复旦大学：《数据结构与算法设计 Data Structures and Algorithm》课程英文讲义_Chapter 03 Basic data structure - Elementary data structures

Stacks PUsh 6 top5]=2→6 15

Stacks 6 15 top[S] = 2 S PUSH 6

Stacks PUSH 2 top[s=3 2 6 15

Stacks 6 15 2 S top[S] = 3 PUSH 2

Stacks POP 2 top5]=2→6 15

Stacks 6 15 top[S] = 2 S POP 2

Stacks PUSh 5 p=3→[5 6 15

Stacks 6 15 5 S top[S] = 3 PUSH 5

Stacks Push 9 pS]=4→ 956 15

Stacks 6 15 9 5 S top[S] = 4 PUSH 9