{"id":24547,"date":"2025-11-21T03:06:36","date_gmt":"2025-11-21T03:06:36","guid":{"rendered":"https:\/\/pokecon.jp\/job\/?p=24547"},"modified":"2025-11-21T03:06:36","modified_gmt":"2025-11-21T03:06:36","slug":"%e3%80%90%e6%8c%91%e6%88%a6%e7%8a%b6%e3%80%91%e8%aa%b0%e3%81%8c%e6%9b%b8%e3%81%84%e3%81%9f%e3%82%b3%e3%83%bc%e3%83%89%e3%81%8b%e5%bd%93%e3%81%a6%e3%81%beshow%ef%bc%81%ef%bc%81-%e3%80%9ckotlin-fest-202","status":"publish","type":"post","link":"https:\/\/pokecon.jp\/job\/24547\/","title":{"rendered":"\u3010\u6311\u6226\u72b6\u3011\u8ab0\u304c\u66f8\u3044\u305f\u30b3\u30fc\u30c9\u304b\u5f53\u3066\u307eShow\uff01\uff01 \u301cKotlin Fest 2025 \u30af\u30a4\u30ba\u30b3\u30f3\u30c6\u30f3\u30c4\u306e\u89e3\u8aac\u301c"},"content":{"rendered":"\n<\/p>\n<div>\n<p>\u3053\u3093\u306b\u3061\u306f\u3002\u682a\u5f0f\u4f1a\u793e\u30d8\u30f3\u30ea\u30fc\u3067\u958b\u767a\u8005\u3092\u3084\u3063\u3066\u3044\u308b<a target=\"_blank\" href=\"https:\/\/x.com\/n_takehata\">\u30bf\u30b1\u30cf\u30bf<\/a>\u3067\u3059\u3002<\/p>\n<p>\u30d8\u30f3\u30ea\u30fc\u306f\u53bb\u308b2025\u5e7411\u67081\u65e5\u306b\u3001<a target=\"_blank\" href=\"https:\/\/2025.kotlinfest.dev\">Kotlin Fest 2025<\/a>\u306b\u3053\u3068\u308a\u30b9\u30dd\u30f3\u30b5\u30fc\u3068\u3057\u3066\u30b9\u30dd\u30f3\u30b5\u30fc\u30d6\u30fc\u30b9\u3092\u51fa\u5c55\u3057\u307e\u3057\u305f\u3002<br \/>\u30a4\u30d9\u30f3\u30c8\u5f8c\u306b<a target=\"_blank\" href=\"https:\/\/dev.henry.jp\/entry\/2025\/thank-you-for-kotlin-fest-2025\">\u5831\u544a\u306e\u30a8\u30f3\u30c8\u30ea\u30fc<\/a>\u3067\u66f8\u3044\u3066\u3044\u305f\u306e\u3067\u3059\u304c\u3001\u30d6\u30fc\u30b9\u3067\u30b3\u30f3\u30c6\u30f3\u30c4\u3068\u3057\u3066\u30af\u30a4\u30ba\u3092\u51fa\u984c\u3057\u3001\u591a\u304f\u306e\u65b9\u306b\u30c1\u30e3\u30ec\u30f3\u30b8\u3057\u3066\u3044\u305f\u3060\u304d\u307e\u3057\u305f\u3002<\/p>\n<p>\u305d\u306e\u30af\u30a4\u30ba\u306f\u300c\u3010\u6311\u6226\u72b6\u3011\u8ab0\u304c\u66f8\u3044\u305f\u30b3\u30fc\u30c9\u304b\u5f53\u3066\u307eShow\uff01\uff01\u300d\u3068\u984c\u3057\u3001<strong>\u30d8\u30f3\u30ea\u30fc\u306e\u30a8\u30f3\u30b8\u30cb\u30a24\u4eba\u304c\u540c\u3058\u554f\u984c\u306b\u5bfe\u3057\u3066\u30b3\u30fc\u30c9\u3092\u66f8\u304d\u3001\u3069\u306e\u30b3\u30fc\u30c9\u3092\u8ab0\u304c\u66f8\u3044\u305f\u304b\u5f53\u3066\u3066\u3082\u3089\u3046<\/strong>\u3068\u3044\u3046\u3082\u306e\u3067\u3001\u975e\u5e38\u306b\u76db\u308a\u4e0a\u304c\u308a\u697d\u3057\u3093\u3067\u3044\u305f\u3060\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3057\u305f\u3002<br \/>\u305d\u3053\u3067\u4eca\u56de\u306f\u305d\u306e\u30af\u30a4\u30ba\u306e\u7d39\u4ecb\u3068\u7b54\u3048\u306e\u89e3\u8aac\u3092\u66f8\u3053\u3046\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n<p>\u6b63\u7b54\u306f\u4e0b\u306e\u65b9\u306b\u66f8\u304d\u307e\u3059\u306e\u3067\u3001\u3053\u306e\u8a18\u4e8b\u3092\u8aad\u3093\u3067\u3044\u305f\u3060\u3044\u3066\u3044\u308b\u307f\u306a\u3055\u307e\u3082\u305c\u3072\u30c1\u30e3\u30ec\u30f3\u30b8\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\uff01<\/p>\n<h2 id=\"\u56de\u7b54\u8005\u7d39\u4ecb\">\u56de\u7b54\u8005\u7d39\u4ecb<\/h2>\n<p>\u307e\u305a\u306f\u30b3\u30fc\u30c9\u3092\u66f8\u3044\u305f\u56de\u7b54\u80054\u540d\u306e\u7d39\u4ecb\u3067\u3059(\u79c1\u3082\u56de\u7b54\u3057\u3066\u3044\u307e\u3059)\u3002<br \/>\u3053\u3061\u3089\u306e\u30d7\u30ed\u30d5\u30a3\u30fc\u30eb\u304c<strong>\u3069\u306e\u30b3\u30fc\u30c9\u3092\u66f8\u3044\u305f\u304b\u5f53\u3066\u308b\u4e0a\u3067\u306e\u30d2\u30f3\u30c8<\/strong>\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p><figure class=\"figure-image figure-image-fotolife\" title=\"\u30b3\u30fc\u30c9\u3092\u66f8\u3044\u305f4\u540d\"><span itemscope=\"\" itemtype=\"http:\/\/schema.org\/Photograph\"><img