t = int(input())
for _ in range(t):
	n = int(input())
	A = list(map(int, input().split()))
	ans = [x+1 for x in range(n)] * 2
	for i in range(2*n):
		if A == ans:
			print('Yes')
			break
		tmp = [A[i]]
		for j in range(i+1, 2*n):
			tmp.append(A[j])
			if A[j] == tmp[0]:
				k = j
				break
		t = list(reversed(tmp))
		if tmp == t:
			continue
		A[i:k+1] = t
		if A == ans:
			print('Yes')
			break
	else:
		print('No')