{"id":532,"date":"2021-10-21T03:10:17","date_gmt":"2021-10-20T19:10:17","guid":{"rendered":"https:\/\/blog.cauchyschwarz.com\/?p=532"},"modified":"2021-10-23T12:05:33","modified_gmt":"2021-10-23T04:05:33","slug":"%e6%b1%82%e9%80%86%e5%ba%8f%e6%95%b0","status":"publish","type":"post","link":"https:\/\/blog.cauchyschwarz.com\/?p=532","title":{"rendered":"\u6c42\u9006\u5e8f\u6570"},"content":{"rendered":"\n<p><a href=\"https:\/\/www.hackerrank.com\/challenges\/new-year-chaos\/problem?h_l=interview&amp;playlist_slugs%5B%5D=interview-preparation-kit&amp;playlist_slugs%5B%5D=arrays\" data-type=\"URL\" data-id=\"https:\/\/www.hackerrank.com\/challenges\/new-year-chaos\/problem?h_l=interview&amp;playlist_slugs%5B%5D=interview-preparation-kit&amp;playlist_slugs%5B%5D=arrays\">\u9898\u76ee<\/a><\/p>\n\n\n\n<p>\u9898\u610f\u7406\u89e3\uff1a\u5bf9\u4e8e\u4e00\u4e2a\u4ece1\u5230n\u7684\u6709\u5e8f\u6570\u7ec4\uff0c\u6bcf\u4e2a\u4f4d\u7f6e\u4e0a\u7684\u5143\u7d20\u53ef\u4ee5\u548c\u4f4d\u4e8e\u5b83\u524d\u9762\u7684\u5143\u7d20\u4ea4\u6362\u4e00\u6b21\uff0c\u6bcf\u4e2a\u5143\u7d20\u6700\u591a\u53ef\u4ee5\u67092\u6b21\u8fd9\u6837\u5411\u524d\u4ea4\u6362\u7684\u673a\u4f1a\uff0c\u95ee\u5bf9\u4e8e\u8f93\u5165\u7684\u6570\u7ec4\u6392\u5217\u662f\u5426\u53ef\u4ee5\u901a\u8fc7\u8fd9\u6837\u7684\u64cd\u4f5c\u5f97\u5230\uff0c\u5982\u679c\u53ef\u4ee5\u5f97\u5230\uff0c\u6700\u5c11\u9700\u8981\u591a\u5c11\u6b21\u8fd9\u6837\u7684\u4ea4\u6362\u64cd\u4f5c\u3002<\/p>\n\n\n\n<p>\u5206\u6790\uff1a\u521d\u59cb\u72b6\u6001\u4e0b\uff0c\u4ece1\u5230n\u7684\u6709\u5e8f\u6570\u7ec4\u662f\u6ca1\u6709\u9006\u5e8f\u5bf9\u7684\uff0c\u4e4b\u540e\u4e3a\u4e86\u5f62\u6210\u8f93\u5165\u7684a[0]\uff0ca[1]\uff0c&#8230;\uff0ca[n-1]\u8fd9\u6837\u7684\u6392\u5217\uff0c\u4ecea[0]\u5f00\u59cb\u770b\uff0ca[0]\u540e\u9762\u6709\u591a\u5c11\u4e2a\u6bd4a[0]\u5c0f\u7684\u5143\u7d20\uff0ca[0]\u5c31\u5fc5\u987b\u5f97\u5411\u524d\u4ea4\u6362\u591a\u5c11\u6b21\u624d\u80fd\u5230\u8fbe\u5f53\u524d\u4f4d\u7f6e(\u5728a[0]\u540e\u9762\u7684\uff0c\u4e14\u6bd4a[0]\u5927\u7684\uff0c\u672c\u6765\u4ece\u521d\u59cb\u72b6\u6001\u5f00\u59cb\u5c31\u6392\u5728a[0]\u540e\u9762\uff0c\u6839\u672c\u4e0d\u9700\u8981a[0]\u548c\u4ed6\u4eec\u53bb\u4ea4\u6362)\u3002\u800c\u4f4d\u4e8ea[0]\u540e\u9762\u4e14\u6bd4a[0]\u5c0f\u7684\u5143\u7d20\u4e2a\u6570\u5176\u5b9e\u5c31\u662f\u8f93\u5165\u6392\u5217\u4ecea[0]\u5f00\u59cb\u7b97\u7684\u9006\u5e8f\u6570\u3002\u540c\u6837\u7684\u5