{"id":97727,"date":"2026-08-30T02:42:20","date_gmt":"2026-08-29T18:42:20","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/97727.html"},"modified":"2026-08-30T02:42:20","modified_gmt":"2026-08-29T18:42:20","slug":"%e4%b8%80%e5%a4%a9%e4%b8%80%e9%81%93%e7%ae%97%e6%b3%95%e9%a2%98%ef%bc%8823%ef%bc%89%ef%bc%9a%e9%93%be%e8%a1%a8%e6%8e%92%e5%ba%8f","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/97727.html","title":{"rendered":"\u4e00\u5929\u4e00\u9053\u7b97\u6cd5\u9898\uff0823\uff09\uff1a\u94fe\u8868\u6392\u5e8f"},"content":{"rendered":"<h3>148. \u6392\u5e8f\u94fe\u8868<\/h3>\n<\/p>\n<h4>\u6587\u7ae0\u76ee\u5f55<\/h4>\n<ul>\n<li>\n<ul>\n<li>[148. \u6392\u5e8f\u94fe\u8868](https:\/\/leetcode.cn\/problems\/sort-list\/)<\/li>\n<li>&#8211; \u63d2\u5165\u6392\u5e8f<\/li>\n<li>&#8211; \u5f52\u5e76\u6392\u5e8f<\/li>\n<li>\u603b\u7ed3<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>\u7ed9\u4f60\u94fe\u8868\u7684\u5934\u7ed3\u70b9 head &#xff0c;\u8bf7\u5c06\u5176\u6309 \u5347\u5e8f \u6392\u5217\u5e76\u8fd4\u56de \u6392\u5e8f\u540e\u7684\u94fe\u8868 \u3002<\/p>\n<p>\u793a\u4f8b 1&#xff1a;<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/08\/20260829184219-6a93280bb0f88.jpg\" alt=\"img\" \/><\/p>\n<p>\u8f93\u5165&#xff1a;head &#061; [4,2,1,3]<br \/>\n\u8f93\u51fa&#xff1a;[1,2,3,4]<\/p>\n<p>\u793a\u4f8b 2&#xff1a;<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/08\/20260829184219-6a93280bd42aa.jpg\" alt=\"img\" \/><\/p>\n<p>\u8f93\u5165&#xff1a;head &#061; [-1,5,3,4,0]<br \/>\n\u8f93\u51fa&#xff1a;[-1,0,3,4,5]<\/p>\n<p>\u793a\u4f8b 3&#xff1a;<\/p>\n<p>\u8f93\u5165&#xff1a;head &#061; []<br \/>\n\u8f93\u51fa&#xff1a;[]<\/p>\n<p>\u601d\u8def<\/p>\n<h3>&#8211; \u63d2\u5165\u6392\u5e8f<\/h3>\n<ul>\n<li>\n<p>\u7a7a\u95f4\u590d\u6742\u5ea6O(1)&#xff0c;\u65f6\u95f4\u590d\u6742\u5ea6O(n<sup>2<\/sup>)<\/p>\n<\/li>\n<li>\n<p>\u7528lastNode\u8bb0\u5f55\u5df2\u6392\u5e8f\u94fe\u8868\u7684\u6700\u540e\u4e00\u4e2a\u8282\u70b9&#xff0c;\u628a\u8be5\u8282\u70b9\u540e\u9762\u7684\u8282\u70b9\u5f53\u505a\u5f85\u6392\u5e8f\u8282\u70b9&#xff0c;\u5f85\u6392\u5e8f\u8282\u70b9\u5728\u6392\u5e8f\u7684\u65f6\u5019\u5148\u8003\u8651\u6781\u7aef\u60c5\u51b5&#xff0c;\u5148\u5bf9\u6bd4lastNode\u8282\u70b9&#xff0c;\u5982\u679c\u5927\u4e8e\u7b49\u4e8elastNode\u8282\u70b9&#xff0c;\u5c31\u76f4\u63a5\u653e\u5728\u8be5\u8282\u70b9\u7684\u540e\u9762&#xff0c;\u5982\u679c\u5c0f\u4e8e\u8be5\u8282\u70b9&#xff0c;\u6211\u4eec\u5c31\u4ece\u5934\u5f00\u59cb\u904d\u5386&#xff08;\u4e00\u5b9a\u8981\u4ecedummy\u54e8\u5175\u8282\u70b9\u5f00\u59cb\u904d\u5386&#xff0c;\u5426\u5219\u5c31\u4f1a\u8df3\u8fc7head&#xff0c;\u5982\u679c\u5c0f\u4e8ehead\u5c31\u4f1a\u51fa\u9519&#xff09;&#xff0c;\u627e\u5230\u5408\u9002\u7684\u4f4d\u7f6e\u4e4b\u540e\u5c31\u53ef\u4ee5\u63d2\u5165\u4e86<\/p>\n<\/li>\n<li> <span class=\"token comment\">\/**<br \/>\n * Definition for singly-linked list.<br \/>\n * type ListNode struct {<br \/>\n *     Val int<br \/>\n *     Next *ListNode<br \/>\n * }<br \/>\n *\/<\/span><br \/>\n<span class=\"token keyword\">func<\/span> <span class=\"token function\">sortList<\/span><span class=\"token punctuation\">(<\/span>head <span class=\"token operator\">*<\/span>ListNode<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">*<\/span>ListNode <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> head <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token boolean\">nil<\/span> <span class=\"token operator\">||<\/span> head<span class=\"token punctuation\">.