Depth First Search and Iterative deepening search: Depth First Search (DFS), is the algorithm to traverse or search tree or graph data structures. The search starts with the root node, and then explores as far as possible along each branch before backtracking. In iterative deepening search, a depth limited version of the depth –first search is run repeatedly with increasing depth limits until goal is found.

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A useful operation in databases is the naturalj oin.If we view a database as a list of ordered pairs of objects, then the natural join of databases A and B is the list of all ordered triples (x,y,z) such that the pair (x,y) is in A and the pair (y,z) is in B. Describe and analyze an efficient algorithm for computing the natural join of a list A of n pairs and a list B of m pairs. Data Structures & Algorithms C-7.55

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Chapter 3, Problem 18E

Program Plan Intro

Depth First Search and Iterative deepening search:

Depth First Search (DFS), is the algorithm to traverse or search tree or graph data structures.

The search starts with the root node, and then explores as far as possible along each branch before backtracking.

In iterative deepening search, a depth limited version of the depth –first search is run repeatedly with increasing depth limits until goal is found.

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