#include <cstdio>
#include <iostream>
#include <string>
#include <sstream>
#include <stack>
#include <algorithm>
#include <cmath>
#include <queue>
#include <map>
#include <set>
#include <cstdlib>
#include <bitset>
#include <tuple>
#include <assert.h>
#include <deque>
#include <bitset>
#include <iomanip>
#include <limits>
#include <chrono>
#include <random>
#include <array>
#include <unordered_map>
#include <functional>
#include <complex>

template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; }

const long long MAX = 5100000;
const long long INF = 1LL << 60;
const long long mod = 1000000007LL;
//const long long mod = 998244353LL;

using namespace std;
typedef unsigned long long ull;
typedef long long ll;


int main()
{
	/*
	cin.tie(nullptr);
	ios::sync_with_stdio(false);
	*/
	ll X, Y; scanf("%lld %lld", &X, &Y);
	vector<ll> h;
	for (ll i = 1; i * i <= 10005000; i++) {
		h.push_back(i * i);
	}
	ll res = 0;
	for (ll r = X; r <= Y; r++) {
		ll tmp = 0;
		for (ll x = 0; x * x < r; x++) {
			ll y = r - x * x;
			if (binary_search(h.begin(), h.end(), y)) tmp += 4;
		}
		chmax(res, tmp);
	}
	cout << res << endl;
	return 0;
}