A good knowledge of data structures and algorithms is key to solving difficult problems as a programmer.
A data structures is a representation of data with a collection of associated operations [1, P. 5].
Data structures are implementations of abstract data types [1, P. 4].
An algorithm is a procedure that takes input and produces output to accomplish a specific task [2, P. 3].
An algorithm should solve a general, well-specified problem. A specification for an algorithm should include the complete set of instances it will operate on, and the algorithms output after running on one of these instances [2, P. 3].
A good algorithm is:
- Easy to implement
It’s often not possible to achieve all three aims.
-  P. Morin, Open Data Structures, 1st ed. AU Press, 2013.
-  S. Skiena, The Algorithm Design Manual, 2nd ed. Springer, 2008.