kai=[i**2 for i in range(1001)]
d=dict()
for i in range(1000):
    for j in range(1,1000):
        d[kai[i]+kai[j]]=d.get(kai[i]+kai[j],0)+1
a,b=map(int, input().split())
ans=0
for i in range(a,b+1):
    ans=max(ans,d.get(i,0))
print(ans*4)