{"id":28017,"date":"2024-10-27T15:21:01","date_gmt":"2024-10-27T15:21:01","guid":{"rendered":"http:\/\/atmokpo.com\/w\/?p=28017"},"modified":"2024-11-26T07:11:48","modified_gmt":"2024-11-26T07:11:48","slug":"%ec%9e%90%eb%b0%94%ec%8a%a4%ed%81%ac%eb%a6%bd%ed%8a%b8-%ec%bd%94%eb%94%a9%ed%85%8c%ec%8a%a4%ed%8a%b8-%ea%b0%95%ec%a2%8c-%ec%9c%a0%eb%8b%88%ec%98%a8-%ed%8c%8c%ec%9d%b8%eb%93%9c","status":"publish","type":"post","link":"https:\/\/atmokpo.com\/w\/28017\/","title":{"rendered":"\uc790\ubc14\uc2a4\ud06c\ub9bd\ud2b8 \ucf54\ub529\ud14c\uc2a4\ud2b8 \uac15\uc88c, \uc720\ub2c8\uc628 \ud30c\uc778\ub4dc"},"content":{"rendered":"<article>\n<p>\uc548\ub155\ud558\uc138\uc694! \uc774\ubc88 \uc2dc\uac04\uc5d0\ub294 \ucf54\ub529\ud14c\uc2a4\ud2b8\uc5d0\uc11c \uc790\uc8fc \ub4f1\uc7a5\ud558\ub294 \uc54c\uace0\ub9ac\uc998 \uc911 \ud558\ub098\uc778 <strong>\uc720\ub2c8\uc628 \ud30c\uc778\ub4dc(Union-Find)<\/strong>\uc5d0 \ub300\ud574\uc11c \uc54c\uc544\ubcf4\uaca0\uc2b5\ub2c8\ub2e4. \uc774 \uc54c\uace0\ub9ac\uc998\uc740 \uadf8\ub798\ud504\uc758 \uc5f0\uacb0 \uc131\ubd84\uc744 \ucc3e\uac70\ub098, \uc9d1\ud569\uc744 \uad00\ub9ac\ud558\ub294 \ub370 \uc720\uc6a9\ud558\uba70, \ub2e4\uc591\ud55c \ubb38\uc81c \ud574\uacb0\uc5d0 \ud65c\uc6a9\ub429\ub2c8\ub2e4. \uc2dc\uc791\ud558\uae30 \uc804\uc5d0 \uc720\ub2c8\uc628 \ud30c\uc778\ub4dc\uc758 \uae30\ubcf8 \uac1c\ub150\uc744 \uc774\ud574\ud558\uace0, \uc2e4\uc81c \ubb38\uc81c\ud480\uc774 \uacfc\uc815\uc744 \ud1b5\ud574 \uad6c\uccb4\uc801\uc778 \ud65c\uc6a9 \ubc29\ubc95\uc744 \ubc30\uc6cc\ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n<h2>\uc720\ub2c8\uc628 \ud30c\uc778\ub4dc\ub780?<\/h2>\n<p>\uc720\ub2c8\uc628 \ud30c\uc778\ub4dc\ub294 \uc8fc\uc5b4\uc9c4 \uc6d0\uc18c\ub4e4\uc774 \uc5b4\ub5a4 \uc5f0\uacb0\ub41c \uc9d1\ud569\ub4e4\ub85c \ub098\ub204\uc5b4\uc838 \uc788\ub294\uc9c0\ub97c \ucd94\uc801\ud560 \uc218 \uc788\ub294 \ub370\uc774\ud130 \uad6c\uc870\uc785\ub2c8\ub2e4. \ub2e4\uc74c\uc758 \ub450 \uac00\uc9c0 \uc5f0\uc0b0\uc744 \uc81c\uacf5\ud569\ub2c8\ub2e4:<\/p>\n<ul>\n<li><strong>Find<\/strong>: \uc8fc\uc5b4\uc9c4 \uc6d0\uc18c\uac00 \uc5b4\ub5a4 \uc9d1\ud569\uc5d0 \uc18d\ud558\ub294\uc9c0\ub97c \ucc3e\ub294 \uc5f0\uc0b0.<\/li>\n<li><strong>Union<\/strong>: \ub450 \uac1c\uc758 \uc9d1\ud569\uc744 \ud569\uce58\ub294 \uc5f0\uc0b0.