It's not at all important to get it right the first time. It's vitally important to get it right the last time. Andrew Hunt and David Thomas
Depth-first recursive search in a tree
Algorithm Problem Description
Graph and tree nodes can be traversed using the backtracking technique. Depth-first search (DFS) is an algorithm for traversing or searching tree or graph data structures. DFS takes less memory compare than Breadth-first search and not necessary to store all of the child pointers at each level.
DFS technique used in web-crawling, Finding connected components, Topological sorting, Finding the bridges of a graph, Finding strongly connected components, Solving puzzles with only one solution, such as mazes, maze generation may use a randomized depth-first search, Finding connectivity in graphs.
Output
Visits from source to destination using DFS: A->B->C->D->E
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