X, Y = map(int, input().split())

square = [i ** 2 for i in range(4000)]
count = [0 for i in range(10**7 + 1)]

for i in range(4000):
    for j in range(1, 4000):
        k = square[i] + square[j]
        if k <= 10**7:
            count[k] += 1

print(max(count[X: Y + 1]) * 4)