#include <bits/stdc++.h>

using namespace std;
using ll = long long;

int main(){
    cin.tie(nullptr);
    ios_base::sync_with_stdio(false);

    ll x, y, m=1e7, ans=0;
    cin >> x >> y;
    m = sqrt(m)+1;
    vector<ll> cnt(3e7);
    for (int i=-m; i<=m; ++i){
        for (int j=-m; j<=m; ++j) cnt[i*i+j*j]++;
    }

    for (int i=x; i<=y; i++) ans = max(ans, cnt[i]);

    cout << ans << endl;

    return 0;
}