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contents/algorithms/stack.md
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<head>
<meta property="og:image" content="https://www.techinterviewhandbook.org/social/algorithms/algorithms/algorithms-stack.png" />
</head>
## Introduction
A a stack is an abstract data type that supports the operations **push** (insert a new element on the top of the stack) and **pop** (remove and return the most recently added element, the element at the top of the stack). As an abstract data type, stacks can be implemented using arrays or singly linked lists.