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</html><description>A binary tree is one of the important data structures in computer science, where each node has at most two child nodes. Binary trees are used for various purposes such as searching, sorting, and data storage, and frequently appear in algorithm problems. In this lecture, we will solve algorithm problems utilizing binary trees. Problem: Finding &hellip; &#xB354; &#xBCF4;&#xAE30; ""</description></oembed>
