{"id":34858,"date":"2024-11-01T09:32:48","date_gmt":"2024-11-01T09:32:48","guid":{"rendered":"http:\/\/atmokpo.com\/w\/?p=34858"},"modified":"2024-11-01T11:26:13","modified_gmt":"2024-11-01T11:26:13","slug":"swift-coding-test-course-finding-the-lowest-common-ancestor-1","status":"publish","type":"post","link":"https:\/\/atmokpo.com\/w\/34858\/","title":{"rendered":"Swift Coding Test Course, Finding the Lowest Common Ancestor 1"},"content":{"rendered":"<p>\n    Coding tests are a very important process for software developers. In particular, algorithm problems provide a good opportunity to demonstrate your problem-solving skills. In this course, we will cover the problem of finding the Lowest Common Ancestor (LCA) in a tree structure.\n<\/p>\n<h2>Problem Description<\/h2>\n<p>\n    In the given binary tree, the Lowest Common Ancestor (LCA) of two nodes A and B is the deepest node among the ancestors of nodes A and B. In other words, you need to find the nearest common ancestor along the paths of A and B.\n<\/p>\n<p>\n<strong>Problem:<\/strong> Given a binary tree, write a function that takes the values of two nodes A and B and returns the Lowest Common Ancestor.\n<\/p>\n<h3>Input<\/h3>\n<ul>\n<li>The root node of the binary tree is given.<\/li>\n<li>The values of nodes A and B are provided.<\/li>\n<\/ul>\n<h3>Output<\/h3>\n<ul>\n<li>Returns the value of the Lowest Common Ancestor node.<\/li>\n<\/ul>\n<h3>Constraints<\/h3>\n<ul>\n<li>The nodes in the binary tree are unique.<\/li>\n<li>Nodes always exist, and A and B must be included in the tree.<\/li>\n<\/ul>\n<h2>Algorithm Approach<\/h2>\n<p>\n    To find the Lowest Common Ancestor, it is necessary to traverse the tree. A depth-first search (DFS) approach is used to recursively explore until each node is reached. The method to find A and B at each node is as follows.\n<\/p>\n<ul>\n<li>Examine the root node to see if it matches A or B.<\/li>\n<li>If the current node is null, return null.<\/li>\n<li>Recursively check the left child and the right child, and examine the results of both child calls.<\/li>\n<li>If both child calls return non-null results, the current node is the Lowest Common Ancestor.<\/li>\n<li>If only one child is non-null, that child is the Lowest Common Ancestor.<\/li>\n<\/ul>\n<h2>Swift Implementation<\/h2>\n","protected":false},"excerpt":{"rendered":"<p>Coding tests are a very important process for software developers. In particular, algorithm problems provide a good opportunity to demonstrate your problem-solving skills. In this course, we will cover the problem of finding the Lowest Common Ancestor (LCA) in a tree structure. Problem Description In the given binary tree, the Lowest Common Ancestor (LCA) of &hellip; <a href=\"https:\/\/atmokpo.com\/w\/34858\/\" class=\"more-link\">\ub354 \ubcf4\uae30<span class=\"screen-reader-text\"> &#8220;Swift Coding Test Course, Finding the Lowest Common Ancestor 1&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[129],"tags":[],"class_list":["post-34858","post","type-post","status-publish","format-standard","hentry","category-swift-coding-test"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Swift Coding Test Course, Finding the Lowest Common Ancestor 1 - \ub77c\uc774\ube0c\uc2a4\ub9c8\ud2b8<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/atmokpo.com\/w\/34858\/\" \/>\n<meta property=\"og:locale\" content=\"ko_KR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Swift Coding Test Course, Finding the Lowest Common Ancestor 1 - \ub77c\uc774\ube0c\uc2a4\ub9c8\ud2b8\" \/>\n<meta property=\"og:description\" content=\"Coding tests are a very important process for software developers. 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