bf9a[1]\uff0ca[2]\uff0c&#8230;\uff0ca[n-1]\u4e5f\u90fd\u662f\u5982\u6b64\uff0c\u4ed6\u4eec\u9700\u8981\u5411\u524d\u4ea4\u6362\u7684\u6b21\u6570\u90fd\u662f\u5404\u81ea\u7684\u9006\u5e8f\u6570\u3002\u56e0\u6b64\u5bf9\u4e8e\u8f93\u5165\u7684\u6570\u7ec4\u6392\u5217\uff0c\u5176\u9006\u5e8f\u4e2a\u6570\u5c31\u662f\u4ece\u6709\u5e8f\u6570\u7ec4\u53d8\u4e3a\u8fd9\u4e2a\u6392\u5217\u9700\u8981\u7684\u4ea4\u6362\u6b21\u6570\u3002<\/p>\n\n\n\n<p>\u53ea\u662f\u8fd9\u4e2a\u9898\u76ee\u989d\u5916\u591a\u4e861\u4e2a\u9650\u5236\uff0c\u90a3\u5c31\u662f\u8981\u6c42\u5bf9\u4e8e\u8f93\u5165\u7684\u6392\u5217\u4e2d\u7684\u6bcf\u4e2aa[i]\uff0c\u4f4d\u4e8e\u5176\u540e\u7684a[i+1]\uff0ca[i+2]\uff0c&#8230;\uff0ca[n-1]\u4e2d\u5c0f\u4e8ea[i]\u7684\u4e0d\u80fd\u8d85\u8fc72\u4e2a\uff0c\u4e5f\u5c31\u662fa[i]\u6700\u591a\u662f\u7ecf\u8fc7\u4e24\u6b21\u5411\u524d\u4ea4\u6362\u5230\u8fbe\u5f53\u524d\u4f4d\u7f6e\u7684(\u4f46\u662fa[i]\u662f\u53ef\u4ee5\u7ecf\u8fc7\u8d85\u8fc72\u6b21\u5411\u540e\u4ea4\u6362\u5230\u8fbe\u5f53\u524d\u4f4d\u7f6e\uff0c\u6bd4\u5982\u8f93\u5165\u6392\u5217\u662f2\uff0c3\uff0c&#8230;\uff0cn-1\uff0c1\u7684\u8bdd\uff0c\u90a3\u4e481\u5c31\u662f\u7ecf\u8fc7n-1\u6b21\u5411\u540e\u4ea4\u6362\u5230\u8fbe\u4e86\u6700\u540e\u4e00\u4e2a\u4f4d\u7f6e)\u3002<\/p>\n\n\n\n<p>\u6240\u4ee5\uff0c\u6309\u7167\u7edf\u8ba1\u9006\u5e8f\u6570\u7684\u601d\u8def\u6765\u5199\uff0c\u53ef\u4ee5\u8fd9\u6837\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>void minimumBribes(vector&lt;int&gt; q) {\n    int swap = 0;\n    int len = q.size();\n    for (int i = 0; i &lt; len; i++) {\n        int innerSwap = 0;\n        for (int j = i + 1; j &lt; len; j++) {\n            if (q&#91;i] &gt; q&#91;j]) {\n                ++innerSwap;\n                ++swap;\n            }\n            if (innerSwap &gt; 2) {\n                cout &lt;&lt; \"Too chaotic\" &lt;&lt; endl;\n                return;\n            }\n        }\n    }\n    cout &lt;&lt; swap &lt;&lt; endl;\n}<\/code><\/pre>\n\n\n\n<p>\u4f46\u662f\u8fd9\u6837\u4f1a\u8d85\u65f6\u3002\u770b\u4e86\u8ba8\u8bba\u533a\u7684\u56de\u7b54\uff0c\u624d\u660e\u767d\u53ef\u4ee5\u6839\u636e\u6bcf\u4e2a\u5143\u7d20\u53ef\u4ee5\u6700\u591a\u5411\u524d\u4ea4\u63622\u6b21\u8fdb\u884c\u4f18\u5316\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>\u5bf9\u4e8e\u8f93\u5165\u7684\u6392\u5217a[0]\uff0ca[1]\uff0c&#8230;\uff0ca[n-1]\u4e2d\u7684a[k]\uff0ca[k]\u6700\u591a\u7ecf\u5386\u8fc72\u