U = 10 ** 7

memo = []
r = 0
while r * r <= U:
    memo.append(r * r)
    r += 1

cnt = [0] * (U + 1)
for x in memo:
    for y in memo:
        if x + y > U:
            break
        if x and y:
            cnt[x + y] += 4
        else:
            cnt[x + y] += 2

X, Y = map(int, input().split())
ans = max(cnt[i] for i in range(X, Y + 1))
print(ans)