{"id":304,"date":"2025-06-27T14:55:00","date_gmt":"2025-06-27T06:55:00","guid":{"rendered":"http:\/\/getzs.online\/?p=304"},"modified":"2025-06-30T22:36:22","modified_gmt":"2025-06-30T14:36:22","slug":"169-%e5%a4%9a%e6%95%b0%e5%85%83%e7%b4%a0","status":"publish","type":"post","link":"https:\/\/hello.getzs.online\/index.php\/2025\/06\/27\/169-%e5%a4%9a%e6%95%b0%e5%85%83%e7%b4%a0\/","title":{"rendered":"169. \u591a\u6570\u5143\u7d20"},"content":{"rendered":"\n<p><a href=\"https:\/\/leetcode.cn\/problems\/majority-element\/\">169. \u591a\u6570\u5143\u7d20<\/a><\/p>\n\n\n\n<p>\u7ed9\u5b9a\u4e00\u4e2a\u5927\u5c0f\u4e3a&nbsp;<code>n<\/code><em>&nbsp;<\/em>\u7684\u6570\u7ec4&nbsp;<code>nums<\/code>&nbsp;\uff0c\u8fd4\u56de\u5176\u4e2d\u7684\u591a\u6570\u5143\u7d20\u3002\u591a\u6570\u5143\u7d20\u662f\u6307\u5728\u6570\u7ec4\u4e2d\u51fa\u73b0\u6b21\u6570&nbsp;<strong>\u5927\u4e8e<\/strong>&nbsp;<code>\u230a n\/2 \u230b<\/code>&nbsp;\u7684\u5143\u7d20\u3002<\/p>\n\n\n\n<p>\u4f60\u53ef\u4ee5\u5047\u8bbe\u6570\u7ec4\u662f\u975e\u7a7a\u7684\uff0c\u5e76\u4e14\u7ed9\u5b9a\u7684\u6570\u7ec4\u603b\u662f\u5b58\u5728\u591a\u6570\u5143\u7d20\u3002<\/p>\n\n\n\n<p><strong>\u793a\u4f8b&nbsp;1\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"><strong>\u8f93\u5165\uff1a<\/strong>nums = [3,2,3]\n<strong>\u8f93\u51fa\uff1a<\/strong>3<\/pre>\n\n\n\n<p><strong>\u793a\u4f8b&nbsp;2\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"><strong>\u8f93\u5165\uff1a<\/strong>nums = [2,2,1,1,1,2,2]\n<strong>\u8f93\u51fa\uff1a<\/strong>2\n<\/pre>\n\n\n\n<p>&nbsp;<strong>\u63d0\u793a\uff1a<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>n == nums.length<\/code><\/li>\n\n\n\n<li><code>1 &lt;= n &lt;= 5 * 10<sup>4<\/sup><\/code><\/li>\n\n\n\n<li><code>-10<sup>9<\/sup> &lt;= nums[i] &lt;= 10<sup>9<\/sup><\/code><\/li>\n<\/ul>\n\n\n\n<p><strong>\u8fdb\u9636\uff1a<\/strong>\u5c1d\u8bd5\u8bbe\u8ba1\u65f6\u95f4\u590d\u6742\u5ea6\u4e3a O(n)\u3001\u7a7a\u95f4\u590d\u6742\u5ea6\u4e3a O(1) \u7684\u7b97\u6cd5\u89e3\u51b3\u6b64\u95ee\u9898\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>    public int majorityElement(int&#91;] nums) {\n        return method1(nums, nums.length);\n    }\n\n    \/**\n     * \u6295\u7968\u7b97\u6cd5\n     * 1 ms\n     * \u590d\u6742\u5ea6O(n)\n     *\/\n    public int method1(int&#91;] nums, int n) {\n        int cache = 0, count = 0;\n        for (int num : nums) {\n            \/\/ \u7531\u4e8e\u4f17\u6570\u8d85\u8fc7\u4e00\u534a\uff0c\u6240\u4ee5\u80af\u5b9a\u6709\u4e00\u4e2a\u9608\u503c\u4e0bcount\u4f1a\u5927\u4e8e0\uff0c\u5bf9\u5e94\u7684\u6570\u5c31\u662f\u4f17\u6570\n            if (count == 0) {\n                cache = num;\n            }\n            count += (num == cache ? 1 : -1);\n        }\n        return cache;\n    }<\/code><\/pre>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>169. \u591a\u6570\u5143\u7d20 \u7ed9\u5b9a\u4e00\u4e2a\u5927\u5c0f\u4e3a&nbsp;n&nbsp;\u7684\u6570\u7ec4&nbsp;nums&nbsp;\uff0c\u8fd4\u56de\u5176\u4e2d\u7684 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7,11],"tags":[],"class_list":["post-304","post","type-post","status-publish","format-standard","hentry","category-leetcode"],"_links":{"self":[{"href":"https:\/\/hello.getzs.online\/index.php\/wp-json\/wp\/v2\/posts\/304","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hello.getzs.online\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hello.getzs.online\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hello.getzs.online\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/hello.getzs.online\/index.php\/wp-json\/wp\/v2\/comments?post=304"}],"version-history":[{"count":1,"href":"https:\/\/hello.getzs.online\/index.php\/wp-json\/wp\/v2\/posts\/304\/revisions"}],"predecessor-version":[{"id":305,"href":"https:\/\/hello.getzs.online\/index.php\/wp-json\/wp\/v2\/posts\/304\/revisions\/305"}],"wp:attachment":[{"href":"https:\/\/hello.getzs.online\/index.php\/wp-json\/wp\/v2\/media?parent=304"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hello.getzs.online\/index.php\/wp-json\/wp\/v2\/categories?post=304"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hello.getzs.online\/index.php\/wp-json\/wp\/v2\/tags?post=304"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}