6b21\u5411\u524d\u4ea4\u6362\u6765\u5230\u5f53\u524d\u4f4d\u7f6e\uff0c\u6240\u4ee5a[k]\u6700\u591a\u662f(k+1)+2\u4ea4\u6362\u4e0a\u6765\u7684\uff0c(k+1)\u662f\u56e0\u4e3a\u521d\u59cb\u72b6\u6001\u4e0b\u7d22\u5f15\u4e3ak\u7684\u8fd9\u4e2a\u4f4d\u7f6e\u4e0a\u653e\u7684\u662fk+1\uff0c+2\u4ee3\u8868a[k]\u7531\u521d\u59cb\u72b6\u6001\u4e0b\u7684\u7d22\u5f15\u4e3ak\u7684\u5143\u7d20\u540e\u9762\u7684\u7b2c2\u4e2a\u5143\u7d20\u5411\u524d\u4ea4\u6362\u800c\u6765\uff1b<\/li><li>\u6570\u9006\u5e8f\u6570\u65f6\uff0c\u5982\u679c\u5411\u524d\u9762\u601d\u8def\u90a3\u6837\u4ecea[k]\u5f00\u59cb\u6570\u540e\u9762\u6bd4a[k]\u5c0f\u7684\u4e2a\u6570\u7684\u8bdd\uff0c\u90a3\u4e48\u8981\u6bcf\u6b21\u679a\u4e3ea[k]\u540e\u9762\u7684\u6240\u6709\u5143\u7d20\uff0c\u56e0\u4e3a\u6bd4a[k]\u5c0f\u7684\u5143\u7d20\u88ab\u4ea4\u6362\u5230a[k]\u540e\u9762\u4e4b\u540e\uff0c\u53ef\u4ee5\u518d\u88ab\u4ea4\u6362\u5230\u4efb\u4f55\u4f4d\u7f6e\uff1b\u6309\u7167\u8ba8\u8bba\u533a\u7684\u601d\u8def\u53ef\u4ee5\u4ecea[n-1]\u5f00\u59cb\u679a\u4e3ea[k]\u524d\u9762\u6bd4a[k]\u5927\u7684\u6570\u3002a[k]\u5728\u521d\u59cb\u72b6\u6001\u4f4d\u4e8e\u7d22\u5f15\u4e3aa[k]-1\u7684\u4f4d\u7f6e\uff0c\u7531\u4e8e\u6bcf\u4e2a\u5143\u7d20\u81f3\u591a\u5411\u524d\u4ea4\u63622\u6b21\uff0c\u6240\u4ee5\u6bd4a[k]\u5927\u7684\u5143\u7d20\u6700\u591a\u88ab\u4ea4\u6362\u5230a[k]-2\u7684\u4f4d\u7f6e\uff0c\u8fd9\u6837\u5c31\u53ef\u4ee5\u53ea\u679a\u4e3e\u7d22\u5f15\u4e3amax(0,a[k]-2)\u5230k-1\u8fd9\u4e2a\u8303\u56f4\u91cc\u6709\u591a\u5c11\u4e2a\u6570\u6bd4a[k]\u5927\u3002<\/li><\/ol>\n\n\n\n<pre class=\"wp-block-code\"><code>void minimumBribes(vector&lt;int&gt; q) {\n    int swap = 0;\n    int len = q.size();\n    for (int i = 0; i &lt; len; i++) {\n        if (q&#91;i] &gt; i+3) {\n            cout &lt;&lt; \"Too chaotic\" &lt;&lt; endl;\n            return;\n        }\n        for (int j = max(0, q&#91;i]-2); j &lt; i; j++) {\n            if (q&#91;j] &gt; q&#91;i]) {\n                ++swap;\n            }\n        }\n    }\n    cout &lt;&lt; swap &lt;&lt; endl;\n}<\/code><\/pre>\n\n\n\n<p>\u590d\u6742\u5ea6\uff1a\u7531\u4e8e\u6bcf\u4e2a\u9006\u5e8f\u5bf9\u52a0\u4e861\uff0c\u6240\u4ee5\u81f3\u5c11\u662fO(\u9006\u5e8f\u6570)\u3002<\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 ez-toc-wrap-right counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<label for=\"ez-toc-cssicon-toggle-item-69e34c3700492\" class=\"ez-toc-cssicon-toggle-label\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-69e34c3700492\" checked