import bisect

X,Y = map(int,input().split())
arr = []
a = 1
while a*a <= Y:
    arr.append(a*a)
    a += 1

def calc(n):
    ret = 0
    for a in arr:
        i = bisect.bisect_left(arr, n-a)
        j = bisect.bisect(arr, n-a)
        ret += j-i
    if n**0.5 == int(n**0.5):
        ret += 1
    return ret * 4

ans = 0
for n in range(X,Y+1):
    ans = max(ans, calc(n))
print(ans)