BFS

• Open the Lock (BFS)
• Walls and Gates (multi-source BFS,)
• Rotting Oranges
• Snake and Ladders
• Minimum Genetic Mutation
• Word Ladder

Stack

• Min Stack

Tree

• Binary Tree Level Order Traversal
• Lowest Common Ancestor of a Binary Tree

Interval / PQ

• Meeting Rooms
• Meeting Rooms II
• Meeting Rooms III