import math
a,b = map(int,input().split())
cnt = [0] * 10000010
r = int(math.sqrt(b))
for i in range(1,r+1):
	for j in range(r+1):
		if i*i + j*j <= b:
			cnt[i*i + j*j]+=1
ans = 0
for i in range(a,b+1):
	ans = max(ans, cnt[i])
print (4*ans)