Done with garbage collection.

README.md

@@ -775,12 +775,12 @@ You'll get more graph practice in Skiena's book (see Books section below) and th
         - http://nbviewer.jupyter.org/url/norvig.com/ipython/TSP.ipynb
     - Pages 1048 - 1140 in CLRS if you have it.
 
-- [ ] **Garbage collection**
+- [x] **Garbage collection**
     - [x] Garbage collection (Java); Augmenting data str: https://www.youtube.com/watch?v=StdfeXaKGEc&list=PL-XXv-cvA_iAlnI-BQr9hjqADPBtujFJd&index=25
     - [x] Compilers: https://www.youtube.com/playlist?list=PLO9y7hOkmmSGTy5z6HZ-W4k2y8WXF7Bff
     - [x] GC in Python: https://www.youtube.com/watch?v=iHVs_HkjdmI
     - [x] Deep Dive Java: Garbage Collection is Good!: https://www.infoq.com/presentations/garbage-collection-benefits
-    - [ ] Deep Dive Python: Garbage Collection in CPython: https://www.youtube.com/watch?v=P-8Z0-MhdQs&list=PLdzf4Clw0VbOEWOS_sLhT_9zaiQDrS5AR&index=3
+    - [x] Deep Dive Python: Garbage Collection in CPython: https://www.youtube.com/watch?v=P-8Z0-MhdQs&list=PLdzf4Clw0VbOEWOS_sLhT_9zaiQDrS5AR&index=3
 
 - [ ] **Caches**
     - [ ] LRU cache: