x, y = map(int, input().split())
num = [0]*(10**7+1)
for a in range(3164):
    for b in range(1, 3164):
        if a**2 + b**2 > 10**7:
            break
        num[a**2+b**2] += 1

print(max(num[x:y+1])*4)