decoding=\"async\" src=\"https:\/\/cdn-ak.f.st-hatena.com\/images\/fotolife\/h\/henry-app\/20251121\/20251121110005.png\" width=\"639\" height=\"800\" loading=\"lazy\" title=\"\" class=\"hatena-fotolife\" itemprop=\"image\"\/><\/span><figcaption>\u30b3\u30fc\u30c9\u3092\u66f8\u3044\u305f4\u540d<\/figcaption><\/figure>\n<\/p>\n<p>VPoT\u3084\u5275\u696d\u30a8\u30f3\u30b8\u30cb\u30a2\u3001\u6599\u7406\u9577\u307e\u3067\u3044\u3066\u30d0\u30e9\u30a8\u30c6\u30a3\u306b\u98db\u3093\u3060\u9762\u3005\u3067\u3059\u3002<\/p>\n<h2 id=\"\u554f\u984c\">\u554f\u984c<\/h2>\n<p>4\u4eba\u304c\u56de\u7b54\u3057\u305f\u554f\u984c\u306f\u4ee5\u4e0b\u3067\u3059\u3002<br \/>\u4e0a\u306e\u30b3\u30e1\u30f3\u30c8\u90e8\u5206\u304c\u554f\u984c\u3067\u3001\u66f8\u304b\u308c\u3066\u3044\u308b\u4ed5\u69d8\u306b\u6cbf\u3063\u3066<code>solve<\/code>\u95a2\u6570\u3092\u5b9f\u88c5\u3057\u3001\u60f3\u5b9a\u5b9f\u884c\u7d50\u679c\u3068\u540c\u3058\u5185\u5bb9\u304c\u51fa\u529b\u3055\u308c\u308b\u3088\u3046\u306b\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"code lang-kotlin\" data-lang=\"kotlin\" data-unlink=\"\">\n\n\n\n\n\n\n\n\n\n\n<span class=\"synType\">fun<\/span> solve(input: <span class=\"synType\">String<\/span>): <span class=\"synType\">String<\/span> {\n    \n}\n\n<span class=\"synType\">fun<\/span> main() {\n    <span class=\"synType\">val<\/span> inputs = listOf(\n        \n        <span class=\"synConstant\">\"\"\"<\/span>\n<span class=\"synConstant\">        alice 10<\/span>\n<span class=\"synConstant\">        bob 7<\/span>\n<span class=\"synConstant\">        alice 5<\/span>\n<span class=\"synConstant\">        cara 7<\/span>\n<span class=\"synConstant\">        dave 7<\/span>\n<span class=\"synConstant\">        \"\"\"<\/span>.trimIndent(),\n\n        \n        <span class=\"synConstant\">\"\"\"<\/span>\n<span class=\"synConstant\">        taku 30<\/span>\n<span class=\"synConstant\">        haru 20<\/span>\n<span class=\"synConstant\">        ken 25<\/span>\n<span class=\"synConstant\">        haru 15<\/span>\n<span class=\"synConstant\">        ken 10<\/span>\n<span class=\"synConstant\">        \"\"\"<\/span>.trimIndent(),\n\n        \n        <span class=\"synConstant\">\"\"\"<\/span>\n<span class=\"synConstant\">        a 5<\/span>\n<span class=\"synConstant\">        b 5<\/span>\n<span class=\"synConstant\">        c 5<\/span>\n<span class=\"synConstant\">        d 1<\/span>\n<span class=\"synConstant\">        e 10<\/span>\n<span class=\"synConstant\">        \"\"\"<\/span>.trimIndent()\n    )\n\n    <span class=\"synStatement\">for<\/span> ((i, input) <span class=\"synStatement\">in<\/span> inputs.withIndex()) {\n        println(<span class=\"synConstant\">\"=== Case <\/span><span class=\"synIdentifier\">${<\/span>i <span class=\"synStatement\">+<\/span> <span class=\"synConstant\">1<\/span><span class=\"synIdentifier\">}<\/span><span class=\"synConstant\"> ===\"<\/span>)\n        println(solve(input))\n        println()\n    }\n}\n\n\u60f3\u5b9a\u5b9f\u884c\u7d50\u679c\n<span class=\"synStatement\">===<\/span> Case <span class=\"synConstant\">1<\/span> <span class=\"synStatement\">===<\/span>\n<span class=\"synConstant\">1<\/span>. alice <span class=\"synConstant\">15<\/span>\n<span class=\"synConstant\">2<\/span>. bob <span class=\"synConstant\">7<\/span>\n<span class=\"synConstant\">2<\/span>. cara <span class=\"synConstant\">7<\/span>\n<span class=\"synConstant\">2<\/span>. dave <span class=\"synConstant\">7<\/span>\n\n<span class=\"synStatement\">===<\/span> Case <span class=\"synConstant\">2<\/span> <span class=\"synStatement\">===<\/span>\n<span class=\"synConstant\">1<\/span>. haru <span class=\"synConstant\">35<\/span>\n<span class=\"synConstant\">1<\/span>. ken <span class=\"synConstant\">35<\/span>\n<span class=\"synConstant\">3<\/span>. taku <span class=\"synConstant\">30<\/span>\n\n<span class=\"synStatement\">===<\/span> Case <span