int calc(int r){
    int ans = 0;
    int high = floor(sqrt(r));
    REP(x, high){
        int y, yy;
        yy = r-x*x;
        y = floor(sqrt(yy));
        ans += (y*y == yy);
    }
    return ans*4;
}

{
    int x,y,best=0;
    rd(x,y);
    REP(i,x,y+1) best = max(best, calc(i));
    wt(best);
}