{"id":221,"date":"2026-07-03T12:07:46","date_gmt":"2026-07-03T03:07:46","guid":{"rendered":"https:\/\/yorunekomint.com\/?p=221"},"modified":"2026-07-03T12:09:07","modified_gmt":"2026-07-03T03:09:07","slug":"%e3%80%90%e5%8b%95%e7%94%bb%e3%81%82%e3%82%8a%e3%80%91atcoder-abc%e3%80%8ca-decisive-battle%e3%80%8d%e8%a7%a3%e8%aa%ac%ef%bc%88c%ef%bc%89","status":"publish","type":"post","link":"https:\/\/yorunekomint.com\/?p=221","title":{"rendered":"\u3010\u52d5\u753b\u3042\u308a\u3011AtCoder ABC\u300cA &#8211; Decisive Battle\u300d\u89e3\u8aac\uff08C++\uff09"},"content":{"rendered":"\n<h2 class=\"wp-block-heading jinr-heading d--bold\">\u554f\u984c\u6982\u8981<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u6587\u5b57\u5217 <code>S<\/code> \u306b\u306f <code>E<\/code> \u3068 <code>W<\/code> \u3060\u3051\u304c\u542b\u307e\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list jinr-list\">\n<li><code>E<\/code> \u306e\u500b\u6570 = \u6771\u8ecd\u306e\u4eba\u6570<\/li>\n\n\n\n<li><code>W<\/code> \u306e\u500b\u6570 = \u897f\u8ecd\u306e\u4eba\u6570<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u6771\u8ecd\u306e\u307b\u3046\u304c\u591a\u3051\u308c\u3070 <code>East<\/code>\u3001\u897f\u8ecd\u306e\u307b\u3046\u304c\u591a\u3051\u308c\u3070 <code>West<\/code> \u3092\u51fa\u529b\u3057\u307e\u3059\u3002<br>\uff08\u6587\u5b57\u5217\u306e\u9577\u3055\u306f\u5947\u6570\u306a\u306e\u3067\u3001\u540c\u6570\u306b\u306a\u308b\u3053\u3068\u306f\u3042\u308a\u307e\u305b\u3093\uff09\u001a<br>\u2192 <a href=\"https:\/\/atcoder.jp\/contests\/abc464\/tasks\/abc464_a\">https:\/\/atcoder.jp\/contests\/abc464\/tasks\/abc464_a<\/a><\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"\u3010\u7af6\u30d7\u30edC++\u89e3\u8aac\u3011if\u6587\u3068for\u6587\u3067\u89e3\u3051\u308b\u305e\uff01\uff01\uff01\uff01\uff01\u3010AtCoder Beginner Contest 464 A - Decisive Battle\u3011\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/hZUOph07fB4?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u89e3\u8aac\u52d5\u753b\u306fYouTube\u306b\u6295\u7a3f\u3057\u3066\u3042\u308a\u307e\u3059\uff01<\/p>\n\n\n\n<h3 class=\"wp-block-heading jinr-heading d--bold\">\u65b9\u91dd<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><code>E<\/code> \u306e\u6570\u3060\u3051\u6570\u3048\u308c\u3070\u5341\u5206\u3067\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list jinr-list\">\n<li><code>n<\/code> \u306f\u5947\u6570\u306a\u306e\u3067\u3001<strong><code>east\u306e\u7dcf\u6570 > n\/2<\/code> \u306a\u3089\u6771\u8ecd\u304c\u591a\u3044<\/strong>\uff08\u6574\u6570\u9664\u7b97\u3067OK\uff09<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u3064\u307e\u308a\u3001<\/p>\n\n\n\n<ul class=\"wp-block-list jinr-list\">\n<li><code>east > n\/2<\/code> \u2192 <code>East<\/code><\/li>\n\n\n\n<li>\u305d\u308c\u4ee5\u5916 \u2192 <code>West<\/code><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading jinr-heading d--bold\">C++ \u89e3\u7b54\u4f8b<\/h2>\n\n\n\n<section class=\"wp-block-jinr-blocks-syntax-hl b--jinr-block b--jinr-highlighter d--highlighter-height-auto t--round\" data-block-id=\"5534d6b3-d604-4def-99b5-3cf914127626\"><pre class=\"language-cpp line-numbers\"><code>#include &lt;iostream>\n#include &lt;string>\n\nusing namespace std;\n\nint main(){\n    string S;\n    cin >> S;\n\n    int east = 0;\n    for(char c : S){\n        if(c == 'E') east++;\n    }\n\n    if(east > (int)S.length() \/ 2) cout &lt;&lt; \"East\";\n    else