Basic Concepts
--------------
abstract_classes
callbacks
conditionals
events
equality
exception_handling
generics
inheritance
interfaces
loops
operator_overloading
pattern_matching
polymorphism
recursion
threading
type_conversion
variables

Data Types
----------
arrays
booleans
classes
dates
discriminated_unions
enumerations
floating_point_numbers
graphs
integers
lists
maps
matrices
optional_values
queues
records
sequences
sets
stacks
strings
structs
time
trees
tuples

Problem Areas
-------------
algorithms
bitwise_operations
concurrency
cryptography
domain_specific_languages
files
filtering
games
globalization
logic
math
memory_management
networking
parallelism
parsing
pattern_recognition
performance
randomness
refactoring
regular_expressions
searching
security
sorting
text_formatting
transforming

Programming Style
-----------------
behavior_driven_development
functional_programming
object_oriented_programming
reactive_programming
test_driven_development

Basic Concepts
--------------
abstract_classes
callbacks
conditionals
events
equality
exception_handling
generics
inheritance
interfaces
loops
operator_overloading
pattern_matching
polymorphism
recursion
threading
type_conversion
variables

Data Types
----------
arrays
booleans
classes
dates
discriminated_unions
enumerations
floating_point_numbers
graphs
integers
lists
maps
matrices
optional_values
queues
records
sequences
sets
stacks
strings
structs
time
trees
tuples

Problem Areas
-------------
algorithms
bitwise_operations
concurrency
cryptography
data_structures
domain_specific_languages
files
filtering
games
globalization
logic
math
memory_management
networking
parallelism
parsing
pattern_recognition
performance
randomness
refactoring
regular_expressions
searching
security
sorting
text_formatting
transforming

Programming Style
-----------------
behavior_driven_development
functional_programming
object_oriented_programming
reactive_programming
test_driven_development

Add data structures to topic list
Add data structures to topic list

We have a number of exercises that are about data structures, but
the topic was missing.
