posts: union-find: add 'union'

content/posts/2024-06-24-union-find/index.md

@@ -10,18 +10,18 @@ tags:
 categories:
   - programming
 series:
-  - Lesser known algorithms and data structures
+  - Cool algorithms
 favorite: false
 disable_feed: false
 ---
 
-To kickoff the [series] of posts about criminally underrated algorithms and data
-structures, I will be talking about my favorite one: the [_Disjoint Set_][wiki].
-Also known as the _Union-Find_ data structure, so named because of its two main
-operations: `ds.union(lhs, rhs)` and `ds.find(elem)`.
+To kickoff the [series]({{< ref "/series/cool-algorithms/">}}) of posts about
+algorithms and data structures I find interesting, I will be talking about my
+favorite one: the [_Disjoint Set_][wiki]. Also known as the _Union-Find_ data
+structure, so named because of its two main operations: `ds.union(lhs, rhs)` and
+`ds.find(elem)`.
 
 [wiki]: https://en.wikipedia.org/wiki/Disjoint-set_data_structure
-[series]: {{< ref "/series/lesser-known-algorithms-and-data-structures/">}}
 
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