update bars

Author: jess-lemur

_navbar.md

@@ -5,6 +5,8 @@
     - [Algorithm Analysis](https://docs.google.com/presentation/d/195VG9kyXou_jL1VX7w9R5dOJ76p0rek1jYqrWEnBf70/edit#slide=id.ga55ca9f4ae_0_83)
     - [Recursion and Search Algorithms](https://docs.google.com/presentation/d/1qFDn7pWKxkHc1PWInQVxSGudzAbHuQDiXE2onEMxMQA/edit#slide=id.g9f11f32373_1_0)
     - [Stacks and Queues](https://docs.google.com/presentation/d/1BdJaPgwYzBEbFw1tc_e8srf3lIotlcTQyB64IRMNsfc/edit#slide=id.ga76237554e_0_63)
+    - [Hash Tables](https://docs.google.com/presentation/d/1WDzrB3fF68I8B5Zi54LwPXvd_sGlq4SXyXDuwT2IPY8/edit#slide=id.ga99f0fc9c3_1_102)
+    - [Trees](https://docs.google.com/presentation/d/16tCYlSxXg-b6ntPl1FllD-Oi7vDtqB9XVFuSQLOxwHc/edit#slide=id.gac88f69591_0_397)
 
 - **Assignments**
     - [Playlist](Lessons/playlist.md)

_sidebar.md

@@ -3,6 +3,9 @@
     - [Algorithm Analysis](https://docs.google.com/presentation/d/195VG9kyXou_jL1VX7w9R5dOJ76p0rek1jYqrWEnBf70/edit#slide=id.ga55ca9f4ae_0_83)
     - [Recursion and Search Algorithms](https://docs.google.com/presentation/d/1qFDn7pWKxkHc1PWInQVxSGudzAbHuQDiXE2onEMxMQA/edit#slide=id.g9f11f32373_1_0)
     - [Stacks and Queues](https://docs.google.com/presentation/d/1BdJaPgwYzBEbFw1tc_e8srf3lIotlcTQyB64IRMNsfc/edit#slide=id.ga76237554e_0_63)
+    - [Hash Tables](https://docs.google.com/presentation/d/1WDzrB3fF68I8B5Zi54LwPXvd_sGlq4SXyXDuwT2IPY8/edit#slide=id.ga99f0fc9c3_1_102)
+    - [Trees](https://docs.google.com/presentation/d/16tCYlSxXg-b6ntPl1FllD-Oi7vDtqB9XVFuSQLOxwHc/edit#slide=id.gac88f69591_0_397)
+
 
 
 - **Assignments**