import math
def solve() :
    N = int(input())
    A = list(map(int, input().split()))
    ret = 1
    for a in A :
        ret *= a
    pk = math.sqrt(ret)
    pk -= 5
    while pk * pk < ret :
        pk += 1
    if pk * pk == ret :
        print("Yes")
    else :
        print("No")
T = int(input())
for i in range(T) :
    solve()