Depth First Traversal (or Search) for a graph is similar to Depth First Traversal (DFS) of a tree. The only catch here is, unlike trees,… Read More »
A number is called as a Jumping Number if all adjacent digits in it differ by 1. The difference between ‘9’ and ‘0’ is not… Read More »
Given a list of contacts containing username, email and phone number in any order. Identify the same contacts (i.e., same person having many different contacts)… Read More »
Given an undirected graph, print all connected components line by line. For example consider the following graph.
Given a list of word lists How to print all sentences possible taking one word from a list at a time via recursion?
Given a directed graph, a source vertex ‘s’ and a destination vertex ‘d’, print all paths from given ‘s’ to ‘d’.
Given a dictionary, a method to do lookup in dictionary and a M x N board where every cell has one character. Find all possible… Read More »
Write a function that returns true if a given undirected graph is tree and false otherwise. For example, the following graph is a tree.
Given an undirected graph, how to check if there is a cycle in the graph? For example, the following graph has a cycle 1-0-2-1.
Given a directed graph, find out whether the graph is strongly connected or not. A directed graph is strongly connected if
A vertex in an undirected connected graph is an articulation point (or cut vertex) iff removing it (and edges through it) disconnects the graph.
A directed graph is strongly connected if there is a path between all pairs of vertices.
Topological sorting for Directed Acyclic Graph (DAG) is a linear ordering of vertices such that for every directed edge uv, vertex u comes before v… Read More »
Given a boolean 2D matrix, find the number of islands. A group of connected 1s forms an island. For example, the below matrix contains 5… Read More »
Given a directed graph, check whether the graph contains a cycle or not. Your function should return true if the given graph contains at least… Read More »