<\/li>\n<\/ul>\n<p>\uc774 \uc790\ub8cc\uad6c\uc870\ub294 \uadf8\ub798\ud504\uc758 \uc5f0\uacb0 \uc131\ubd84\uc744 \ucc3e\ub294 \ub370 \uc720\uc6a9\ud558\uba70, \uc0ac\uc774\ud074 \uc5ec\ubd80\ub97c \ud310\ub2e8\ud560 \ub54c\ub3c4 \uc790\uc8fc \uc0ac\uc6a9\ub429\ub2c8\ub2e4. \uc720\ub2c8\uc628 \ud30c\uc778\ub4dc\ub294 \ucd5c\uc801\ud654 \uae30\ubc95\uc744 \uc0ac\uc6a9\ud558\uc5ec \ub9e4\uc6b0 \ube60\ub978 \uc218\ud589 \uc2dc\uac04\uc744 \uc790\ub791\ud569\ub2c8\ub2e4.<\/p>\n<h2>\ubb38\uc81c \uc124\uba85<\/h2>\n<p>\uc774\uc81c \uc720\ub2c8\uc628 \ud30c\uc778\ub4dc\ub97c \uc801\uc6a9\ud574\ubcfc \uc218 \uc788\ub294 \ubb38\uc81c\ub97c \uc18c\uac1c\ud558\uaca0\uc2b5\ub2c8\ub2e4. \ub2e4\uc74c\uacfc \uac19\uc740 \ubb38\uc81c\uac00 \uc788\uc2b5\ub2c8\ub2e4:<\/p>\n<blockquote>\n<h3>\ubb38\uc81c: \uce5c\uad6c \ucc3e\uae30<\/h3>\n<p>n\uba85\uc758 \uc0ac\ub78c\ub4e4\uc774 \uc788\ub2e4. \uac01 \uc0ac\ub78c\uc740 \uce5c\uad6c\ub97c \uc0ac\uadc8 \uc218 \uc788\uc73c\uba70, \uce5c\uad6c \uad00\uacc4\ub294 \uc11c\ub85c\uc5d0\uac8c \uc5f0\uacb0\ub418\uc5b4 \uc788\ub2e4. \uc8fc\uc5b4\uc9c4 \uce5c\uad6c \uad00\uacc4\uc758 \ubaa9\ub85d\uc5d0\uc11c \uc11c\ub85c \uce5c\uad6c\uc778\uc9c0 \uc5ec\ubd80\ub97c \ud310\ub2e8\ud560 \uc218 \uc788\ub294 \uc54c\uace0\ub9ac\uc998\uc744 \uc791\uc131\ud558\uc2dc\uc624. \uce5c\uad6c \uad00\uacc4\ub294 \ub2e4\uc74c \ud615\uc2dd\uc73c\ub85c \uc8fc\uc5b4\uc9c4\ub2e4:<\/p>\n<pre>\n        [[1, 2], [2, 3], [4, 5]]\n        <\/pre>\n<p>\uc704 \uc608\uc2dc\uc5d0\uc11c\ub294 1\uacfc 2\uac00 \uce5c\uad6c\uc774\uace0, 2\uc640 3\uc774 \uce5c\uad6c\uc774\ubbc0\ub85c, 1\uacfc 3\uc740 \uac04\uc811\uc801\uc73c\ub85c \uce5c\uad6c\uc785\ub2c8\ub2e4. 4\uc640 5\ub294 \ubcc4\uac1c\uc758 \uce5c\uad6c \uad00\uacc4\uc774\ub2c8 1\uacfc 4\ub294 \uce5c\uad6c\uac00 \uc544\ub2d9\ub2c8\ub2e4. \uac01 \ucffc\ub9ac\uc5d0 \ub300\ud574 \ub450 \uc0ac\ub78c\uc774 \uce5c\uad6c\uc778\uc9c0 \ud655\uc778\ud558\uc2dc\uc624.<\/p>\n<\/blockquote>\n<h2>\uc720\ub2c8\uc628 \ud30c\uc778\ub4dc \uc54c\uace0\ub9ac\uc998 \uad6c\ud604<\/h2>\n<p>\uc774\uc81c \uc774 \ubb38\uc81c\ub97c \uc720\ub2c8\uc628 \ud30c\uc778\ub4dc \uc54c\uace0\ub9ac\uc998\uc73c\ub85c \ud574\uacb0\ud558\ub294 \ubc29\ubc95\uc744 \uc0b4\ud3b4\ubcf4\uaca0\uc2b5\ub2c8\ub2e4. \uba3c\uc800, \uc720\ub2c8\uc628 \ud30c\uc778\ub4dc \uad6c\uc870\uccb4\ub97c \uc815\uc758\ud558\uace0 \uadf8 \uc548\uc5d0 \ud544\uc694\ud55c \ud568\uc218\ub97c \uad6c\ud604\ud558\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n<pre><code>\n    class UnionFind {\n        constructor(size) {\n            this.parent = new Array(size);\n            this.rank = new Array(size).fill(1);\n            for (let i = 0; i &lt; size; i++) {\n                this.parent[i] = i;\n            }\n        }\n\n        find(x) {\n            if (this.parent[x] !