class=\"synConstant\">3<\/span> <span class=\"synStatement\">===<\/span>\n<span class=\"synConstant\">1<\/span>. e <span class=\"synConstant\">10<\/span>\n<span class=\"synConstant\">2<\/span>. a <span class=\"synConstant\">5<\/span>\n<span class=\"synConstant\">2<\/span>. b <span class=\"synConstant\">5<\/span>\n<span class=\"synConstant\">2<\/span>. c <span class=\"synConstant\">5<\/span>\n<\/pre>\n<p>Collection\u64cd\u4f5c\u304c\u591a\u304f\u5fc5\u8981\u3067\u3001\u66f8\u304d\u65b9\u306e\u30af\u30bb\u304c\u51fa\u3084\u3059\u3044\u554f\u984c\u306b\u306a\u3063\u3066\u3044\u308b\u3068\u3053\u308d\u304c\u30dd\u30a4\u30f3\u30c8\u3067\u3059\u3002<\/p>\n<h2 id=\"\u9078\u629e\u80a24\u4eba\u306e\u30a8\u30f3\u30b8\u30cb\u30a2\u304c\u66f8\u3044\u305f\u30b3\u30fc\u30c9\">\u9078\u629e\u80a2(4\u4eba\u306e\u30a8\u30f3\u30b8\u30cb\u30a2\u304c\u66f8\u3044\u305f\u30b3\u30fc\u30c9)<\/h2>\n<p>\u305d\u3057\u3066\u305d\u308c\u305e\u308c\u306e\u30a8\u30f3\u30b8\u30cb\u30a2\u304c\u66f8\u3044\u305f\u30b3\u30fc\u30c9\u304c\u4ee5\u4e0b\u306eA\u301cD\u306e4\u3064\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p><strong>A\u306e\u56de\u7b54<\/strong><\/p>\n<pre class=\"code lang-kotlin\" data-lang=\"kotlin\" data-unlink=\"\"><span class=\"synType\">fun<\/span> solve(input: <span class=\"synType\">String<\/span>): <span class=\"synType\">String<\/span> {\n    <span class=\"synType\">var<\/span> prevScore: <span class=\"synType\">Int<\/span>? = <span class=\"synConstant\">null<\/span>\n    <span class=\"synType\">var<\/span> prevRank = <span class=\"synConstant\">1<\/span>\n    <span class=\"synStatement\">return<\/span> input.split(<span class=\"synConstant\">\"<\/span><span class=\"synSpecial\">\\n<\/span><span class=\"synConstant\">\"<\/span>)\n        .map { it.split(<span class=\"synConstant\">\" \"<\/span>) }\n        .groupBy({ it[<span class=\"synConstant\">0<\/span>] }, { it[<span class=\"synConstant\">1<\/span>].toInt() })\n        .mapValues { it.value.sum() }\n        .toList()\n        .sortedWith(compareByDescendingPairString, <span class=\"synType\">Int<\/span>&gt;&gt; { it.second }.thenBy { it.first })\n        .mapIndexed { index, (name, score) <span class=\"synType\">-&gt;<\/span>\n            <span class=\"synType\">val<\/span> rank = <span class=\"synStatement\">if<\/span> (prevScore <span class=\"synStatement\">==<\/span> <span class=\"synConstant\">null<\/span> <span class=\"synStatement\">||<\/span> prevScore<span class=\"synStatement\"> &gt;<\/span> score) {\n                index <span class=\"synStatement\">+<\/span> <span class=\"synConstant\">1<\/span>\n            } <span class=\"synStatement\">else<\/span> {\n                prevRank\n            }\n\n            (rank to <span class=\"synConstant\">\"<\/span><span class=\"synIdentifier\">$name<\/span><span class=\"synConstant\"> <\/span><span class=\"synIdentifier\">$score<\/span><span class=\"synConstant\">\"<\/span>).also {\n                prevScore = score\n                prevRank = rank\n            }\n        }.takeWhile { it.first <span class=\"synStatement\"><span class=\"synConstant\">3<\/span> }\n        .joinToString(<span class=\"synConstant\">\"<\/span><span class=\"synSpecial\">\\n<\/span><span class=\"synConstant\">\"<\/span>) {\n            <span class=\"synConstant\">\"<\/span><span class=\"synIdentifier\">${<\/span>it.first<span class=\"synIdentifier\">}<\/span><span class=\"synConstant\">. <\/span><span class=\"synIdentifier\">${<\/span>it.second<span class=\"synIdentifier\">}<\/span><span class=\"synConstant\">\"<\/span>\n        }\n}\n<\/span><\/pre>\n<p><strong>B\u306e\u56de\u7b54<\/strong><\/p>\n<pre class=\"code lang-kotlin\" data-lang=\"kotlin\" data-unlink=\"\"><span class=\"synType\">fun<\/span> solve(input: <span class=\"synType\">String<\/span>): <span class=\"synType\">String<\/span> {\n    <span