#include<iostream>
#include<algorithm>
using namespace std;
int x,y,cnt[10000001];
main()
{
	cin>>x>>y;
	for(int i=0;i*i<=1e7;i++)
	{
		for(int j=0;i*i+j*j<=1e7;j++)cnt[i*i+j*j]+=(i?2:1)*(j?2:1);
	}
	int ans=0;
	for(;x<=y;x++)ans=max(ans,cnt[x]);
	cout<<ans<<endl;
}