ll h;
inline int dt(ll x, ll y){
    int u = x*x+y*y;
    return 10000010 <= u ? 0 : u;
}
ll m[10000010],X,Y;
{
    int X,Y,best=0;
    rd(X,Y);
    REP(i,4000) REP(j,4000) m[dt(i,j)]+=4;
    REP(i,X,Y+1) best=max(best,m[i]);
    wt(best);
}