class=\"synType\">val<\/span> rankingList = input.lineSequence().map { line <span class=\"synType\">-&gt;<\/span>\n        <span class=\"synType\">val<\/span> array = line.split(<span class=\"synConstant\">\" \"<\/span>)\n        <span class=\"synType\">Pair<\/span>(array[<span class=\"synConstant\">0<\/span>], array[<span class=\"synConstant\">1<\/span>])\n    }.groupingBy {\n        it.first\n    }.fold(<span class=\"synConstant\">0<\/span>) { sum, (_, score) <span class=\"synType\">-&gt;<\/span>\n        sum <span class=\"synStatement\">+<\/span> score.toInt()\n    }.toList().sortedWith(\n        compareByDescendingPairString, <span class=\"synType\">Int<\/span>&gt;&gt; { it.second }.thenBy { it.first }\n    )\n\n    <span class=\"synStatement\">return<\/span> buildString {\n        <span class=\"synType\">var<\/span> rank = <span class=\"synConstant\">0<\/span>\n        <span class=\"synType\">var<\/span> lastScore = <span class=\"synConstant\">0<\/span>\n        rankingList.forEachIndexed { index, (name, score) <span class=\"synType\">-&gt;<\/span>\n            <span class=\"synStatement\">if<\/span> (lastScore <span class=\"synStatement\">!=<\/span> score) {\n                rank = index <span class=\"synStatement\">+<\/span> <span class=\"synConstant\">1<\/span>\n            }\n            <span class=\"synStatement\">if<\/span> (rank<span class=\"synStatement\"> &gt;<\/span> <span class=\"synConstant\">3<\/span>) {\n                <span class=\"synStatement\">return<\/span>@forEachIndexed\n            }\n            appendLine(<span class=\"synConstant\">\"<\/span><span class=\"synIdentifier\">$rank<\/span><span class=\"synConstant\">. <\/span><span class=\"synIdentifier\">$name<\/span><span class=\"synConstant\"> <\/span><span class=\"synIdentifier\">$score<\/span><span class=\"synConstant\">\"<\/span>)\n\n            lastScore = score\n        }\n    }\n}\n<\/pre>\n<p><strong>C\u306e\u56de\u7b54<\/strong><\/p>\n<pre class=\"code lang-kotlin\" data-lang=\"kotlin\" data-unlink=\"\"><span class=\"synType\">fun<\/span> solve(input: <span class=\"synType\">String<\/span>): <span class=\"synType\">String<\/span> {\n    <span class=\"synType\">val<\/span> scoreMap = buildMapString, <span class=\"synType\">Int<\/span>&gt; {\n        input.lineSequence().forEach {\n            <span class=\"synType\">val<\/span> (name, score) = it.split(<span class=\"synConstant\">' '<\/span>, limit = <span class=\"synConstant\">2<\/span>)\n            <span class=\"synStatement\">set<\/span>(name, getOrDefault(name, <span class=\"synConstant\">0<\/span>) <span class=\"synStatement\">+<\/span> score.toInt())\n        }\n    }\n    <span class=\"synType\">val<\/span> rankingMap = scoreMap\n        .asIterable()\n        .sortedWith(compareByDescendingMap.<span class=\"synType\">Entry<\/span>String, <span class=\"synType\">Int<\/span>&gt;&gt; { it.value }.thenBy { it.key })\n        .groupBy({ it.value }, { it.key })\n    <span class=\"synType\">val<\/span> topScorers = sequenceTripleInt, <span class=\"synType\">String<\/span>, <span class=\"synType\">Int<\/span>&gt;&gt; {\n        <span class=\"synType\">var<\/span> rank = <span class=\"synConstant\">1<\/span>\n        <span class=\"synStatement\">for<\/span> ((score, names) <span class=\"synStatement\">in<\/span> rankingMap) {\n            <span class=\"synType\">val<\/span> competitionRank = rank \n            <span class=\"synStatement\">for<\/span> (name <span class=\"synStatement\">in<\/span> names) {\n                yield(<span class=\"synType\">Triple<\/span>(competitionRank, name, score))\n                rank<span class=\"synStatement\">++<\/span>\n            }\n        }\n    }\n    <span class=\"synStatement\">return<\/span> topScorers\n        .takeWhile { (rank, _, _) <span class=\"synType\">-&gt;<\/span> rank <span class=\"synStatement\"><span