== x) {\n                this.parent[x] = this.find(this.parent[x]); \/\/ Path compression\n            }\n            return this.parent[x];\n        }\n\n        union(x, y) {\n            const rootX = this.find(x);\n            const rootY = this.find(y);\n\n            if (rootX !== rootY) {\n                \/\/ Union by rank\n                if (this.rank[rootX] &gt; this.rank[rootY]) {\n                    this.parent[rootY] = rootX;\n                } else if (this.rank[rootX] &lt; this.rank[rootY]) {\n                    this.parent[rootX] = rootY;\n                } else {\n                    this.parent[rootY] = rootX;\n                    this.rank[rootX]++;\n                }\n            }\n        }\n\n        areConnected(x, y) {\n            return this.find(x) === this.find(y);\n        }\n    }\n    <\/code><\/pre>\n<h2>\ubb38\uc81c \ud574\uacb0 \uacfc\uc815<\/h2>\n<p>1. \ubb38\uc81c\uc758 \uc785\ub825\uc744 \ucc98\ub9ac\ud569\ub2c8\ub2e4. \uce5c\uad6c \uad00\uacc4\ub97c \uc785\ub825\ubc1b\uace0, \uc57d\uc18d\ub41c \ucffc\ub9ac\ub97c \uc218\ud589\ud560 \ub300\uc0c1\uc744 \uac00\uc838\uc635\ub2c8\ub2e4.<\/p>\n<pre><code>\n    function processFriendships(friendships, queries, numberOfPeople) {\n        const uf = new UnionFind(numberOfPeople + 1); \/\/ +1 to accommodate 1-indexed people\n        \n        friendships.forEach(([a, b]) =&gt; {\n            uf.union(a, b);\n        });\n\n        return queries.map(([x, y]) =&gt; uf.areConnected(x, y));\n    }\n    <\/code><\/pre>\n<p>2. \uce5c\uad6c \uad00\uacc4 \ubaa9\ub85d\uc744 \ubc18\ubcf5\ud558\uc5ec \uac01 \uc30d\uc5d0 \ub300\ud574 \uc720\ub2c8\uc628 \uc5f0\uc0b0\uc744 \uc218\ud589\ud569\ub2c8\ub2e4.<\/p>\n<p>3. \uac01 \ucffc\ub9ac\uc5d0 \ub300\ud574 \ub450 \uc0ac\ub78c\uc774 \uac19\uc740 \uc9d1\ud569\uc5d0 \uc18d\ud558\ub294\uc9c0 \uc5ec\ubd80\ub97c \ud310\ub2e8\ud569\ub2c8\ub2e4.<\/p>\n<h2>\ucd5c\uc885 \ucf54\ub4dc<\/h2>\n<pre><code>\n    const friendships = [[1, 2], [2, 3], [4, 5]];\n    const queries = [[1, 3], [1, 4], [4, 5]];\n    const numberOfPeople = 5;\n\n    const results = processFriendships(friendships, queries, numberOfPeople);\n    console.log(results); \/\/ [true, false, true]\n    <\/code><\/pre>\n<h2>\uacb0\uacfc \ud574\uc11d<\/h2>\n<p>\ucd5c\uc885\uc801\uc73c\ub85c \ucffc\ub9ac \uacb0\uacfc\ub294 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4:<\/p>\n<ul>\n<li><strong>1\uacfc 