{"id":247,"date":"2024-01-13T16:47:19","date_gmt":"2024-01-13T08:47:19","guid":{"rendered":"https:\/\/wangqianming.top\/?p=247"},"modified":"2024-01-13T16:47:19","modified_gmt":"2024-01-13T08:47:19","slug":"%e5%a0%863","status":"publish","type":"post","link":"https:\/\/wangqianming.top\/index.php\/2024\/01\/13\/%e5%a0%863\/","title":{"rendered":"\u58063"},"content":{"rendered":"<h1>\u6570\u636e\u6d41\u7684\u4e2d\u4f4d\u6570<\/h1>\n<p><strong>\u4e2d\u4f4d\u6570<\/strong>\u662f\u6709\u5e8f\u6574\u6570\u5217\u8868\u4e2d\u7684\u4e2d\u95f4\u503c\u3002\u5982\u679c\u5217\u8868\u7684\u5927\u5c0f\u662f\u5076\u6570\uff0c\u5219\u6ca1\u6709\u4e2d\u95f4\u503c\uff0c\u4e2d\u4f4d\u6570\u662f\u4e24\u4e2a\u4e2d\u95f4\u503c\u7684\u5e73\u5747\u503c\u3002<\/p>\n<ul>\n<li>\u4f8b\u5982 <code>arr = [2,3,4]<\/code> \u7684\u4e2d\u4f4d\u6570\u662f <code>3<\/code> \u3002<\/li>\n<li>\u4f8b\u5982 <code>arr = [2,3]<\/code> \u7684\u4e2d\u4f4d\u6570\u662f <code>(2 + 3) \/ 2 = 2.5<\/code> \u3002<\/li>\n<\/ul>\n<p>\u5b9e\u73b0 <code>MedianFinder<\/code> \u7c7b:<\/p>\n<ul>\n<li>\n<p><code>MedianFinder()<\/code> \u521d\u59cb\u5316 <code>MedianFinder<\/code> \u5bf9\u8c61\u3002<\/p>\n<\/li>\n<li>\n<p><code>void addNum(int num)<\/code> \u5c06\u6570\u636e\u6d41\u4e2d\u7684\u6574\u6570 <code>num<\/code> \u6dfb\u52a0\u5230\u6570\u636e\u7ed3\u6784\u4e2d\u3002<\/p>\n<\/li>\n<li>\n<p><code>double findMedian()<\/code> \u8fd4\u56de\u5230\u76ee\u524d\u4e3a\u6b62\u6240\u6709\u5143\u7d20\u7684\u4e2d\u4f4d\u6570\u3002\u4e0e\u5b9e\u9645\u7b54\u6848\u76f8\u5dee <code>10^-5<\/code> \u4ee5\u5185\u7684\u7b54\u6848\u5c06\u88ab\u63a5\u53d7\u3002<\/p>\n<\/li>\n<\/ul>\n<p><strong>\u793a\u4f8b 1\uff1a<\/strong><\/p>\n<blockquote>\n<p><strong>\u8f93\u5165<\/strong><br \/>\n[&quot;MedianFinder&quot;, &quot;addNum&quot;, &quot;addNum&quot;, &quot;findMedian&quot;, &quot;addNum&quot;, &quot;findMedian&quot;]<br \/>\n[[], [1], [2], [], [3], []]<br \/>\n<strong>\u8f93\u51fa<\/strong><br \/>\n[null, null, null, 1.5, null, 2.0]<\/p>\n<p><strong>\u89e3\u91ca<\/strong><br \/>\nMedianFinder medianFinder = new MedianFinder();<br \/>\nmedianFinder.addNum(1);    \/\/ arr = [1]<br \/>\nmedianFinder.addNum(2);    \/\/ arr = [1, 2]<br \/>\nmedianFinder.findMedian(); \/\/ \u8fd4\u56de 1.5 ((1 + 2) \/ 2)<br \/>\nmedianFinder.addNum(3);    \/\/ arr[1, 2, 3]<br \/>\nmedianFinder.findMedian(); \/\/ return 2.0<\/p>\n<\/blockquote>\n<p>\u8fd9\u9053\u9898\u7684\u601d\u8def\u5f88\u7ecf\u5178\uff0c\u5373\u4f7f\u7528\u4e00\u4e2a<code>\u6700\u5927\u5806<\/code>\u7ef4\u62a4\u5c0f\u4e8e\u7b49\u4e8e\u4e2d\u4f4d\u6570\u7684\u6570\uff0c\u7528\u4e00\u4e2a<code>\u6700\u5c0f\u5806<\/code>\u7ef4\u62a4\u5927\u4e8e\u7b49\u4e8e\u4e2d\u4f4d\u6570\u7684\u6570\uff0c\u8fd9\u6837\u5c31\u53ef\u4ee5\u7528<code>O(1)<\/code>\u7684\u65f6\u95f4\u590d\u6742\u5ea6\u6765\u53d6\u5230\u4e2d\u4f4d\u6570\u3002<\/p>\n<pre><code