x,y = map(int,input().split())

ans = 0
dp = [0]*(y+1)

Y = int(y**0.5+50)
for i in range(1,Y+1):
    tmp = i**2
    for j in range(1,Y+1):
        idx = tmp+j**2
        if idx > y:
            break
        dp[idx] += 1
#print(dp)
print(max(dp[x:y+1])*4)