Bfs

Given a sorted dictionary of alien language, find the order of characters in the alien alphabet

Find shortest path between two vertices in an unweighted graph using BFS traversal

Implement breadth-first search traversal of a graph

Create a deep copy of an undirected graph represented with adjacency lists

Determine if you can finish all courses given prerequisite relationships using topological sorting

Determine if an undirected graph contains a cycle

Invert (mirror) a binary tree by swapping left and right children

Check if a graph can be colored with exactly two colors such that no two adjacent nodes have the same color

Traverse a binary tree level by level from left to right.

Find the maximum depth (height) of a binary tree

Count the number of islands in a 2D grid

Find the minimum time for all oranges to rot using BFS

Serialize a binary tree to a string and deserialize it back to the original tree

Find a linear ordering of vertices in a directed acyclic graph

Traverse a binary tree vertically and return nodes by columns

Find the shortest transformation sequence from beginWord to endWord using single character changes

Traverse a binary tree level by level in zigzag order