def is_square(apositiveint):
  x = apositiveint // 2
  seen = set([x])
  while x * x != apositiveint:
    x = (x + (apositiveint // x)) // 2
    if x in seen: return False
    seen.add(x)
  return True

t = int(input())

for i in range(t):
    n = int(input())
    a = list(map(int, input().split()))
    mul = 1
    for e in a:
        mul *= e
    if is_square(mul):
        print("Yes")
    else:
        print("No")