T = int(input())
for t in range(T):
    N = int(input())
    A = list(map(int, input().split()))

    if sorted(A) != sorted(list(range(1,N+1)) * 2):
        print("No")
        continue
    if A[0] != 1 or A[2 * N - 1] != N:
        print("No")
        continue

    for i in range(1, 2 * N):
        if not(abs(A[i] - A[i - 1]) == 1 or abs(A[i] - A[i - 1]) == N - 1):
            print("No")
            break
    else:
        print("Yes")