class=\"synConstant\">3<\/span> }\n        .joinToString(<span class=\"synConstant\">\"<\/span><span class=\"synSpecial\">\\n<\/span><span class=\"synConstant\">\"<\/span>) { (rank, name, score) <span class=\"synType\">-&gt;<\/span> <span class=\"synConstant\">\"<\/span><span class=\"synIdentifier\">$rank<\/span><span class=\"synConstant\">. <\/span><span class=\"synIdentifier\">$name<\/span><span class=\"synConstant\"> <\/span><span class=\"synIdentifier\">$score<\/span><span class=\"synConstant\">\"<\/span> }\n}\n<\/span><\/pre>\n<p><strong>D\u306e\u56de\u7b54<\/strong><\/p>\n<pre class=\"code lang-kotlin\" data-lang=\"kotlin\" data-unlink=\"\"><span class=\"synPreProc\">import<\/span> java.util.TreeSet\n\n<span class=\"synType\">typealias<\/span> Name = <span class=\"synType\">String<\/span>\n<span class=\"synType\">typealias<\/span> Score = <span class=\"synType\">Int<\/span>\n\n<span class=\"synType\">fun<\/span> solve(input: <span class=\"synType\">String<\/span>): <span class=\"synType\">String<\/span> {\n    \n    <span class=\"synType\">data<\/span> <span class=\"synType\">class<\/span> <span class=\"synType\">Entry<\/span>(<span class=\"synType\">val<\/span> name: Name, <span class=\"synType\">val<\/span> score: Score)\n    <span class=\"synType\">data<\/span> <span class=\"synType\">class<\/span> RankedEntry(<span class=\"synType\">val<\/span> rank: <span class=\"synType\">Int<\/span>, <span class=\"synType\">val<\/span> entry: <span class=\"synType\">Entry<\/span>)\n\n    \n    <span class=\"synType\">class<\/span> Ranking : TreeSetEntry&gt;(\n        compareByDescendingEntry&gt; { it.score }\n            .thenBy { it.name }\n    )\n\n    <span class=\"synType\">tailrec<\/span> <span class=\"synType\">fun<\/span> aggregateScores(\n        remaining: <span class=\"synType\">List<\/span>String&gt;,\n        scoreMap: <span class=\"synType\">HashMap<\/span><name score=\"\"> = <span class=\"synType\">HashMap<\/span>()\n    ): <span class=\"synType\">HashMap<\/span><name score=\"\"> {\n        <span class=\"synStatement\">if<\/span> (remaining.isEmpty()) <span class=\"synStatement\">return<\/span> scoreMap\n\n        <span class=\"synType\">val<\/span> line = remaining.first().trim()\n        <span class=\"synStatement\">if<\/span> (line.isNotBlank()) {\n            <span class=\"synType\">val<\/span> (name, scoreStr) = line.split(<span class=\"synConstant\">' '<\/span>)\n            <span class=\"synType\">val<\/span> score = scoreStr.toInt()\n\n            scoreMap[name] = (scoreMap[name] <span class=\"synStatement\">?:<\/span> <span class=\"synConstant\">0<\/span>) <span class=\"synStatement\">+<\/span> score\n\n            <span class=\"synStatement\">return<\/span> aggregateScores(\n                remaining.drop(<span class=\"synConstant\">1<\/span>),\n                scoreMap\n            )\n        }\n        <span class=\"synStatement\">return<\/span> aggregateScores(remaining.drop(<span class=\"synConstant\">1<\/span>), scoreMap)\n    }\n\n    \n    <span class=\"synType\">val<\/span> scoreMap = aggregateScores(input.lines())\n\n    \n    <span class=\"synType\">val<\/span> ranking = scoreMap\n        .map { (name, score) <span class=\"synType\">-&gt;<\/span> <span class=\"synType\">Entry<\/span>(name, score) }\n        .toCollection(Ranking())\n\n    \n    <span class=\"synStatement\">return<\/span> ranking\n        .foldIndexed(listOf<rankedentry>()) { index, acc, entry <span class=\"synType\">-&gt;<\/span>\n            \n            <span class=\"synType\">val<\/span> rank = <span class=\"synStatement\">if<\/span> (index<span class=\"synStatement\"> &gt;<\/span> <span class=\"synConstant\">0<\/span> <span class=\"synStatement\">&amp;&amp;<\/span> acc.last().entry.score <span class=\"synStatement\">==<\/span> entry.score) {\n                \n                