#include<bits/stdc++.h>
using namespace std;
using Int = long long;
template<typename T1,typename T2> inline void chmin(T1 &a,T2 b){if(a>b) a=b;}
template<typename T1,typename T2> inline void chmax(T1 &a,T2 b){if(a<b) a=b;}

//INSERT ABOVE HERE
signed main(){
  Int x,y;
  cin>>x>>y;

  const Int MAX = 1e7+100;
  using P = pair<Int, Int>;
  vector<vector<P> > sp(MAX);
  
  for(Int i=0;i*i<=y;i++){
    for(Int j=0;j<i;j++){
      if(i*i+j*j>=MAX) continue;
      sp[i*i+j*j].emplace_back(i,j);
    }
  }  

  Int ans=0;
  for(Int i=x;i<=y;i++){
    chmax(ans,(Int)sp[i].size()*4);
  }
  cout<<ans<<endl;
  return 0;
}