Introduction

Data structure:
1. ways to organize and store data
2. ways to access and manipulate the stored data

Why do we use data structure?
- data structures lead to efficient algorithm.

Stack: LILO(Last-In-Last-Out)
Queue: FIFO
List: Position - before & after. Can insert/remove/access from arbitrary elements.
Tree: Hierarchical.
Priority Queue: Prioritized elements. removeMin, insert.
Graph: connection, relationship (not only physical, but also logical relationship)



Q: What is stack, queue, list, tree, priority queue, graph?