<\/span>Next <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token boolean\">nil<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> head<br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/\u81f3\u5c11\u6709\u4e24\u4e2a\u8282\u70b9<\/span><br \/>\n    dummy <span class=\"token operator\">:&#061;<\/span> <span class=\"token operator\">&amp;<\/span>ListNode<span class=\"token punctuation\">{<\/span>Next <span class=\"token punctuation\">:<\/span> head<span class=\"token punctuation\">}<\/span><br \/>\n    lastNode <span class=\"token operator\">:&#061;<\/span> head<br \/>\n    cur <span class=\"token operator\">:&#061;<\/span> head<span class=\"token punctuation\">.<\/span>Next<\/p>\n<p>    <span class=\"token keyword\">for<\/span> cur <span class=\"token operator\">!&#061;<\/span> <span class=\"token boolean\">nil<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> cur<span class=\"token punctuation\">.<\/span>Val <span class=\"token operator\">&gt;&#061;<\/span> lastNode<span class=\"token punctuation\">.<\/span>Val <span class=\"token punctuation\">{<\/span><br \/>\n            lastNode <span class=\"token operator\">&#061;<\/span> lastNode<span class=\"token punctuation\">.<\/span>Next<br \/>\n        <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">else<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token comment\">\/\/\u4ece\u5934\u5f00\u59cb\u904d\u5386\u67e5\u627e\u8be5\u8282\u70b9\u5e94\u8be5\u51fa\u73b0\u7684\u4f4d\u7f6e<\/span><br \/>\n            pre <span class=\"token operator\">:&#061;<\/span> dummy<br \/>\n            <span class=\"token keyword\">for<\/span> pre<span class=\"token punctuation\">.<\/span>Next<span class=\"token punctuation\">.<\/span>Val <span class=\"token operator\">&lt;<\/span> cur<span class=\"token punctuation\">.<\/span>Val <span class=\"token punctuation\">{<\/span><br \/>\n                pre <span class=\"token operator\">&#061;<\/span> pre<span class=\"token punctuation\">.<\/span>Next<br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n            <span class=\"token comment\">\/\/\u6b64\u65f6pre.Next.Val &gt;&#061; cur.Val&#xff0c;\u6240\u4ee5\u6b64\u65f6\u7684pre.Next\u7684\u4f4d\u7f6e\u662fcur\u5e94\u8be5\u653e\u7f6e\u7684\u4f4d\u7f6e<\/span><\/p>\n<p>            <span class=\"token comment\">\/\/\u5148\u4fdd\u5b58cur\u540e\u9762\u7684\u8282\u70b9\u653e\u5728lastNode\u540e\u9762<\/span><br \/>\n            lastNode<span class=\"token punctuation\">.<\/span>Next <span class=\"token operator\">&#061;<\/span> cur<span class=\"token punctuation\">.<\/span>Next<br \/>\n            <span class=\"token comment\">\/\/\u628acur\u653e\u5728\u5408\u9002\u7684\u4f4d\u7f6e<\/span><br \/>\n            cur<span class=\"token punctuation\">.<\/span>Next <span class=\"token operator\">&#061;<\/span> pre<span class=\"token punctuation\">.<\/span>Next<br \/>\n            pre<span class=\"token punctuation\">.<\/span>Next <span class=\"token operator\">&#061;<\/span> cur<br \/>\n        <span class=\"token punctuation\">}<\/span><\/p>\n<p>        cur  <span class=\"token operator\">&#061;<\/span> lastNode<span class=\"token punctuation\">.<\/span>Next<br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">return<\/span> dummy<span class=\"token punctuation\">.