{"id":7436,"date":"2024-03-14T21:42:53","date_gmt":"2024-03-14T12:42:53","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/c%e3%81%aelower_bound%e9%96%a2%e6%95%b0%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9%e3%81%af%e4%bd%95%e3%81%a7%e3%81%99%e3%81%8b%ef%bc%9f\/"},"modified":"2025-08-03T14:35:50","modified_gmt":"2025-08-03T05:35:50","slug":"c%e3%81%aelower_bound%e9%96%a2%e6%95%b0%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9%e3%81%af%e4%bd%95%e3%81%a7%e3%81%99%e3%81%8b%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/c%e3%81%aelower_bound%e9%96%a2%e6%95%b0%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9%e3%81%af%e4%bd%95%e3%81%a7%e3%81%99%e3%81%8b%ef%bc%9f\/","title":{"rendered":"C++ lower_bound\u95a2\u6570\uff1a\u30a4\u30c6\u30ec\u30fc\u30bf\u3067\u4e8c\u5206\u63a2\u7d22\u3010\u5fb9\u5e95\u89e3\u8aac\u3011"},"content":{"rendered":"<p>C++\u306elower_bound\u95a2\u6570\u306f\u3001\u30bd\u30fc\u30c8\u3055\u308c\u305f\u7bc4\u56f2\u3067\u3001\u6307\u5b9a\u3055\u308c\u305f\u5024\u4ee5\u4e0a\u306e\u6700\u521d\u306e\u8981\u7d20\u306e\u4f4d\u7f6e\u3092\u8fd4\u3059\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<\/p>\n<p>\u4ee5\u4e0b\u306flower_bound\u95a2\u6570\u306e\u69cb\u6587\u3067\u3059\uff1a<\/p>\n<pre class=\"post-pre\"><code>std::vector&lt;<span class=\"hljs-type\">int<\/span>&gt;::<span class=\"hljs-function\">iterator <span class=\"hljs-title\">lower_bound<\/span> <span class=\"hljs-params\">(std::vector&lt;<span class=\"hljs-type\">int<\/span>&gt;::iterator first, std::vector&lt;<span class=\"hljs-type\">int<\/span>&gt;::iterator last, <span class=\"hljs-type\">const<\/span> <span class=\"hljs-type\">int<\/span>&amp; val)<\/span><\/span>;\r\n<\/code><\/pre>\n<p>lower_bound \u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u969b\u306f\u3001\u307e\u305a\u3001\u533a\u9593\u304c\u6607\u9806\u306b\u4e26\u3079\u66ff\u3048\u3089\u308c\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u306e\u5f8c\u3001\u95a2\u6570\u306b\u306f\u3001\u533a\u9593\u306e\u958b\u59cb\u4f4d\u7f6e\u3092\u6307\u3059\u30a4\u30c6\u30ec\u30fc\u30bf\u30fc first\u3001\u533a\u9593\u306e\u672b\u5c3e\u4f4d\u7f6e\u3092\u6307\u3059\u30a4\u30c6\u30ec\u30fc\u30bf\u30fc last\u3001\u304a\u3088\u3073\u691c\u7d22\u3059\u308b\u5024 val \u306e3\u3064\u306e\u5f15\u6570\u3092\u6e21\u3059\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u6307\u5b9a\u3055\u308c\u305f\u7bc4\u56f2\u5185\u3067\u3001\u4e0e\u3048\u3089\u308c\u305f\u5024val\u4ee5\u4e0a\u306e\u6700\u521d\u306e\u8981\u7d20\u3092\u691c\u7d22\u3057\u3001\u305d\u306e\u8981\u7d20\u3092\u6307\u3059\u30a4\u30c6\u30ec\u30fc\u30bf\u3092\u8fd4\u3059lower_bound\u95a2\u6570\u3002\u6761\u4ef6\u306b\u5408\u81f4\u3059\u308b\u8981\u7d20\u304c\u898b\u3064\u304b\u3089\u306a\u3044\u5834\u5408\u306f\u3001\u7bc4\u56f2\u306e\u672b\u5c3e\u3092\u6307\u3059\u30a4\u30c6\u30ec\u30fc\u30bflast\u3092\u8fd4\u3059\u3002<\/p>\n<p>\u4ee5\u4e0b\u306f\u3001lower_bound\u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u65b9\u6cd5\u3092\u793a\u3059\u7c21\u5358\u306a\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;iostream&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;vector&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;algorithm&gt;<\/span><\/span>\r\n\r\n<span