#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;

int main(){
    int x, y; cin >> x >> y;

    vector<int> sq;
    const int lim = 10000000;
    for(int i = 1; i*i <= lim; i++) sq.emplace_back(i*i);
    vector<int> dp(lim+10, 0);
    for(int i = 0; i < sq.size(); i++){
        for(int j = 0; j < sq.size(); j++){
            if(sq[i]+sq[j] <= lim) dp[sq[i]+sq[j]]++;
        }
    }
    vector<int> issq(lim+10, 0);
    for(int i = 0; i < sq.size(); i++) issq[sq[i]]++;
    int ans = 0;
    for(int i = x; i <= y; i++) ans = max(ans, dp[i]+issq[i]);
    cout << ans*4 << endl;
    return 0;
}