t = int(input())
for _ in range(t):
  n=int(input())
  arr = map(int,input().split())
  b = sorted(arr)
  # print(arr)
  # print(b)
  a=[]
  for i in range(1,n+1):
    a.append(i)
    # print(i)
  if a==b:
    print("YES")
  else:
    print("NO")