acc.last().rank\n            } <span class=\"synStatement\">else<\/span> {\n                \n                index <span class=\"synStatement\">+<\/span> <span class=\"synConstant\">1<\/span>\n            }\n            acc <span class=\"synStatement\">+<\/span> RankedEntry(rank, entry)\n        }\n        .takeWhile { it.rank <span class=\"synStatement\"><span class=\"synConstant\">3<\/span> }\n        .joinToString(<span class=\"synConstant\">\"<\/span><span class=\"synSpecial\">\\\\<\/span><span class=\"synConstant\">n\"<\/span>) { <span class=\"synConstant\">\"<\/span><span class=\"synIdentifier\">${<\/span>it.rank<span class=\"synIdentifier\">}<\/span><span class=\"synConstant\">. <\/span><span class=\"synIdentifier\">${<\/span>it.entry.name<span class=\"synIdentifier\">}<\/span><span class=\"synConstant\"> <\/span><span class=\"synIdentifier\">${<\/span>it.entry.score<span class=\"synIdentifier\">}<\/span><span class=\"synConstant\">\"<\/span> }\n}\n<\/span><\/rankedentry><\/name><\/name><\/pre>\n<h3 id=\"\u3053\u3053\u307e\u3067\u304c\u554f\u984c\u306b\u306a\u308a\u307e\u3059\">\u3053\u3053\u307e\u3067\u304c\u554f\u984c\u306b\u306a\u308a\u307e\u3059\uff01<\/h3>\n<p>\u8ab0\u304c\u3069\u306e\u30b3\u30fc\u30c9\u3092\u66f8\u3044\u305f\u304b\u308f\u304b\u308a\u307e\u3057\u305f\u304b\uff1f<br \/>\u6b63\u7b54\u3068\u89e3\u8aac\u306f\u4e0b\u306e\u65b9\u306b\u3042\u308a\u307e\u3059\u306e\u3067\u3001\u56de\u7b54\u3092\u7d42\u3048\u305f\u65b9\u306f\u4e0b\u306e\u65b9\u3078\u30b9\u30af\u30ed\u30fc\u30eb\u3057\u3066\u304f\u3060\u3055\u3044\uff01<\/p>\n<h2 id=\"A-Kengo-TODA\">A: Kengo TODA<\/h2>\n<p>A\u306f\u30d8\u30f3\u30ea\u30fc\u306eVPoT\u3001VPoE\u3067\u3042\u308bKengo TODA\u304c\u66f8\u3044\u305f\u30b3\u30fc\u30c9\u3067\u3057\u305f\u3002<br \/>\u30dd\u30a4\u30f3\u30c8\u3068\u3057\u3066\u306f<strong>\u3059\u3079\u3066\u306e\u51e6\u7406\u3092\u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\u3067\u66f8\u3044\u3066\u3044\u308b<\/strong>\u70b9\u3067\u3059\u306d\u3002<br \/>\u300c\u3072\u3068\u3053\u3068\u300d\u306b\u66f8\u304b\u308c\u3066\u3044\u308b\u300c\u5168\u3066\u306f\u6d41\u308c\u3067\u3042\u308a\u3001\u6d41\u308c\u3053\u305d\u304c\u5168\u3066\u3067\u3042\u308b&#8230;\u300d\u3067\u59cb\u307e\u308b\u6587\u7ae0\u304c\u30d2\u30f3\u30c8\u3067\u3001\u3059\u3079\u3066\u304c\u30c1\u30a7\u30fc\u30f3\u3055\u308c\u3066\u3044\u308b\u30b3\u30fc\u30c9\u306f\u3001\u307e\u308b\u3067\u6d41\u308c\u306b\u8eab\u3092\u4efb\u305b\u3066\u3044\u308b\u304b\u306e\u3088\u3046\u306a\u51e6\u7406\u3092\u8868\u73fe\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u6b63\u89e3\u3055\u308c\u305f\u65b9\u304b\u3089\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u30b3\u30e1\u30f3\u30c8\u3092\u3044\u305f\u3060\u304d\u307e\u3057\u305f\u3002<\/p>\n<ul>\n<li>\u5168\u3066\u306f\u6d41\u308c\u3067\u3042\u308a\u3001\u6d41\u308c\u3053\u305d\u304c\u5168\u3066\u3067\u3042\u308b\u3063\u3066\u66f8\u3044\u3066\u3042\u308b\u304b\u3089\u5168\u90e8\u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\u3057\u3066\u308b\u4eba\u3060\u3068\u601d\u3063\u305f<\/li>\n<li>\u521d\u624bsplit(&#8220;\\n&#8221;)\u3057\u3066\u308b\u306e\u306fJava\u3063\u307d\u3044\u3068\u601d\u3063\u305f\u306e\u3067\u3001Kotlin\u3092\u597d\u304d\u3063\u3066\u66f8\u3044\u3066\u308b\u4eba\u3068\u306f\u9055\u3046\u3068\u601d\u3063\u305f<\/li>\n<\/ul>\n<p>\u9069\u5207\u306b\u30d2\u30f3\u30c8\u3092\u8aad\u307f\u53d6\u3063\u3066\u6b63\u89e3\u3055\u308c\u3066\u3044\u308b\u65b9\u3082\u591a\u304f\u3044\u307e\u3057\u305f\uff01<\/p>\n<h2 id=\"B-\u30bf\u30b1\u30cf\u30bf\">B: \u30bf\u30b1\u30cf\u30bf<\/h2>\n<p>B\u306f\u79c1\u3001\u30bf\u30b1\u30cf\u30bf\u304c\u66f8\u3044\u305f\u30b3\u30fc\u30c9\u3067\u3057\u305f\u3002<br \/>\u79c1\u306f\u4e00\u5fdcKotlin\u306e\u66f8\u7c4d\u3082\u904e\u53bb\u306b\u51fa\u7248\u3057\u3066\u3044\u3066\u3001\u300c\u3072\u3068\u3053\u3068\u300d\u306b\u3082\u66f8\u3044\u3066\u3044\u308b\u901a\u308a\u300c\uff9c\uff80\uff7c