X, Y = map(int, input().split())
A = [0] * (Y + 1)
r = int(Y ** 0.5) + 2
ans = 0
for i in range(1, r):
    a = i ** 2
    if a <= Y:
        A[a] += 1
    a = 2 * i ** 2
    if a <= Y:
        A[a] += 1
    for j in range(i + 1, r):
        a = i ** 2 + j ** 2
        if a <= Y:
            A[a] += 2
print(max(A[X:Y + 1]) * 4)