#include <stdio.h>
#include <atcoder/all>
#include <bits/stdc++.h>
using namespace std;
using namespace atcoder;
using mint = modint998244353;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf 1000000000

int cnt[10000005];

int main() {
    
	for(int i=-4000;i<=4000;i++){
		for(int j=-4000;j<=4000;j++){
			int r = i*i + j*j;
			if(r>10000000)continue;
			cnt[r]++;
		}
	}
	int x,y;
	cin>>x>>y;
	int ans = 0;
	for(int i=x;i<=y;i++)ans = max(ans,cnt[i]);
	
	cout<<ans<<endl;
	
    return 0;
}