class=\"hljs-function\"><span class=\"hljs-type\">int<\/span> <span class=\"hljs-title\">main<\/span><span class=\"hljs-params\">()<\/span> <\/span>{\r\n    std::vector&lt;<span class=\"hljs-type\">int<\/span>&gt; vec = {<span class=\"hljs-number\">1<\/span>, <span class=\"hljs-number\">2<\/span>, <span class=\"hljs-number\">3<\/span>, <span class=\"hljs-number\">4<\/span>, <span class=\"hljs-number\">5<\/span>, <span class=\"hljs-number\">6<\/span>, <span class=\"hljs-number\">7<\/span>, <span class=\"hljs-number\">8<\/span>, <span class=\"hljs-number\">9<\/span>};\r\n\r\n    <span class=\"hljs-comment\">\/\/ \u67e5\u627e\u4e0d\u5c0f\u4e8e 5 \u7684\u7b2c\u4e00\u4e2a\u5143\u7d20\u7684\u4f4d\u7f6e<\/span>\r\n    std::vector&lt;<span class=\"hljs-type\">int<\/span>&gt;::iterator it = std::<span class=\"hljs-built_in\">lower_bound<\/span>(vec.<span class=\"hljs-built_in\">begin<\/span>(), vec.<span class=\"hljs-built_in\">end<\/span>(), <span class=\"hljs-number\">5<\/span>);\r\n\r\n    <span class=\"hljs-keyword\">if<\/span> (it != vec.<span class=\"hljs-built_in\">end<\/span>()) {\r\n        std::cout &lt;&lt; <span class=\"hljs-string\">\"\u7b2c\u4e00\u4e2a\u4e0d\u5c0f\u4e8e5\u7684\u5143\u7d20\u4f4d\u7f6e\u4e3a\uff1a\"<\/span> &lt;&lt; std::<span class=\"hljs-built_in\">distance<\/span>(vec.<span class=\"hljs-built_in\">begin<\/span>(), it) &lt;&lt; std::endl;\r\n    } <span class=\"hljs-keyword\">else<\/span> {\r\n        std::cout &lt;&lt; <span class=\"hljs-string\">\"\u672a\u627e\u5230\u7b26\u5408\u6761\u4ef6\u7684\u5143\u7d20\"<\/span> &lt;&lt; std::endl;\r\n    }\r\n\r\n    <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-number\">0<\/span>;\r\n}\r\n<\/code><\/pre>\n<p>\u4e0a\u8a18\u306e\u4f8b\u3067\u306f\u3001lower_bound \u95a2\u6570\u306fvec\u5185\u30675\u4ee5\u4e0a\u306e\u6700\u521d\u306e\u8981\u7d20\u3092\u63a2\u3057\u51fa\u3057\u307e\u3059\u3002vec\u306f\u65e2\u306b\u6607\u9806\u306b\u4e26\u3079\u66ff\u3048\u3089\u308c\u3066\u3044\u308b\u305f\u3081\u3001\u8fd4\u3055\u308c\u308b\u30a4\u30c6\u30ec\u30fc\u30bf\u306f5\u3092\u6307\u3057\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>C++\u306elower_bound\u95a2\u6570\u306f\u3001\u30bd\u30fc\u30c8\u3055\u308c\u305f\u7bc4\u56f2\u3067\u3001\u6307\u5b9a\u3055\u308c\u305f\u5024\u4ee5\u4e0a\u306e\u6700\u521d\u306e\u8981\u7d20\u306e\u4f4d\u7f6e\u3092\u8fd4\u3059\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002 \u4ee5\u4e0b\u306flower_bound\u95a2\u6570\u306e\u69cb\u6587\u3067\u3059\uff1a std::vector&lt;int&gt;::ite [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[85,2752,646,431,2753],"class_list":["post-7436","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-c","tag-lower_bound","tag-stl","tag-431","tag-2753"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>C++ lower_bound\u95a2\u6570\uff1a\u30a4\u30c6\u30ec\u30fc\u30bf\u3067\u4e8c\u5206\u63a2\u7d22\u3010\u5fb9\u5e95\u89e3\u8aac\u3011 - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"C++ 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