{"id":6483,"date":"2021-12-23T19:30:56","date_gmt":"2021-12-23T10:30:56","guid":{"rendered":"https:\/\/www.sria.co.jp\/blog\/?p=6483"},"modified":"2021-12-23T15:26:35","modified_gmt":"2021-12-23T06:26:35","slug":"6483","status":"publish","type":"post","link":"https:\/\/www.sria.co.jp\/blog\/2021\/12\/6483\/","title":{"rendered":"AtCoder Beginner Contest 051\u306eB\u554f\u984c\u3092\u89e3\u3044\u3066\u307f\u305f"},"content":{"rendered":"<p>AtCoder Beginner Contest 051\u306eB\u554f\u984c\u3092\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u306e\u7df4\u7fd2\u304c\u3066\u3089\u306b\u89e3\u3044\u3066\u307f\u307e\u3057\u305f\u3002<\/p>\n<p>AtCoder Beginner Contest\u306f\u7af6\u6280\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u521d\u7d1a\u8005\u7a0b\u5ea6\u3092\u60f3\u5b9a\u3057\u305f\u30b3\u30f3\u30c6\u30b9\u30c8\u3067\u3001A\u554f\u984c\u3001B\u554f\u984c\u3001C\u554f\u984c\u304f\u3089\u3044\u307e\u3067\u306f\u3061\u3087\u3046\u3069\u3044\u3044\u96e3\u6613\u5ea6\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002\uff08D\u554f\u984c\u4ee5\u964d\u306f\u96e3\u3057\u3044\uff09<\/p>\n<h2>\u554f\u984c<\/h2>\n<p>2 \u3064\u306e\u6574\u6570 K, S \u304c\u4e0e\u3048\u3089\u308c\u307e\u3059\u3002<br \/>\n3 \u3064\u306e\u5909\u6570 X, Y, Z \u304c\u3042\u308a\u30010 \u2266 X, Y, Z \u2266 K \u3092\u6e80\u305f\u3059\u6574\u6570\u306e\u5024\u3092\u53d6\u308a\u307e\u3059\u3002<br \/>\nX + Y + Z = S \u3092\u6e80\u305f\u3059 X, Y, Z \u3078\u306e\u5024\u306e\u5272\u308a\u5f53\u3066\u306f\u4f55\u901a\u308a\u3042\u308a\u307e\u3059\u304b\u3002<\/p>\n<h2>\u5236\u7d04<\/h2>\n<ul>\n<li>2 \u2266 K \u2266 2500<\/li>\n<li>0 \u2266 S \u2266 3K<\/li>\n<li>K, S \u306f\u6574\u6570\u3067\u3042\u308b\u3002<\/li>\n<\/ul>\n<p>\u554f\u984c\u3084\u5236\u7d04\u3001\u5165\u529b\u3001\u51fa\u529b\u306b\u95a2\u3057\u3066\u306f\u4ee5\u4e0b\u306e\u30ea\u30f3\u30af\u304b\u3089\u53c2\u7167\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<p><a href=\"https:\/\/atcoder.jp\/contests\/abc051\/tasks\/abc051_b\">https:\/\/atcoder.jp\/contests\/abc051\/tasks\/abc051_b<\/a><\/p>\n<h2>\u89e3\u7b54\u4f8b<\/h2>\n<p>\u8a00\u8a9e\u306fKotlin\u3067\u89e3\u304d\u307e\u3057\u305f\u3002<\/p>\n<div class=\"hcb_wrap\">\n<pre class=\"prism line-numbers lang-plain\" data-lang=\"Plain Text\">fun main() { \n    val (K, S) = readLine()?.split(\" \")?.map { it.toLong() } ?: throw Exception()\n    var count = 0\n    for (x in 0 until K + 1) {\n        for (y in 0 until K + 1) {\n            val z = (S - (x + y))\n            if (z in 0..K) {\n                count++\n            }\n        }\n    }\n    println(count)\n}<\/pre>\n<\/div>\n<h2>\u89e3\u8aac<\/h2>\n<p>\u307e\u305a\u554f\u984c\u3092\u8aad\u3093\u3067\u601d\u3044\u3064\u304f\u306e\u304cfor\u6587\u3092\u7528\u3044\u3066\uff13\u91cd\u30eb\u30fc\u30d7\u3067\u89e3\u304f\u65b9\u6cd5\u3067\u3059\u3002<\/p>\n<p>\u3057\u304b\u3057\u3001\uff13\u91cd\u30eb\u30fc\u30d7\u3067\u89e3\u304f\u3068\u6642\u9593\u304c\u304b\u304b\u3063\u3066\u3057\u307e\u3044\u3001\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u3057\