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Check if a given graph is tree or not
October 20, 2014

Write a function that returns true if a given undirected graph is tree and false otherwise. For example, the following graph is a tree.

October 20, 2014

Write a function that returns true if a given undirected graph is tree and false otherwise. For example, the following graph is a tree.

October 11, 2013

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.

June 2, 2013

Given a directed graph, find out whether the graph is strongly connected or not. A directed graph is strongly connected if

May 21, 2013

A vertex in an undirected connected graph is an articulation point (or cut vertex) iff removing it (and edges through it) disconnects the graph.

May 16, 2013

A directed graph is strongly connected if there is a path between all pairs of vertices.

May 12, 2013

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 »

October 17, 2012

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 »

April 3, 2012

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 »

March 15, 2012

Depth First Traversal (or Search) for a graph is similar to Depth First Traversal of a tree. The only catch here is, unlike trees, graphs… Read More »

March 25, 2011

Depth-first search (DFS) is an algorithm (or technique) for traversing a graph.