<\/span>Next<br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<\/li>\n<\/ul>\n<h3>&#8211; \u5f52\u5e76\u6392\u5e8f<\/h3>\n<ul>\n<li>\n<p>\u5148\u6765\u8bb2\u4e00\u4e0b\u5f52\u5e76\u6392\u5e8f\u7684\u601d\u8def<\/p>\n<\/li>\n<li>\n<p>\u6211\u4eec\u5148\u8bf4\u5982\u679c\u4e24\u4e2a\u5347\u5e8f\u7684\u94fe\u8868\u5408\u5e76\u7684\u60c5\u51b5&#xff1a;\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b&#xff0c;\u6211\u4eec\u4f1a\u4f7f\u7528\u4e24\u4e2a\u6307\u9488&#xff0c;\u5206\u522b\u6307\u5411\u4e24\u4e2a\u94fe\u8868\u7684\u6700\u5c0f\u503c&#xff0c;\u7136\u540e\u5224\u65ad\u8c01\u66f4\u5c0f&#xff0c;\u628a\u66f4\u5c0f\u7684\u6302\u5728\u54e8\u5175\u8282\u70b9dummy\u540e\u9762&#xff08;\u5c31\u662f\u65b0\u521b\u5efa\u4e00\u4e2a\u7a7a\u8282\u70b9\u5f53\u5934\u8282\u70b9&#xff09;&#xff0c;\u7136\u540e\u628a\u90a3\u4e2a\u5df2\u7ecf\u6302\u5728dummy\u7684\u90a3\u6bb5\u94fe\u8868\u7684\u6307\u9488\u5411\u540e\u79fb\u52a8\u4e00\u4f4d&#xff0c;\u7ee7\u7eed\u5224\u65ad&#xff0c;\u5c31\u8fd9\u6837\u628a\u4e24\u4e2a\u94fe\u8868\u5408\u5e76\u8d77\u6765\u3002\u5f52\u5e76\u7684\u601d\u8def\u662f\u4e00\u5f00\u59cb\u628a\u4e00\u6bb5\u5b8c\u6574\u7684\u94fe\u8868\u5206\u4e3a\u4e24\u4e2a\u94fe\u8868&#xff0c;\u518d\u5bf9\u6bcf\u4e00\u6bb5\u94fe\u8868\u7ee7\u7eed\u5206\u4e3a\u4e24\u4e2a\u94fe\u8868&#xff0c;\u76f4\u5230\u6bcf\u4e00\u4e2a\u94fe\u8868\u53ea\u6709\u4e24\u4e2a\u8282\u70b9&#xff0c;\u6b64\u65f6\u5bf9\u8fd9\u4e24\u4e2a\u8282\u70b9\u6392\u5e8f&#xff0c;\u7136\u540e\u8fd4\u56de&#xff0c;\u4e4b\u540e\u5c31\u4f1a\u5bf9\u4e24\u7ec4\u5404\u4e24\u4e2a\u8282\u70b9\u7684\u94fe\u8868\u6392\u5e8f&#xff0c;\u7136\u540e\u5c31\u4f1a\u5bf9\u4e24\u7ec4\u54044\u4e2a\u8282\u70b9\u7684\u94fe\u8868\u6392\u5e8f&#xff0c;\u5c31\u8fd9\u6837\u56de\u6eaf\u56de\u53bb&#xff08;\u4e0d\u8fc7\u5c31\u7b97\u5de6\u53f3\u4e24\u8fb9\u957f\u5ea6\u4e0d\u4e00\u6837\u4e5f\u65e0\u6240\u8c13&#xff09;&#xff0c;\u6700\u540e\u5c31\u6392\u5e8f\u597d\u4e86<\/p>\n<\/li>\n<li>\n<p>\u8fd9\u91cc\u4f7f\u7528\u9012\u5f52\u7684\u65b9\u6cd5&#xff0c;\u7ed3\u675f\u7684\u6761\u4ef6\u662f\u94fe\u8868\u957f\u5ea6\u5c0f\u4e8e\u7b49\u4e8e1<\/p>\n<\/li>\n<li> <span class=\"token comment\">\/**<br \/>\n * Definition for singly-linked list.<br \/>\n * type ListNode struct {<br \/>\n *     Val int<br \/>\n *     Next *ListNode<br \/>\n * }<br \/>\n *\/<\/span><br \/>\n<span class=\"token keyword\">func<\/span> <span class=\"token function\">sortList<\/span><span class=\"token punctuation\">(<\/span>head <span class=\"token operator\">*<\/span>ListNode<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">*<\/span>ListNode <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> head <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token boolean\">nil<\/span> <span class=\"token operator\">||<\/span> head<span class=\"token punctuation\">.<\/span>Next <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token boolean\">nil<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> head<br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/\u5feb\u6162\u6307\u9488\u627e\u4e2d\u70b9<\/span><br \/>\n    <span class=\"token comment\">\/\/\u5feb\u6307\u9488\u4e00\u5b9a\u8981\u4ecehead.Next\u5f00\u59cb\u67e5\u627e&#xff0c;\u8fd9\u6837\u5f53\u94fe\u8868\u957f\u5ea6\u4e3a\u5076\u6570\u7684\u65f6\u5019slow\u505c\u5728\u7684\u662f\u5de6\u8fb9\u7684\u6700\u540e\u4e00\u4e2a\u4f4d\u7f6e&#xff0c;\u5947\u6570\u662f\u521a\u597d\u5728\u4e2d\u95f4\u4f4d\u7f6e<\/span><br \/>\n    fast<span class=\"token punctuation\">,<\/span> slow <span class=\"token operator\">:&#061;<\/span> head<span class=\"token punctuation\">.