Letter Combinations of a Phone Number

In this article, we have disccussed two approaches (recursive + iterative) to solve the problem "Letter Combinations of a Phone Number" in C++ language with explanation of Time and Space complexity.

Table of contents:

1.Explanation of the problem

2.Recursive approach discussion

Approach discussionAlgorithm walkthroughImplementation of recursive codeTime and space complexity

3.Iterative approach discussion

Approach discussionAlgorithm walkthroughImplementation of Iterative codeTime and s...