{"id":101405,"date":"2026-09-06T19:57:03","date_gmt":"2026-09-06T11:57:03","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/101405.html"},"modified":"2026-09-06T19:57:03","modified_gmt":"2026-09-06T11:57:03","slug":"%e4%b8%80%e5%a4%a9%e4%b8%80%e9%81%93%e7%ae%97%e6%b3%95%e9%a2%98%ef%bc%8828%ef%bc%89%ef%bc%9a%e5%ad%97%e7%ac%a6%e4%b8%b2%e8%a7%a3%e7%a0%81%ef%bc%88%e6%a0%88%ef%bc%89","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/101405.html","title":{"rendered":"\u4e00\u5929\u4e00\u9053\u7b97\u6cd5\u9898\uff0828\uff09\uff1a\u5b57\u7b26\u4e32\u89e3\u7801\uff08\u6808\uff09"},"content":{"rendered":"<h2>394. \u5b57\u7b26\u4e32\u89e3\u7801<\/h2>\n<\/p>\n<h4>\u6587\u7ae0\u76ee\u5f55<\/h4>\n<ul>\n<li>[394. \u5b57\u7b26\u4e32\u89e3\u7801](https:\/\/leetcode.cn\/problems\/decode-string\/)<\/li>\n<li>\n<ul>\n<li>&#061;&#061;\u601d\u8def&#061;&#061;<\/li>\n<li>\n<ul>\n<li>&#8211; \u5355\u6808\u7248<\/li>\n<li>&#8211; \u53cc\u6808\u7248\u601d\u8def<\/li>\n<\/ul>\n<\/li>\n<li>\u7ed3\u8bed<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>\u7ed9\u5b9a\u4e00\u4e2a\u7ecf\u8fc7\u7f16\u7801\u7684\u5b57\u7b26\u4e32&#xff0c;\u8fd4\u56de\u5b83\u89e3\u7801\u540e\u7684\u5b57\u7b26\u4e32\u3002<\/p>\n<p>\u7f16\u7801\u89c4\u5219\u4e3a: k[encoded_string]&#xff0c;\u8868\u793a\u5176\u4e2d\u65b9\u62ec\u53f7\u5185\u90e8\u7684 encoded_string \u6b63\u597d\u91cd\u590d k \u6b21\u3002\u6ce8\u610f k \u4fdd\u8bc1\u4e3a\u6b63\u6574\u6570\u3002<\/p>\n<p>\u4f60\u53ef\u4ee5\u8ba4\u4e3a\u8f93\u5165\u5b57\u7b26\u4e32\u603b\u662f\u6709\u6548\u7684&#xff1b;\u8f93\u5165\u5b57\u7b26\u4e32\u4e2d\u6ca1\u6709\u989d\u5916\u7684\u7a7a\u683c&#xff0c;\u4e14\u8f93\u5165\u7684\u65b9\u62ec\u53f7\u603b\u662f\u7b26\u5408\u683c\u5f0f\u8981\u6c42\u7684\u3002<\/p>\n<p>\u6b64\u5916&#xff0c;\u4f60\u53ef\u4ee5\u8ba4\u4e3a\u539f\u59cb\u6570\u636e\u4e0d\u5305\u542b\u6570\u5b57&#xff0c;\u6240\u6709\u7684\u6570\u5b57\u53ea\u8868\u793a\u91cd\u590d\u7684\u6b21\u6570 k &#xff0c;\u4f8b\u5982\u4e0d\u4f1a\u51fa\u73b0\u50cf 3a \u6216 2[4] \u7684\u8f93\u5165\u3002<\/p>\n<p>\u6d4b\u8bd5\u7528\u4f8b\u4fdd\u8bc1\u8f93\u51fa\u7684\u957f\u5ea6\u4e0d\u4f1a\u8d85\u8fc7 105\u3002<\/p>\n<p>\u793a\u4f8b 1&#xff1a;<\/p>\n<p>\u8f93\u5165&#xff1a;s &#061; &#034;3[a]2[bc]&#034;<br \/>\n\u8f93\u51fa&#xff1a;&#034;aaabcbc&#034;<\/p>\n<p>\u793a\u4f8b 2&#xff1a;<\/p>\n<p>\u8f93\u5165&#xff1a;s &#061; &#034;3[a2[c]]&#034;<br \/>\n\u8f93\u51fa&#xff1a;&#034;accaccacc&#034;<\/p>\n<p>\u793a\u4f8b 3&#xff1a;<\/p>\n<p>\u8f93\u5165&#xff1a;s &#061; &#034;2[abc]3[cd]ef&#034;<br \/>\n\u8f93\u51fa&#xff1a;&#034;abcabccdcdcdef&#034;<\/p>\n<p>\u793a\u4f8b 4&#xff1a;<\/p>\n<p>\u8f93\u5165&#xff1a;s &#061; &#034;abc3[cd]xyz&#034;<br \/>\n\u8f93\u51fa&#xff1a;&#034;abccdcdcdxyz&#034;<\/p>\n<p>\u63d0\u793a&#xff1a;<\/p>\n<ul>\n<li>1 &lt;&#061; s.length &lt;&#061; 30<\/li>\n<li>s \u7531\u5c0f\u5199\u82f1\u6587\u5b57\u6bcd\u3001\u6570\u5b57\u548c\u65b9\u62ec\u53f7 &#039;[]&#039; \u7ec4\u6210<\/li>\n<li>s \u4fdd\u8bc1\u662f\u4e00\u4e2a \u6709\u6548 \u7684\u8f93\u5165\u3002<\/li>\n<li>s \u4e2d\u6240\u6709\u6574\u6570\u7684\u53d6\u503c\u8303\u56f4\u4e3a [1, 