<\/span>Next<span class=\"token punctuation\">,<\/span> head<br \/>\n    <span class=\"token keyword\">for<\/span> fast <span class=\"token operator\">!&#061;<\/span> <span class=\"token boolean\">nil<\/span> <span class=\"token operator\">&amp;&amp;<\/span> fast<span class=\"token punctuation\">.<\/span>Next <span class=\"token operator\">!&#061;<\/span> <span class=\"token boolean\">nil<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        fast <span class=\"token operator\">&#061;<\/span> fast<span class=\"token punctuation\">.<\/span>Next<span class=\"token punctuation\">.<\/span>Next<br \/>\n        slow  <span class=\"token operator\">&#061;<\/span> slow<span class=\"token punctuation\">.<\/span>Next<br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    mid <span class=\"token operator\">:&#061;<\/span> slow<span class=\"token punctuation\">.<\/span>Next<br \/>\n    slow<span class=\"token punctuation\">.<\/span>Next <span class=\"token operator\">&#061;<\/span> <span class=\"token boolean\">nil<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/3.\u9012\u5f52\u6392\u5e8f\u5de6\u53f3<\/span><br \/>\n    l <span class=\"token operator\">:&#061;<\/span> <span class=\"token function\">sortList<\/span><span class=\"token punctuation\">(<\/span>head<span class=\"token punctuation\">)<\/span><br \/>\n    r <span class=\"token operator\">:&#061;<\/span> <span class=\"token function\">sortList<\/span><span class=\"token punctuation\">(<\/span>mid<span class=\"token punctuation\">)<\/span><\/p>\n<p>    <span class=\"token keyword\">return<\/span> <span class=\"token function\">merge<\/span><span class=\"token punctuation\">(<\/span>l<span class=\"token punctuation\">,<\/span> r<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">func<\/span> <span class=\"token function\">merge<\/span><span class=\"token punctuation\">(<\/span>l<span class=\"token punctuation\">,<\/span> r <span class=\"token operator\">*<\/span>ListNode<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">*<\/span>ListNode <span class=\"token punctuation\">{<\/span><br \/>\n    dummy <span class=\"token operator\">:&#061;<\/span> <span class=\"token operator\">&amp;<\/span>ListNode<span class=\"token punctuation\">{<\/span><span class=\"token punctuation\">}<\/span><br \/>\n    cur <span class=\"token operator\">:&#061;<\/span> dummy<br \/>\n<span class=\"token comment\">\/\/\u56e0\u4e3a\u8fdb\u5165\u6392\u5e8f\u7684\u94fe\u957f\u5ea6\u4e0d\u4e00\u81f4&#xff0c;\u6240\u4ee5\u4f7f\u7528for\u5faa\u73af\u4e00\u4e2a\u4e00\u4e2a\u6392\u5e8f&#xff0c;\u76f4\u5230\u6709\u4e00\u4e2a\u94fe\u8868\u6392\u7a7a&#xff0c;\u90a3\u5269\u4e0b\u7684\u94fe\u8868\u7684\u6bcf\u4e00\u4e2a\u503c\u90fd\u6bd4\u88ab\u6392\u7a7a\u94fe\u8868\u7684\u6700\u5927\u503c\u66f4\u5927&#xff0c;\u76f4\u63a5\u6302\u5728\u94fe\u8868\u6700\u540e\u9762\u5c31\u884c\u4e86<\/span><br \/>\n    <span class=\"token keyword\">for<\/span> l <span class=\"token operator\">!&#061;<\/span> <span class=\"token boolean\">nil<\/span> <span class=\"token operator\">&amp;&amp;<\/span> r <span class=\"token operator\">!&#061;<\/span> <span class=\"token boolean\">nil<\/span> <span class=\"token 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