1 1 -1
3
3 3 -1
5
0 0 0 0 0
7
3 0 1 4 -1 2 3