Improve complexity definition

lectures/complexity/slides.qmd

@@ -5,19 +5,20 @@ author: "Tobias Kölling and Dominik Zobel"
 
 # Computational Complexity
 
-Investigation of resources needed for algorithms working on data structures
+**Investigation of efficiency:**
+Amount of resources needed for algorithms working on data structures
 
 
 ## Dimensions of Complexity
 
 **Time Complexity**
 
- - Time to run an algorithm
+ - Time to run an algorithm with given data size
  - Often main focus of complexity analysis
  
 **Space Complexity**
 
- - Memory required to run an algorithm
+ - Memory required to run an algorithm with given data size
 
 
 ## Big-$\mathcal{O}$ Notation