300]<\/li>\n<\/ul>\n<h3>\u601d\u8def<\/h3>\n<ul>\n<li>\u8fd9\u91cc\u7684\u4ee3\u7801\u5927\u5bb6\u5176\u5b9e\u4e5f\u6ca1\u5565\u597d\u770b\u7684&#xff0c;\u56e0\u4e3a\u6211\u5199\u7684\u592a\u5783\u573e\u4e86&#xff0c;\u5199\u7684\u6709\u4e9b\u5570\u55e6&#xff0c;\u4e3b\u8981\u662f\u7ed9\u5927\u5bb6\u63d0\u4f9b\u601d\u8def&#xff0c;\u7136\u540e\u5199\u51fa\u66f4\u597d\u7684\u4ee3\u7801<\/li>\n<\/ul>\n<h4>&#8211; \u5355\u6808\u7248<\/h4>\n<ul>\n<li>\n<p>\u7ed9\u5927\u5bb6\u4e00\u4e2a\u56fe&#xff0c;\u5927\u5bb6\u6765\u8ddf\u7740\u601d\u8003<\/p>\n<li>\u5f53\u5f53\u524d\u7684\u5143\u7d20\u4e0d\u662f\u201c]\u201d\u7684\u65f6\u5019&#xff0c;\u5c31\u4e00\u76f4\u538b\u6808<\/li>\n<li>\u9047\u5230\u201c]\u201d\u7684\u65f6\u5019&#xff0c;\u53d6\u51fa\u201c\u3010\u3011\u201d\u4e4b\u95f4\u7684\u5b57\u7b26\u4e32<\/li>\n<li>\u53d6\u51fa\u5b8c\u5b57\u7b26\u4e32\u4e4b\u540e\u5bf9\u201c[\u201d\u4e5f\u51fa\u6808&#xff0c;\u7136\u540e\u51fa\u6808\u6570\u5b57&#xff0c;\u53d6\u51fa\u6570\u5b57<\/li>\n<li>\u6839\u636e\u8be5\u6570\u5b57\u518d\u6b21\u538b\u6808number\u6b21\u8fde\u7eed\u5b57\u7b26\u4e32<\/li>\n<li>\u5faa\u73af\u81f3s\u5b57\u7b26\u4e32\u904d\u5386\u7ed3\u675f&#xff0c;\u6b64\u65f6stack&#xff08;\u6808&#xff09;\u91cc\u9762\u5c31\u662f\u7b54\u6848&#xff0c;\u505a\u4e00\u4e2a\u7c7b\u578b\u8f6c\u6362\u4e4b\u540e\u5c31\u53ef\u4ee5\u8fd4\u56de\u7b54\u6848\u4e86<\/li>\n<\/li>\n<li>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/09\/20260906115701-6a9d550dd1c28.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<\/li>\n<\/ul>\n<h4>&#8211; \u53cc\u6808\u7248\u601d\u8def<\/h4>\n<ul>\n<li>\n<p>\u4e0a\u9762\u8fd9\u4e2a\u662f\u5355\u6808\u7248\u672c&#xff0c;\u8fd8\u6709\u53cc\u6808\u7248\u672c\u3002\u6211\u4eec\u53ef\u4ee5\u5b58\u5728\u4e24\u4e2a\u6808&#xff0c;\u4e00\u4e2a\u662f\u6570\u5b57\u6808&#xff0c;\u4e13\u95e8\u653e\u6570\u5b57&#xff0c;\u4e00\u4e2a\u662f\u5b57\u7b26\u6808&#xff0c;\u653e\u201c[ ]\u201d\u548c\u5b57\u7b26\u4e32&#xff0c;\u538b\u6808\u548c\u51fa\u6808\u6ca1\u5565\u96be\u70b9&#xff0c;\u4f46\u662f\u6709\u4e00\u4e2a\u8981\u601d\u8003\u7684\u662f\u600e\u4e48\u5904\u7406\u6570\u5b57\u6808&#xff0c;\u56e0\u4e3a\u8fd9\u9053\u9898\u7684\u6570\u5b57\u4e0d\u53ea\u662f\u5355\u4f4d\u6570&#xff0c;\u6839\u636e\u9898\u76ee\u8bf4\u660e&#xff0c;\u8fd9\u9053\u9898\u7684\u6574\u6570\u8303\u56f4\u662f1~300&#xff0c;\u6240\u4ee5\u6211\u4eec\u5fc5\u987b\u7528\u4e00\u4e2a\u5206\u9694\u7b26\u786e\u5b9a\u6bcf\u4e00\u6b21\u8981\u53d6\u51fa\u7684\u6570\u5b57\u662f\u4ec0\u4e48&#xff0c;\u8fd9\u91cc\u6211\u7ed9\u51fa\u7684\u89e3\u51b3\u65b9\u6848\u662f\u5728\u904d\u5386\u5230\u201c[\u201d\u7684\u65f6\u5019\u7ed9\u6570\u5b57\u6808\u538b\u51650&#xff0c;\u4f5c\u4e3a\u5206\u5272\u7b26&#xff0c;\u4ee3\u7801\u7684\u8bdd\u5c31\u8bf7\u5927\u5bb6\u81ea\u884c\u601d\u8003\u5427<\/p>\n<\/li>\n<li>\n<p>\u5355\u6808\u7248\u672c\u4ee3\u7801\u5c55\u793a<\/p>\n<p> <span class=\"token keyword\">func<\/span> <span class=\"token function\">decodeString<\/span><span class=\"token punctuation\">(<\/span>s <span class=\"token builtin\">string<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token builtin\">string<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    stack <span class=\"token operator\">:&#061;<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><span class=\"token builtin\">rune<\/span><span class=\"token punctuation\">{<\/span><span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">for<\/span> <span class=\"token boolean\">_<\/span><span class=\"token punctuation\">,<\/span> v <span class=\"token operator\">:&#061;<\/span> <span class=\"token keyword\">range<\/span> s <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> v <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token char\">&#039;]&#039;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">var<\/span> str <span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><span class=\"token builtin\">rune<\/span><br \/>\n            <span class=\"token keyword\">var<\/span> num <span class=\"token builtin\">int<\/span><br \/>\n            <span class=\"token comment\">\/\/\u53d6\u51fa\u8fde\u7eed\u5b57\u7b26<\/span><br \/>\n            str<span class=\"token punctuation\">,<\/span> stack <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">popStr<\/span><span class=\"token punctuation\">(<\/span>stack<span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token comment\">\/\/\u53d6\u51fa\u8fde\u7eed\u6570\u5b57<\/span><br \/>\n            num<span class=\"token punctuation\">,<\/span> stack <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">popInt<\/span><span class=\"token punctuation\">(<\/span>stack<span class=\"token punctuation\">)<\/span><\/p>\n<p>            <span class=\"token keyword\">for<\/span> i <span class=\"token operator\">:&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> num<span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">&#043;&#043;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token comment\">\/\/\u5faa\u73afnum\u6b21\u518d\u6b21\u538b\u6808<\/span><br \/>\n                stack <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">append<\/span><span class=\"token punctuation\">(<\/span>stack<span class=\"token punctuation\">,<\/span> str<span class=\"token operator\">&#8230;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">else<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token comment\">\/\/\u5982\u679c\u4e0d\u662f&#034;]&#034;\u5c31\u538b\u6808<\/span><br \/>\n            stack <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">append<\/span><span class=\"token punctuation\">(<\/span>stack<span class=\"token punctuation\">,<\/span> v<span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">return<\/span> <span class=\"token function\">string<\/span><span class=\"token punctuation\">(<\/span>stack<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\">popInt<\/span><span class=\"token punctuation\">(<\/span>stack <span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><span class=\"token builtin\">rune<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token builtin\">int<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><span class=\"token builtin\">rune<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token comment\">\/\/ \u4ece\u540e\u5f80\u524d\u6536\u96c6\u6570\u5b57<\/span><br \/>\n    digits <span class=\"token operator\">:&#061;<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><span class=\"token builtin\">rune<\/span><span class=\"token punctuation\">{<\/span><span class=\"token punctuation\">}<\/span><br \/>\n    i <span class=\"token operator\">:&#061;<\/span> <span class=\"token function\">len<\/span><span class=\"token punctuation\">(<\/span>stack<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#8211;<\/span> <span class=\"token number\">1<\/span><br \/>\n    <span class=\"token keyword\">for<\/span> i <span class=\"token operator\">&gt;&#061;<\/span> <span class=\"token number\">0<\/span> <span class=\"token