/* -*- coding: utf-8 -*-
 *
 * 781.cc:  No.781 円周上の格子点の数え上げ - yukicoder
 */

#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<cmath>
#include<iostream>
#include<string>
#include<vector>
#include<map>
#include<set>
#include<stack>
#include<list>
#include<queue>
#include<deque>
#include<algorithm>
#include<numeric>
#include<utility>
#include<complex>
#include<functional>
 
using namespace std;

/* constant */

const int MAX_R = 10000000;

/* typedef */

/* global variables */

int cnts[MAX_R + 1];

/* subroutines */

/* main */

int main() {
  int r0, r1;
  scanf("%d%d", &r0, &r1);

  for (int y = 0, yy = 0; yy <= r1; y++, yy = y * y)
    for (int x = 1, xx = 1; xx + yy <= r1; x++, xx = x * x)
      cnts[xx + yy]++;

  int maxc = 0;
  for (int r = r0; r <= r1; r++)
    if (maxc < cnts[r]) maxc = cnts[r];

  printf("%d\n", maxc * 4);
  return 0;
}