Add week 11 and 12 to README

+ fix c-file names in slideshow 11

README.md

@@ -80,6 +80,19 @@ Download:
 
 <br/>
 
+Tutorial 11 - 01.02./04.02.21 - **Sorting Algorithms** <br/>
+Download:
+[Code](https://gitlab.lrz.de/dostuffthatmatters/IN8011-WS20/-/archive/main/IN8011-WS20-main.zip?path=tutorial-11) |
+[Slides](https://gitlab.lrz.de/dostuffthatmatters/IN8011-WS20/-/raw/main/slides/IN8011-T11-moritz-makowski.pdf?inline=false)
+
+<br/>
+
+Tutorial 12 - 08.02./11.02.21 - **Revision** <br/>
+Download:
+[Slides](https://gitlab.lrz.de/dostuffthatmatters/IN8011-WS20/-/raw/main/slides/IN8011-T12-moritz-makowski.pdf?inline=false)
+
+<br/>
+
 ### More Material:
 
 **Additional Exercises** (optional):

slides/src/tutorial-11/IN8011-T11-moritz-makowski.md

@@ -161,7 +161,7 @@ https://www.youtube.com/watch?v=nmhjrI-aW5o
 
 Implement a bubble sort algorithm in C.
 
-I do supply a template `exercise_12_02_bubble_sort_boilerplate.c` **but** you are free to use whichever program structure you prefer.
+I do supply a template `exercises/boilerplate/bubble_sort.c` but you are free to use whichever program structure you prefer.
 
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@@ -389,7 +389,7 @@ https://www.youtube.com/watch?v=JSceec-wEyw
 
 Implement a merge sort algorithm in C.
 
-I do supply a template `exercise_12_04_merge_sort_boilerplate.c` **but** you are free to use whichever program structure you prefer.
+I do supply a template `exercises/boilerplate/merge_sort.c` but you are free to use whichever program structure you prefer.
 
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@@ -538,7 +538,7 @@ https://www.youtube.com/watch?v=9FzT2I21F3k
 
 Implement a binary search on a standard already-sorted C-array.
 
-I do supply a template `exercise_12_05_binary_search_boilerplate.c` **but** you are free to use whichever program structure you prefer.
+I do supply a template `exercises/boilerplate/binary_search.c` but you are free to use whichever program structure you prefer.
 
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