class=\"language-java\">class MedianFinder {\n    PriorityQueue&lt;Integer&gt; queMin;\n    PriorityQueue&lt;Integer&gt; queMax;\n\n    public MedianFinder() {\n        queMin = new PriorityQueue&lt;Integer&gt;((a, b) -&gt; (b - a));\n        queMax = new PriorityQueue&lt;Integer&gt;((a, b) -&gt; (a - b));\n    }\n\n    public void addNum(int num) {\n        if (queMin.isEmpty() || num &lt;= queMin.peek()) {\n            queMin.offer(num);\n            if (queMax.size() + 1 &lt; queMin.size()) {\n                queMax.offer(queMin.poll());\n            }\n        } else {\n            queMax.offer(num);\n            if (queMax.size() &gt; queMin.size()) {\n                queMin.offer(queMax.poll());\n            }\n        }\n    }\n\n    public double findMedian() {\n        if (queMin.size() &gt; queMax.size()) {\n            return queMin.peek();\n        }\n        return (queMin.peek() + queMax.peek()) \/ 2.0;\n    }\n}\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u6570\u636e\u6d41\u7684\u4e2d\u4f4d\u6570 \u4e2d\u4f4d\u6570\u662f\u6709\u5e8f\u6574\u6570\u5217\u8868\u4e2d\u7684\u4e2d\u95f4\u503c\u3002\u5982\u679c\u5217\u8868\u7684\u5927\u5c0f\u662f\u5076\u6570\uff0c\u5219\u6ca1\u6709\u4e2d\u95f4\u503c\uff0c\u4e2d\u4f4d\u6570\u662f\u4e24\u4e2a\u4e2d\u95f4\u503c\u7684\u5e73\u5747\u503c\u3002 \u4f8b\u5982 arr = &#8230;<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[5,26,9],"class_list":["post-247","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-java","tag-26","tag-leetcode"],"_links":{"self":[{"href":"https:\/\/wangqianming.top\/index.php\/wp-json\/wp\/v2\/posts\/247","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wangqianming.top\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wangqianming.top\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wangqianming.top\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/wangqianming.top\/index.php\/wp-json\/wp\/v2\/comments?post=247"}],"version-history":[{"count":1,"href":"https:\/\/wangqianming.top\/index.php\/wp-json\/wp\/v2\/posts\/247\/revisions"}],"predecessor-version":[{"id":248,"href":"https:\/\/wangqianming.top\/index.php\/wp-json\/wp\/v2\/posts\/247\/revisions\/248"}],"wp:attachment":[{"href":"https:\/\/wangqianming.top\/index.php\/wp-json\/wp\/v2\/media?parent=247"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wangqianming.top\/index.php\/wp-json\/wp\/v2\/categories?post=247"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wangqianming.top\/index.php\/wp-json\/wp\/v2\/tags?post=247"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}