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---
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comments: true
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icon: material/stack-overflow
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---
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# Chapter 5. Stack and queue
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{ class="cover-image" }
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!!! abstract
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A stack is like cats placed on top of each other, while a queue is like cats lined up one by one.
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They represent the logical relationships of Last-In-First-Out (LIFO) and First-In-First-Out (FIFO), respectively.
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## Chapter contents
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- [5.1 Stack](stack.md)
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- [5.2 Queue](queue.md)
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- [5.3 Double-ended queue](deque.md)
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- [5.4 Summary](summary.md)
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