operator\">&amp;&amp;<\/span> stack<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&gt;&#061;<\/span> <span class=\"token char\">&#039;0&#039;<\/span> <span class=\"token operator\">&amp;&amp;<\/span> stack<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&lt;&#061;<\/span> <span class=\"token char\">&#039;9&#039;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        digits <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">append<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><span class=\"token builtin\">rune<\/span><span class=\"token punctuation\">{<\/span>stack<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span> digits<span class=\"token operator\">&#8230;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        i<span class=\"token operator\">&#8212;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    num<span class=\"token punctuation\">,<\/span> <span class=\"token boolean\">_<\/span> <span class=\"token operator\">:&#061;<\/span> strconv<span class=\"token punctuation\">.<\/span><span class=\"token function\">Atoi<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">string<\/span><span class=\"token punctuation\">(<\/span>digits<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> num<span class=\"token punctuation\">,<\/span> stack<span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">:<\/span><span class=\"token function\">len<\/span><span class=\"token punctuation\">(<\/span>stack<span class=\"token punctuation\">)<\/span><span class=\"token operator\">&#8211;<\/span><span class=\"token function\">len<\/span><span class=\"token punctuation\">(<\/span>digits<span class=\"token punctuation\">)<\/span><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\">popStr<\/span><span class=\"token punctuation\">(<\/span>stack <span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><span class=\"token builtin\">rune<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><span class=\"token builtin\">rune<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><span class=\"token builtin\">rune<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token comment\">\/\/\u4ece\u540e\u5f80\u524d\u6536\u96c6\u5b57\u7b26\u4e32<\/span><br \/>\n    chars <span class=\"token operator\">:&#061;<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><span class=\"token builtin\">rune<\/span><span class=\"token punctuation\">{<\/span><span class=\"token punctuation\">}<\/span><\/p>\n<p>    i <span class=\"token operator\">:&#061;<\/span> <span class=\"token function\">len<\/span><span class=\"token punctuation\">(<\/span>stack<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#8211;<\/span> <span class=\"token number\">1<\/span><br \/>\n    <span class=\"token keyword\">for<\/span> i <span class=\"token operator\">&gt;&#061;<\/span> <span class=\"token number\">0<\/span> <span class=\"token operator\">&amp;&amp;<\/span> stack<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">!&#061;<\/span> <span class=\"token char\">&#039;[&#039;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        chars <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">append<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><span class=\"token builtin\">rune<\/span><span class=\"token punctuation\">{<\/span>stack<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token 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