15

mx = -10000
for a in range(-10000, 10000):
    flag = True
    for x in range(100):
        for y in range(100):
            if not (((x <= 9) <= (x*x <= a)) and ((y*y <= a) <= (y <= 9))):
                flag = False
    if flag:
        mx = max(mx, a)
print(mx)