Re: URLs in rbtree.c are broken

> On 10 Oct 2025, at 09:00, Chao Li <li.evan.chao@gmail.com> wrote:

> For the first one, by search for “Thomas Niemann’s Sorting and Searching Algorithms: a Cookbook”, I got
https://www.epaperpress.com/sortsearch/rbt.html,but I am not sure it provides the exactly same content as the old URL. 

The entire algolist.manual.ru site is not available in DNS, but according to
archive.org it was responsinding quite recently.  Perhaps we should give that a
little time before we do anything?

> For the second one, I cannot find a replacement.

This link has been dead for over a decade by the looks of it, and noone has
complained.  However, since this refers to license terms it would be best
replace with an archive.org link here:

  https://web.archive.org/web/20131202103513/http://www.cs.auckland.ac.nz/software/AlgAnim/niemann/s_man.htm

--
Daniel Gustafsson