Essential Algorithms and Data Structures (Second Edition)
Algorithms, Big O notation and pseudocode are aspects of A Level study that students often struggle with. Many online sources go into too much detail with overly complex coded solutions, while textbooks often lack the depth students need. This book explains all the algorithms required by the major English and Welsh examination boards in detail.
Each algorithm or data structure includes:
Description in plain English
Source code in Python, plus downloadable source code in Visual Basic and C#
Space and time complexity explanation using Big O notation