#include<bits/stdc++.h>

using namespace std;

using int64 = long long;

int main() {
  // x^2+y^2 = √R
  // (x^2+y^2)^2 = R^2
  int mp[10000001] = {};
  for(int64 x = 0; x * x <= 10000000; x++) {
    for(int64 y = 1; (x * x + y * y) <= 10000000; y++) {
      int64 v = (x * x + y * y);
      mp[v]++;
    }
  }
  int X, Y;
  cin >> X >> Y;
  int ret = 0;
  for(int i = X; i <= Y; i++) ret = max(ret, mp[i]);
  cout << ret * 4 << endl;
}