cout &lt;&lt; \"West\";\n\n    return 0;\n}\n<\/code><\/pre><\/section>\n\n\n\n<h3 class=\"wp-block-heading jinr-heading d--bold\">\u5b9f\u88c5\u306e\u30dd\u30a4\u30f3\u30c8<\/h3>\n\n\n\n<ul class=\"wp-block-list jinr-list\">\n<li><code>for (char c : S)<\/code> \u30671\u6587\u5b57\u305a\u3064\u898b\u3066\u3001<code>c == 'E'<\/code> \u306e\u3068\u304d\u3060\u3051\u30ab\u30a6\u30f3\u30c8\u3057\u307e\u3059<\/li>\n\n\n\n<li><code>S.length()\/2<\/code> \u306f\u6574\u6570\u9664\u7b97\u306a\u306e\u3067\u3001\u5947\u6570\u9577\u306e\u3068\u304d\u300c\u534a\u5206\u3088\u308a\u5927\u304d\u3044\u304b\u300d\u306e\u5224\u5b9a\u306b\u305d\u306e\u307e\u307e\u4f7f\u3048\u307e\u3059<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u554f\u984c\u6982\u8981 \u6587\u5b57\u5217 S \u306b\u306f E \u3068 W \u3060\u3051\u304c\u542b\u307e\u308c\u307e\u3059\u3002 \u6771\u8ecd\u306e\u307b\u3046\u304c\u591a\u3051\u308c\u3070 East\u3001\u897f\u8ecd\u306e\u307b\u3046\u304c\u591a\u3051\u308c\u3070 West \u3092\u51fa\u529b\u3057\u307e\u3059\u3002\uff08\u6587\u5b57\u5217\u306e\u9577\u3055\u306f\u5947\u6570\u306a\u306e\u3067\u3001\u540c\u6570\u306b\u306a\u308b\u3053\u3068\u306f\u3042\u308a\u307e\u305b\u3093\uff09\u001a\u2192 https:\/\/at [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":225,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jinr_url_youtube":"","_jinr_pip_youtube":false,"_jinr_time_youtube":"","_jinr_thumb_youtube":"","_jinr_media_youtube":"","_jinr_category_edit":false,"_jinr_category":"","_jinr_title_display":false,"_jinr_snsbutton_display":false,"_jinr_ads_display":false,"_jinr_thumbnail_display":false,"_jinr_profile_display":false,"_jinr_representations_display":false,"_jinr_relatedpost_display":false,"_jinr_sidebar1col_display":false,"_jinr_sidebar2col_display":false,"_jinr_seotitle_display":"","_jinr_description_display":"","_jinr_keyword_display":"","_jinr_hastag_display":"","_jinr_canonical_display":"","_jinr_noindex_display":false,"_jinr_paidpost":false,"_jinr_paidpost_product_id":"","_jinr_headtag_article":"","_jinr_ogp_image_url":"","_jinr_last_featured_id":0,"footnotes":""},"categories":[17],"tags":[],"class_list":["post-221","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-atcoder"],"views":"7","_links":{"self":[{"href":"https:\/\/yorunekomint.com\/index.php?rest_route=\/wp\/v2\/posts\/221","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/yorunekomint.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/yorunekomint.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/yorunekomint.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/yorunekomint.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=221"}],"version-history":[{"count":4,"href":"https:\/\/yorunekomint.com\/index.php?rest_route=\/wp\/v2\/posts\/221\/revisions"}],"predecessor-version":[{"id":226,"href":"https:\/\/yorunekomint.com\/index.php?rest_route=\/wp\/v2\/posts\/221\/revisions\/226"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/yorunekomint.com\/index.php?rest_route=\/wp\/v2\/media\/225"}],"wp:attachment":[{"href":"https:\/\/yorunekomint.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=221"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/yorunekomint.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=221"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/yorunekomint.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=221"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}