## Traverse the given directory using BFS and DFS in Java

In this post, we will see how to traverse the given directory and list out all files present in it and all its sub-directories. Get great deals at Amazon

Coding made easy

In this post, we will see how to traverse the given directory and list out all files present in it and all its sub-directories. Get great deals at Amazon

Consider a directed graph where weight of itsÂ edges can be one of x, 2x or 3x (x is a given integer), compute the least cost path from source to destination efficiently.

Given a binary tree, write an efficient algorithm to invert binary tree.

Given a Maze in the form of a rectangular matrix, filled with either O, X or M, where O represents an open cell, X represents a blocked cell and M represents landmines in the maze, we need to find shortest distance of every open cell in the maze from its nearest mine. We’re only …

Given a binary tree, print corner nodes of every level in it.

Given a binary tree, print all nodes for each diagonal having negative slope (\). Assume that the left and right child of a node makes 45 degree angle with the parent.

Given a binary tree, check if it is a complete binary tree or not.

Given a binary tree and a node in it, write an efficient algorithm to find its next node in same level as given node.

Given a binary tree, write an efficient algorithm to print left view of binary tree.

Given a perfect binary tree, write an efficient algorithm to print all nodes of it in specific order. We need to print nodes of every level in alternating left and right.

Given a binary tree, print its nodes level by level in reverse order. i.e. all nodes present at last level should be printed first followed by nodes of second-last level and so on.. All nodes for any level should be printed from left to right.

Given a binary tree, print its nodes level by level in spiral order. i.e. all nodes present at level 1 should be printed first from left to right, followed by nodes of level 2 right to left, followed by nodes of level 3 from left to right and so on.. In other words, odd levels …