watch lecture video

2 files changed, 9 insertions, 2 deletions

diff --git a/README.md b/README.md
index fd944b1..4f548fe 100644
--- a/README.md
+++ b/README.md
@@ -88,7 +88,7 @@ When you have completed this objective, you should be able to
 
 For supplemental material, I recommend that you watch this video (please ignore the beginning of the video talking about their course information. You can start from 17:20): 
 
-* [ ] http://freevideolectures.com/Course/1941/Introduction-to-Algorithms/1
+* [X] http://freevideolectures.com/Course/1941/Introduction-to-Algorithms/1
 
 #### Learning Objective 1.2.3 – Designing Algorithms
 
diff --git a/notes.md b/notes.md
index 7e62aae..049f92c 100644
--- a/notes.md
+++ b/notes.md
@@ -509,5 +509,12 @@ the rate of growth in determining computational efficiency for large inputs.
 
     Reduce the input size by rejecting elements or hard code an early return if some condition is satisfied.
 
+    Check for some particular input and if it receives that then returns some
+    answer. i.e. cheating. Slow algorithm that works fast on some input.
 
-## 2.3 Designing Algorithms
+[Watch](http://freevideolectures.com/Course/1941/Introduction-to-Algorithms/1)
+
+* Performance
+* User friendliness
+
+Algorithms give you a language to talk about language behaviour.