Kotlin \uff81\uff6e\uff6f\uff84\uff83\uff9e\uff77\uff99\u300d\u4eba\u9593\u3068\u3057\u3066\u540d\u4e57\u3063\u3066\u3044\u307e\u3059\u3002<br \/>\u306a\u306e\u3067<code>groupingBy<\/code>\u3068<code>fold<\/code>\u3068\u3044\u3046\u666e\u901a\u306e\u4eba\u304c\u306a\u304b\u306a\u304b\u77e5\u3089\u306a\u3044\u95a2\u6570\u3092\u4f7f\u7528\u3057\u305f\u308a\u3001<code>Pair<\/code>\u306eList\u3092<code>forEachIndexed<\/code>\u3067\u56de\u3059\u6642\u306b<code>(name, score)<\/code>\u3067\u6271\u3063\u305f\u308a\u3068\u3001<strong>Kotlin\u306e\u6a5f\u80fd\u3092\u3075\u3093\u3060\u3093\u306b\u4f7f\u3063\u305f\u30b3\u30fc\u30c9<\/strong>\u306b\u4ed5\u4e0a\u3052\u307e\u3057\u305f\u3002<\/p>\n<p>\u6b63\u89e3\u3055\u308c\u305f\u65b9\u304b\u3089\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u30b3\u30e1\u30f3\u30c8\u3092\u3044\u305f\u3060\u304d\u307e\u3057\u305f\u3002<\/p>\n<ul>\n<li>Pair\u3092(name, score)\u3067\u6271\u3063\u3066\u308b\u306e\u306fKotlin\u7384\u4eba\u3063\u307d\u3044\u611f\u3058\u304c\u3057\u305f<\/li>\n<li>buildString\u306fKotlin\u77e5\u3063\u3066\u308b\u4eba\u3063\u307d\u3044<\/li>\n<\/ul>\n<p>\u500b\u4eba\u7684\u306a\u60f3\u5b9a\u3068\u306f\u9055\u3063\u305f\u306e\u3067\u3059\u304c\u3001<code>StringBuilder<\/code>\u3067\u306f\u306a\u304f<code>buildString<\/code>\u3092\u4f7f\u3046\u3068\u3053\u308d\u306bKotlin\u3063\u307d\u3055\u3092\u611f\u3058\u3066\u308f\u304b\u3063\u305f\u3068\u3044\u3046\u65b9\u304c\u304b\u306a\u308a\u591a\u304f\u3044\u307e\u3057\u305f\uff01<br \/>\u3084\u306f\u308aKotlin Fest\u3067\u306fKotlin\u304c\u597d\u304d\u306a\u65b9\u304c\u591a\u304f\u6765\u3089\u308c\u3066\u3044\u305f\u306e\u3067\u3001\u3053\u3046\u3044\u3063\u305f\u610f\u898b\u3082\u8208\u5473\u6df1\u304b\u3063\u305f\u3067\u3059\u3002<\/p>\n<h2 id=\"C-creasty\">C: creasty<\/h2>\n<p>C\u306f\u30d8\u30f3\u30ea\u30fc\u306e\u5275\u696d\u30a8\u30f3\u30b8\u30cb\u30a2\u3067\u3042\u308bcreasty\u304c\u66f8\u3044\u305f\u30b3\u30fc\u30c9\u3067\u3057\u305f\u3002<br \/>\u3053\u306e\u30b3\u30fc\u30c9\u306f\u6b63\u7b54\u7387\u3082\u4f4e\u304f\u3001\u79c1\u3082\u30dd\u30a4\u30f3\u30c8\u304c\u308f\u304b\u3089\u306a\u304b\u3063\u305f\u306e\u3067\u306a\u306b\u304c\u30d2\u30f3\u30c8\u3060\u3063\u305f\u306e\u304b\u5f8c\u304b\u3089\u672c\u4eba\u306b\u78ba\u8a8d\u3057\u305f\u306e\u3067\u3059\u304c\u3001\u306a\u3093\u3068<strong>\u300c\u306a\u306b\u3082\u8003\u3048\u3066\u306a\u304b\u3063\u305f\u300d<\/strong>\u3068\u3044\u3046\u7b54\u3048\u304c\u8fd4\u3063\u3066\u304d\u307e\u3057\u305f\uff01<br \/>\u3064\u307e\u308a\u30d7\u30ed\u30d5\u30a3\u30fc\u30eb\u306b\u306f<strong>\u30d2\u30f3\u30c8\u304c\u306a\u306b\u3082\u306a\u304b\u3063\u305f<\/strong>\u306e\u3067\u3059\u3002\u3069\u304a\u308a\u3067\u6b63\u7b54\u7387\u304c\u4f4e\u3044\u308f\u3051\u3067\u3059\u306d\u3002<\/p>\n<p>\u3061\u306a\u307f\u306b\u6b63\u89e3\u3055\u308c\u305f\u65b9\u306e\u4e2d\u306b\u306f<\/p>\n<ul>\n<li>\u4e88\u6e2c\u4e0d\u80fd\u3063\u3066\u66f8\u3044\u3066\u308b\u304b\u3089\u3053\u308c\u3060\u3068\u601d\u3063\u305f<\/li>\n<\/ul>\n<p>\u3068\u304a\u3063\u3057\u3083\u3063\u3066\u3044\u305f\u65b9\u3082\u3044\u305f\u306e\u3067\u3059\u304c\u3001\u305d\u306e\u65b9\u306b\u306f\u30b3\u30fc\u30c9\u304b\u3089\u306a\u306b\u304b\u611f\u3058\u308b\u4e88\u6e2c\u4e0d\u80fd\u306a\u8981\u7d20\u304c\u3042\u3063\u305f\u306e\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002<\/p>\n<h2 id=\"D-giiita\">D: giiita<\/h2>\n<p>D\u306f\u30d8\u30f3\u30ea\u30fc\u306e\u6599\u7406\u9577\u3067\u3042\u308bgiiita\u304c\u66f8\u3044\u305f\u30b3\u30fc\u30c9\u3067\u3057\u305f\u3002<br \/>\u30dd\u30a4\u30f3\u30c8\u3068\u3057\u3066\u306f\u300c\u3072\u3068\u3053\u3068\u300d\u306b\u3042\u308b\u300c\u696d\u52d9\u30b3\u30fc\u30c9\u3068\u3057\u3066\u30ec\u30d3\u30e5\u30fc\u3057\u3066\u3082\u3089\u3046\u6c17\u6301\u3061\u3067\u5b9f\u88c5\u3057\u307e\u3057\u305f\u300d\u3068\u66f8\u304b\u308c\u3066\u3044\u308b\u901a\u308a\u3001<strong>\u30b3\u30fc\u30c9\u306b\u4e01\u5be7\u306a\u30b3\u30e1\u30f3\u30c8\u304c\u66f8\u304b\u308c\u3066\u3044\u308b\u70b9<\/strong>\u3067\u3059\u306d\u3002<br \/>\u3042\u3068\u306f\u300c\u597d\u304d\u306a\u8a00\u8a9e\u300d\u306b<strong>Scala<\/strong>\u3092\u66f8\u3044\u3066\u3044\u308b\u3053\u3068\u3082\u30dd\u30a4\u30f3\u30c8\u3067\u3001\u6b63\u89e3\u3055\u308c\u305f\u65b9\u304b\u3089\u306f<\/p>\n<ul>\n<li>tailrec\u4f7f\u3046\u306e\u7d76\u5bfeScala\u306e\u4eba\u3067\u3057\u3087\uff01<\/li>\n<\/ul>\n<p>\u3068\u3044\u3046\u30b3\u30e1\u30f3\u30c8\u3082\u3044\u305f\u3060\u304d\u307e\u3057\u305f\u3002<br \/>\u3053\u306e\u30b3\u30fc\u30c9\u306f\u6b63\u7b54\u7387\u3082\u4e00\u756a\u9ad8\u304b\u3063\u305f\u3067\u3059\uff01<\/p>\n<p>\u3042\u3068\u306f\u306a\u305c\u304b<\/p>\n<ul>\n<li><strong>\u300c\u8da3\u5473: \u571f\u5730\u9593\u53d6\u308a\u63a2\u3057\u300d\u3067\u308f\u304b\u308a\u307e\u3057\u305f\uff01<\/strong><\/li>\n<\/ul>\n<p>\u3068\u304a\u3063\u3057\u3083\u3063\u3066\u3044\u305f\u65b9\u3082\u304a\u308a\u3001\u3084\u306f\u308a\u30b3\u30fc\u30c9\u306b\u306f\u30a8\u30f3\u30b8\u30cb\u30a2\u306e\u69d8\u3005\u306a\u4e00\u9762\u304c\u8868\u73fe\u3055\u308c\u308b\u3082\u306e\u306a\u306e\u3060\u306a\u3068\u3001\u611f\u52d5\u3092\u899a\u3048\u307e\u3057\u305f\u3002<\/p>\n<p>\u672c\u8a18\u4e8b\u3092\u8aad\u3093\u3067\u3044\u305f\u3060\u3044\u305f\u307f\u306a\u3055\u307e\u306f\u3001\u3069\u306e\u30b3\u30fc\u30c9\u3092\u8ab0\u304c\u66f8\u3044\u305f\u304b\u308f\u304b\u3063\u305f\u3067\u3057\u3087\u3046\u304b\uff1f<\/p>\n<p>\u5f53\u65e5\u3001\u30d6\u30fc\u30b9\u3067\u3053\u3061\u3089\u306e\u30af\u30a4\u30ba\u3092\u591a\u304f\u306e\u65b9\u304c\u771f\u5263\u306b\u53d6\u308a\u7d44\u307f\u3001\u697d\u3057\u3093\u3067\u3044\u305f\u3060\u3051\u307e\u3057\u305f\uff01<br \/>\u304b\u306a\u308a\u96e3\u3057\u3044\u30af\u30a4\u30ba\u306b\u306a\u308b\u304b\u3068\u601d\u3063\u305f\u306e\u3067\u3059\u304c\u3001\u60f3\u50cf\u4ee5\u4e0a\u306b\u591a\u304f\u306e\u65b9\u304c\u6b63\u89e3\u3057\u3066\u3044\u3066\u3001\u53c2\u52a0\u8005\u306e\u307f\u306a\u3055\u307e\u306e\u6d1e\u5bdf\u529b\u306b\u9a5a\u304d\u307e\u3057\u305f\u3002<br \/>\u4eca\u5f8c\u3082\u30d8\u30f3\u30ea\u30fc\u3067\u306f\u69d8\u3005\u306a\u30a4\u30d9\u30f3\u30c8\u3067\u3001\u697d\u3057\u3093\u3067\u3044\u305f\u3060\u3051\u308b\u30b3\u30f3\u30c6\u30f3\u30c4\u3092\u7528\u610f\u3057\u3066\u3044\u304d\u307e\u3059\u306e\u3067\u3001\u30d6\u30fc\u30b9\u306a\u3069\u3067\u898b\u304b\u3051\u305f\u969b\u306f\u305c\u3072\u304a\u7acb\u3061\u5bc4\u308a\u304f\u3060\u3055\u3044\uff01<\/p>\n<p>\u6700\u5f8c\u306b\u544a\u77e5\u3067\u3059\u3002<br \/>\u30d8\u30f3\u30ea\u30fc\u3067\u306f11\u670825\u65e5(\u706b)\u306b\u3001Kotlin Fest 2025\u306e\u975e\u516c\u5f0f\u30a2\u30d5\u30bf\u30fc\u30a4\u30d9\u30f3\u30c8\u3068\u3057\u3066<strong>Server-Side Kotlin Night 2025<\/strong>\u3092\u958b\u50ac\u3057\u307e\u3059\uff01<\/p>\n<p><iframe src=\"https:\/\/hatenablog-parts.com\/embed?url=https%3A%2F%2Fhenry.connpass.com%2Fevent%2F373576\" title=\"Server-Side Kotlin Night 2025 (2025\/11\/25 19:00\u301c)\" class=\"embed-card embed-webcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 155px; max-width: 500px; margin: 10px 0px;\" loading=\"lazy\"><\/iframe><cite class=\"hatena-citation\"><a target=\"_blank\" href=\"https:\/\/henry.connpass.com\/event\/373576\">henry.connpass.com<\/a><\/cite><\/p>\n<p>\u5f0a\u793e\u304b\u3089Kotlin Fest\u306b\u767b\u58c7\u3057\u305f<a target=\"_blank\" href=\"https:\/\/x.com\/nabeo\">nabeo<\/a>\u3082\u542b\u3080\u3001\u8a088\u540d\u306e\u767b\u58c7\u8005\u3067\u304a\u9001\u308a\u3059\u308bServer-Side Kotlin\u306e\u30a4\u30d9\u30f3\u30c8\u3067\u3059\u3002<br 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