3\uc740 \uce5c\uad6c\uc774\ub2e4<\/strong>: true<\/li>\n<li><strong>1\uacfc 4\ub294 \uce5c\uad6c\uac00 \uc544\ub2c8\ub2e4<\/strong>: false<\/li>\n<li><strong>4\uc640 5\ub294 \uce5c\uad6c\uc774\ub2e4<\/strong>: true<\/li>\n<\/ul>\n<p>\uc704 \ucf54\ub4dc\ub294 \uc720\ub2c8\uc628 \ud30c\uc778\ub4dc\ub97c \ud1b5\ud574 \ud6a8\uc728\uc801\uc73c\ub85c \uce5c\uad6c \uad00\uacc4\ub97c \ucc98\ub9ac\ud588\uc2b5\ub2c8\ub2e4. \uc720\ub2c8\uc628 \ud30c\uc778\ub4dc\ub294 \ud2b9\ud788 \ub9ce\uc740 \uc218\uc758 \uc9d1\ud569\uc774 \uc788\uc744 \ub54c \uadf8 \uc720\uc6a9\uc131\uc744 \ubc1c\ud718\ud558\uba70, \uc2dc\uac04 \ubcf5\uc7a1\ub3c4\ub294 \uac70\uc758 \uc0c1\uc218 \uc2dc\uac04\uc785\ub2c8\ub2e4.<\/p>\n<h2>\ub9c8\ubb34\ub9ac<\/h2>\n<p>\uc774\ubc88 \uac15\uc88c\uc5d0\uc11c\ub294 \uc720\ub2c8\uc628 \ud30c\uc778\ub4dc \uc54c\uace0\ub9ac\uc998\uc744 \ud1b5\ud574 \uce5c\uad6c \ucc3e\uae30 \ubb38\uc81c\ub97c \ud574\uacb0\ud588\uc2b5\ub2c8\ub2e4. \uc720\ub2c8\uc628 \ud30c\uc778\ub4dc\ub294 \ub2e4\uc591\ud55c \ubb38\uc81c\uc5d0 \ud65c\uc6a9\ub420 \uc218 \uc788\uc73c\uba70, \uc54c\uace0\ub9ac\uc998 \ubb38\uc81c\ub97c \ud574\uacb0\ud558\ub294 \ub370 \ub9e4\uc6b0 \uc720\uc6a9\ud55c \ub3c4\uad6c\uc785\ub2c8\ub2e4. \uacc4\uc18d\ud574\uc11c \ub2e4\uc591\ud55c \uc54c\uace0\ub9ac\uc998\ub4e4\uc744 \ud559\uc2b5\ud558\uace0 \uc5f0\uc2b5\ud558\uc5ec \ucf54\ub529 \ud14c\uc2a4\ud2b8\uc5d0\uc11c \uc88b\uc740 \uacb0\uacfc\ub97c \uc5bb\uc73c\uc2dc\uae38 \ubc14\ub78d\ub2c8\ub2e4!<\/p>\n<p>\uac10\uc0ac\ud569\ub2c8\ub2e4!<\/p>\n<\/article>\n","protected":false},"excerpt":{"rendered":"<p>\uc548\ub155\ud558\uc138\uc694! \uc774\ubc88 \uc2dc\uac04\uc5d0\ub294 \ucf54\ub529\ud14c\uc2a4\ud2b8\uc5d0\uc11c \uc790\uc8fc \ub4f1\uc7a5\ud558\ub294 \uc54c\uace0\ub9ac\uc998 \uc911 \ud558\ub098\uc778 \uc720\ub2c8\uc628 \ud30c\uc778\ub4dc(Union-Find)\uc5d0 \ub300\ud574\uc11c \uc54c\uc544\ubcf4\uaca0\uc2b5\ub2c8\ub2e4. \uc774 \uc54c\uace0\ub9ac\uc998\uc740 \uadf8\ub798\ud504\uc758 \uc5f0\uacb0 \uc131\ubd84\uc744 \ucc3e\uac70\ub098, \uc9d1\ud569\uc744 \uad00\ub9ac\ud558\ub294 \ub370 \uc720\uc6a9\ud558\uba70, \ub2e4\uc591\ud55c \ubb38\uc81c \ud574\uacb0\uc5d0 \ud65c\uc6a9\ub429\ub2c8\ub2e4. \uc2dc\uc791\ud558\uae30 \uc804\uc5d0 \uc720\ub2c8\uc628 \ud30c\uc778\ub4dc\uc758 \uae30\ubcf8 \uac1c\ub150\uc744 \uc774\ud574\ud558\uace0, \uc2e4\uc81c \ubb38\uc81c\ud480\uc774 \uacfc\uc815\uc744 \ud1b5\ud574 \uad6c\uccb4\uc801\uc778 \ud65c\uc6a9 \ubc29\ubc95\uc744 \ubc30\uc6cc\ubcf4\uaca0\uc2b5\ub2c8\ub2e4. \uc720\ub2c8\uc628 \ud30c\uc778\ub4dc\ub780? \uc720\ub2c8\uc628 \ud30c\uc778\ub4dc\ub294 \uc8fc\uc5b4\uc9c4 \uc6d0\uc18c\ub4e4\uc774 \uc5b4\ub5a4 \uc5f0\uacb0\ub41c \uc9d1\ud569\ub4e4\ub85c \ub098\ub204\uc5b4\uc838 \uc788\ub294\uc9c0\ub97c \ucd94\uc801\ud560 \uc218 &hellip; <a href=\"https:\/\/atmokpo.com\/w\/28017\/\" class=\"more-link\">\ub354 \ubcf4\uae30<span class=\"screen-reader-text\"> &#8220;\uc790\ubc14\uc2a4\ud06c\ub9bd\ud2b8 \ucf54\ub529\ud14c\uc2a4\ud2b8 \uac15\uc88c, \uc720\ub2c8\uc628 \ud30c\uc778\ub4dc&#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":[26],"tags":[],"class_list":["post-28017","post","type-post","status-publish","format-standard","hentry","category-26"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\uc790\ubc14\uc2a4\ud06c\ub9bd\ud2b8 \ucf54\ub529\ud14c\uc2a4\ud2b8 \uac15\uc88c, \uc720\ub2c8\uc628 \ud30c\uc778\ub4dc - \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\/28017\/\" \/>\n<meta property=\"og:locale\" content=\"ko_KR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\uc790\ubc14\uc2a4\ud06c\ub9bd\ud2b8 \ucf54\ub529\ud14c\uc2a4\ud2b8 \uac15\uc88c, \uc720\ub2c8\uc628 \ud30c\uc778\ub4dc - \ub77c\uc774\ube0c\uc2a4\ub9c8\ud2b8\" \/>\n<meta property=\"og:description\" content=\"\uc548\ub155\ud558\uc138\uc694! \uc774\ubc88 \uc2dc\uac04\uc5d0\ub294 \ucf54\ub529\ud14c\uc2a4\ud2b8\uc5d0\uc11c \uc790\uc8fc \ub4f1\uc7a5\ud558\ub294 \uc54c\uace0\ub9ac\uc998 \uc911 \ud558\ub098\uc778 \uc720\ub2c8\uc628 \ud30c\uc778\ub4dc(Union-Find)\uc5d0 \ub300\ud574\uc11c \uc54c\uc544\ubcf4\uaca0\uc2b5\ub2c8\ub2e4. \uc774 \uc54c\uace0\ub9ac\uc998\uc740 \uadf8\ub798\ud504\uc758 \uc5f0\uacb0 \uc131\ubd84\uc744 \ucc3e\uac70\ub098, \uc9d1\ud569\uc744 \uad00\ub9ac\ud558\ub294 \ub370 \uc720\uc6a9\ud558\uba70, \ub2e4\uc591\ud55c \ubb38\uc81c \ud574\uacb0\uc5d0 \ud65c\uc6a9\ub429\ub2c8\ub2e4. \uc2dc\uc791\ud558\uae30 \uc804\uc5d0 \uc720\ub2c8\uc628 \ud30c\uc778\ub4dc\uc758 \uae30\ubcf8 \uac1c\ub150\uc744 \uc774\ud574\ud558\uace0, \uc2e4\uc81c \ubb38\uc81c\ud480\uc774 \uacfc\uc815\uc744 \ud1b5\ud574 \uad6c\uccb4\uc801\uc778 \ud65c\uc6a9 \ubc29\ubc95\uc744 \ubc30\uc6cc\ubcf4\uaca0\uc2b5\ub2c8\ub2e4. \uc720\ub2c8\uc628 \ud30c\uc778\ub4dc\ub780? \uc720\ub2c8\uc628 \ud30c\uc778\ub4dc\ub294 \uc8fc\uc5b4\uc9c4 \uc6d0\uc18c\ub4e4\uc774 \uc5b4\ub5a4 \uc5f0\uacb0\ub41c \uc9d1\ud569\ub4e4\ub85c \ub098\ub204\uc5b4\uc838 \uc788\ub294\uc9c0\ub97c \ucd94\uc801\ud560 \uc218 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