题目内容
填空题 Using the depth_first approach ,you traverse a binary tree in three sequences: ____, ____, and ____.
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填空题 There are two standard graph traversals: ____first and ____first.
填空题 The most common methods used to store a graph are the ____method and the ____method.
填空题 A stack is a linear list in which all additions and deletions are restricted to one end, called the ____. It is also called an ____list.
填空题 We define two operations for a stack:____and ____.
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