aria-label=\"Toggle\" \/><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/blog.cauchyschwarz.com\/?p=532\/#%E5%AE%98%E6%96%B9%E8%A7%A3%E6%B3%95\" >\u5b98\u65b9\u89e3\u6cd5<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/blog.cauchyschwarz.com\/?p=532\/#%E6%9B%B4%E4%B8%80%E8%88%AC%E7%9A%84%E8%A7%A3%E6%B3%95\" >\u66f4\u4e00\u822c\u7684\u89e3\u6cd5<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/blog.cauchyschwarz.com\/?p=532\/#%E7%94%A8%E5%BD%92%E5%B9%B6%E6%8E%92%E5%BA%8F%E6%B1%82%E8%A7%A3\" >\u7528\u5f52\u5e76\u6392\u5e8f\u6c42\u89e3<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/blog.cauchyschwarz.com\/?p=532\/#%E7%94%A8%E7%BA%BF%E6%AE%B5%E6%A0%91%E6%88%96%E8%80%85%E6%A0%91%E7%8A%B6%E6%95%B0%E7%BB%84%E6%B1%82%E8%A7%A3\" >\u7528\u7ebf\u6bb5\u6811\u6216\u8005\u6811\u72b6\u6570\u7ec4\u6c42\u89e3<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/blog.cauchyschwarz.com\/?p=532\/#%E6%A0%91%E7%8A%B6%E6%95%B0%E7%BB%84\" >\u6811\u72b6\u6570\u7ec4<\/a><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E5%AE%98%E6%96%B9%E8%A7%A3%E6%B3%95\"><\/span>\u5b98\u65b9\u89e3\u6cd5<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E6%9B%B4%E4%B8%80%E8%88%AC%E7%9A%84%E8%A7%A3%E6%B3%95\"><\/span>\u66f4\u4e00\u822c\u7684\u89e3\u6cd5<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u5982\u679c\u6ca1\u6709\u53ea\u80fd\u5411\u524d\u4ea4\u63622\u6b21\u7684\u9650\u5236\uff0c\u8fd9\u4e2a\u95ee\u9898\u5c31\u662f\u66f4\u4e00\u822c\u7684\u6c42\u9006\u5e8f\u6570\u7684\u95ee\u9898\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E7%94%A8%E5%BD%92%E5%B9%B6%E6%8E%92%E5%BA%8F%E6%B1%82%E8%A7%A3\"><\/span>\u7528\u5f52\u5e76\u6392\u5e8f\u6c42\u89e3<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u5c06\u8f93\u5165\u7684\u6392\u5217\u9012\u5f52\u5730\u5206\u4e3a\u4e24\u90e8\u5206\u8ba1\u7b97\u9006\u5e8f\u6570\uff0c\u8f93\u5165\u6392\u5217\u7684\u9006\u5e8f\u6570\u7b49\u4e8e\u524d\u534a\u90e8\u5206\u6570\u7ec4\u5185\u90e8\u7684\u9006\u5e8f\u6570\u52a0\u540e\u534a\u90e8\u5206\u5185\u90e8\u7684\u9006\u5e8f\u6570\uff0c\u4ee5\u53ca\u8de8\u8d8a\u4e86\u524d\/\u540e\u534a\u90e8\u5206\u7684\u9006\u5e8f\u5bf9\u7684\u4e2a\u6570\u3002\u524d\/\u540e\u529e\u90e8\u5206\u5185\u90e8\u7684\u9006\u5e8f\u6570\u662f\u5b50\u95ee\u9898\uff0c\u9012\u5f52\u6c42\u89e3\u3002\u800c\u8de8\u8d8a\u4e86\u524d\/\u540e\u534a\u90e8\u5206\u7684\