using System;
using static System.Console;
using System.Linq;
using System.Collections.Generic;

class Program
{
    static int NN => int.Parse(ReadLine());
    static int[] NList => ReadLine().Split().Select(int.Parse).ToArray();
    static int[][] NArr(long n) => Enumerable.Repeat(0, (int)n).Select(_ => NList).ToArray();
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var c = NList;
        var (l, r) = (c[0], c[1]);
        var ans = new int[r + 1];
        for (var x = 0; x * x <= r; ++x) for (var y = 1; x * x + y * y <= r; ++y) ans[x * x + y * y] += 4;
        WriteLine(ans[l..(r+1)].Max());
    }
}