A-level Computing/AQA/Paper 1/Fundamentals of algorithms

In this unit you will see several algorithms that operate on the data structures you have seen in the previous unit.

• Graph traversal algorithms systematically visit all the vertices in a graph
• Tree traversal algorithms systematically visit all nodes in a tree
• Reverse Polish notation, an alternative way to represent arithmetic expressions, requires stacks or trees
• Searching algorithms check if a given data item exists in a data structure or not
• Sorting algorithms put a collection (typically an array) of items in ascending or descending order
• Optimisation Algorithms find the best solution to a problem, e.g. the shortest path from one graph vertex to another