u9006\u5e8f\u5bf9\u7684\u4e2a\u6570\u5219\u53ef\u4ee5\u5728merge\u524d\/\u540e\u534a\u90e8\u5206\u7684\u65f6\u5019\u8ba1\u7b97\uff0c\u56e0\u4e3amerge\u7684\u65f6\u5019\u540e\u534a\u90e8\u5206\u662f\u6709\u5e8f\u7684\uff0c\u6240\u4ee5\u53ef\u4ee5\u5f88\u5bb9\u6613\u7edf\u8ba1\u540e\u534a\u90e8\u5206\u6709\u591a\u5c11\u4e2a\u6570\u6bd4\u524d\u534a\u90e8\u5206\u91cc\u7684\u67d0\u4e2a\u6570\u5c0f\u3002<\/p>\n\n\n\n<p>\u5199\u5f52\u5e76\u6392\u5e8f\u65f6\uff0c\u4e5f\u9700\u8981\u601d\u8003\u5982\u4f55\u8ba9\u5f52\u5e76\u6392\u5e8f\u7684\u4ee3\u7801\u66f4\u7b80\u6d01\u548c\u9ad8\u6548\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>long count_inversion(vector&lt;int&gt; &amp;arr, int start, int end, vector&lt;int&gt; &amp;tmp_arr) {\n    if (end &lt;= start + 1) {\n        return 0;\n    }\n    long res = 0;\n    int mid = (start + end) \/ 2;\n    vector&lt;int&gt; &amp;l_arr = tmp_arr;\n    int l_i = start;\n    int r_i = mid;\n    int k = start;\n        \n    res += count_inversion(arr, start, mid, tmp_arr);\n    res += count_inversion(arr, mid, end, tmp_arr);\n    \n    for (int i = start; i &lt; mid; i++) {\n        l_arr&#91;i] = arr&#91;i];\n    }\n    \n    while (l_i &lt; mid &amp;&amp; r_i &lt; end) {\n        if (l_arr&#91;l_i] &lt;= arr&#91;r_i]) {\n            arr&#91;k++] = l_arr&#91;l_i++];\n            res += (r_i - mid);\n        } else {\n            arr&#91;k++] = arr&#91;r_i++];\n        }\n    }\n    \n    while (l_i &lt; mid) {\n        arr&#91;k++] = l_arr&#91;l_i++];\n        res += (r_i - mid);\n    }\n    \n    while (r_i &lt; end) {\n        arr&#91;k++] = arr&#91;r_i++];\n    }\n    \n    return res;\n}\n\n\/*\n * Complete the 'countInversions' function below.\n *\n * The function is expected to return a LONG_INTEGER.\n * The function accepts INTEGER_ARRAY arr as parameter.\n *\/\n\nlong countInversions(vector&lt;int&gt; arr) {\n    vector&lt;int&gt; tmp_arr(arr.size());\n  return count_inversion(arr, 0, arr.size(), tmp_arr);\n}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E7%94%A8%E7%BA%BF%E6%AE%B5%E6%A0%91%E6%88%96%E8%80%85%E6%A0%91%E7%8A%B6%E6%95%B0%E7%BB%84%E6%B1%82%E8%A7%A3\"><\/span>\u7528\u7ebf\u6bb5\u6811\u6216\u8005\u6811\u72b6\u6570\u7ec4\u6c42\u89e3<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E6%A0%91%E7%8A%B6%E6%95%B0%E7%BB%84\"><\/span>\u6811\u72b6\u6570\u7ec4<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p>\u6811\u72b6\u6570\u7ec4\u7b97\u662f\u7ebf\u6bb5\u6811\u7684\u4e00\u4e2a\u5b50\u7c7b\u5427\uff0c\u7531\u4e8e\u4ee3\u7801\u597d\u5199\u53d7\u5230\u5927\u5bb6\u9752\u7750\u3002<\/p>\n\n\n\n<p>\u89c9\u5f97<a