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/p>\n<p>\u305d\u3053\u3067\u3001\uff13\u91cd\u30eb\u30fc\u30d7\u76ee\u306eZ\u3092\u6c42\u3081\u308b\u969b\u306b\u30eb\u30fc\u30d7\u3092\u4f7f\u308f\u305a\u306b\u6c42\u3081\u308b\u3053\u3068\u306b\u3088\u3063\u3066\u3001\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u305b\u305a\u306b\u89e3\u304d\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n<p>\u5177\u4f53\u7684\u306b\u306fS\u304b\u3089X\u3068Y\u3092\u8db3\u3057\u305f\u5024\u3092\u5f15\u3044\u305fZ\u3092\u8a08\u7b97\u3057\u3001\u305d\u306eZ\u304cK\u4ee5\u4e0b\u306e\u6642\u30010 \u2266 X, Y, Z \u2266 K\u3068X + Y + Z = S \u3092\u6e80\u305f\u3059\u306e\u3067\u3001\uff12\u91cd\u30eb\u30fc\u30d7\u3067\u89e3\u3051\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<h2>\u7d42\u308f\u308a\u306b<\/h2>\n<p>AtCoder\u306eAtCoder Beginner Contest\u306f\u30ed\u30b8\u30c3\u30af\u3092\u66f8\u304f\u7df4\u7fd2\u306b\u3061\u3087\u3046\u3069\u826f\u3044\u306e\u3067\u3001\u3053\u308c\u304b\u3089\u3082\u5b9a\u671f\u7684\u306b\u7df4\u7fd2\u3092\u3057\u3066\u3001C\u554f\u984c\u307e\u3067\u306f\u78ba\u5b9f\u306b\u89e3\u3051\u308b\u3088\u3046\u306b\u306a\u308a\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n<h2>\u53c2\u7167<\/h2>\n<p><a href=\"https:\/\/atcoder.jp\/contests\/abc051\/tasks\/abc051_b\">https:\/\/atcoder.jp\/contests\/abc051\/tasks\/abc051_b<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>AtCoder Beginner Contest 051\u306eB\u554f\u984c\u3092\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u306e\u7df4\u7fd2\u304c\u3066\u3089\u306b\u89e3\u3044\u3066\u307f\u307e\u3057\u305f\u3002 AtCoder Beginner Contest\u306f\u7af6\u6280\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u521d\u7d1a\u8005\u7a0b\u5ea6\u3092\u60f3\u5b9a\u3057\u305f\u30b3\u30f3\u30c6\u30b9\u30c8\u3067\u3001A\u554f\u984c&#8230;<\/p>\n","protected":false},"author":5,"featured_media":5156,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[8],"tags":[277,278],"_links":{"self":[{"href":"https:\/\/www.sria.co.jp\/blog\/wp-json\/wp\/v2\/posts\/6483"}],"collection":[{"href":"https:\/\/www.sria.co.jp\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.sria.co.jp\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.sria.co.jp\/blog\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/www.sria.co.jp\/blog\/wp-json\/wp\/v2\/comments?post=6483"}],"version-history":[{"count":19,"href":"https:\/\/www.sria.co.jp\/blog\/wp-json\/wp\/v2\/posts\/6483\/revisions"}],"predecessor-version":[{"id":6507,"href":"https:\/\/www.sria.co.jp\/blog\/wp-json\/wp\/v2\/posts\/6483\/revisions\/6507"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.sria.co.jp\/blog\/wp-json\/wp\/v2\/media\/5156"}],"wp:attachment":[{"href":"https:\/\/www.sria.co.jp\/blog\/wp-json\/wp\/v2\/media?parent=6483"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.sria.co.jp\/blog\/wp-json\/wp\/v2\/categories?post=6483"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.sria.co.jp\/blog\/wp-json\/wp\/v2\/tags?post=6483"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}