Question

Which data structure is typically implemented in the A* Algorithm?

Answer 1

An A* algorithm is a search algorithm which is mainly used for calculating the shortest path between the nodes ina graph .It is graph traversal algorithm used for calculating the shortest path between the edges .

The A Star Search algorithm is diiferent from other traversal algorithm it has “brains”. It is a smart algorithm which separates it from the other traversal algorithms.
It is worth saying that many video games , web-based applications and maps use this algorithm to calculate the shortest paths very efficiently .

Flow of A * algorithm :

A* is an search algorithm, for its best-first search, which means that it calculate and solve the problem by possible paths to the solution for the one that incurs the less cost (smallest distance travelled, short time, etc.), and among all these paths it considers the smallest that appear to lead most quickly to the solution. It is calculated in terms of weighted graphs: which starts from a node of a graph and it construct a tree of paths starting from that node with all possible combinations to expanding paths one step at a time, until one of its paths ends at the specified goal node.

Answer 2

     We can use any data structure to implement open list and closed list but for best performance, we use a set data structure of C++ STL (implemented as Red-Black Tree) and a Boolean hash table for a closed list. Also Graph.