href=\"http:\/\/\u6811\u72b6\u6570\u7ec4\u7684\u539f\u7406\u662f\u4ec0\u4e48\uff1f - SleepyBag\u7684\u56de\u7b54 - \u77e5\u4e4e https:\/\/www.zhihu.com\/question\/54404092\/answer\/785844116\">\u77e5\u4e4e\u8fd9\u4e2a\u56de\u7b54<\/a>\u8bb2\u5f97\u6700\u597d\uff0c\u6811\u72b6\u6570\u7ec4\u4e5f\u662f\u5c06\u539f\u6570\u7ec4\u5206\u5c42\u6b21\u5212\u5206\u4e3a\u4e86\u591a\u4e2a\u533a\u95f4\uff0c\u5212\u5206\u7684\u601d\u8def\u5c31\u662f<strong>\u6309\u7167\u6bcf\u5c42\u6574\u5408\u4e24\u4e2a\u4e0b\u5c42\u7ed3\u70b9\u7684\u65b9\u6848\uff0c\u628a\u8fd9\u4e2a\u6570\u7ec4\u4e00\u5c42\u4e00\u5c42\u5f80\u4e0a\u6574\u5408<\/strong>\uff0c<strong>\u4e3a\u4e86\u8282\u7701\u7a7a\u95f4\uff0c\u5220\u53bb\u4e86\u4e0d\u5fc5\u8981\u7684\u7ed3\u70b9\uff0c\u5c06\u7ed3\u70b9\u6570\u538b\u7f29\u5230\u4e0e\u6570\u7ec4\u957f\u5ea6\u76f8\u540c<\/strong>\u3002\u518d\u5177\u4f53\u7684\u7279\u6027\u548c\u7406\u89e3\u5c31\u53bb\u770b\u8fd9\u4e2a\u77e5\u4e4e\u56de\u7b54\u4e86\u5427\u3002<\/p>\n\n\n\n<p><a href=\"https:\/\/www.jianshu.com\/p\/8a4081f0ec20\">\u5229\u7528\u6811\u72b6\u6570\u7ec4\u53bb\u9006\u5e8f\u6570\u7684\u601d\u8def<\/a>\uff1a\u5bf9\u4e8e\u8f93\u5165\u7684\u6392\u5217a[0]\uff0c&#8230;\uff0ca[n-1]\uff0c\u5047\u8bbe\u6570\u7ec4\u5143\u7d20\u7684\u53d6\u503c\u8303\u56f4\u662f1\u5230m\uff0c\u90a3\u4e48\u6784\u9020\u4e00\u4e2a\u65b0\u7684\u6570\u7ec4b[1]\uff0c&#8230;\uff0cb[m]\uff0c\u4ee5\u53ca\u76f8\u5e94\u7684\u6811\u72b6\u6570\u7ec4c[1]\uff0c&#8230;\uff0cc[m]\u3002\u6570\u7ec4b[1]\uff0c&#8230;\uff0cb[m]\u5f00\u59cb\u90fd\u521d\u59cb\u5316\u4e3a0\uff0cb[i]\u4ee3\u8868\u6570\u7ec4a[0]\uff0c&#8230;\uff0ca[n-1]\u4e2d\u503c\u4e3ab[i]\u7684\u6570\u7684\u4e2a\u6570\u3002c[i]\u5219\u662f\u6811\u72b6\u6570\u7ec4\u8986\u76d6\u7684\u6570\u7ec4b\u5bf9\u5e94\u533a\u95f4\u7684\u548c\u3002\u8ba1\u7b97\u9006\u5e8f\u6570\u7b97\u6cd5\u7684\u5de5\u4f5c\u6d41\u7a0b\u5c31\u662f\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>\u679a\u4e3ea[0]\uff0c&#8230;\uff0ca[n-1]\uff1b<\/li><li><span style=\"color: initial;\">\u8981\u8ba1\u7b97\u5728\u6392\u5217\u4e2da[i]\u524d\u9762\u6709\u591a\u5c11\u4e2a\u6570\u5927\u4e8ea[i]\uff0c\u7b49\u4ef7\u4e8e\u8981\u7b97a[i]\u524d\u9762\u6709\u591a\u5c11\u4e2a\u6570\u5c0f\u4e8e\u7b49\u4e8ea[i](\u5148\u4e0d\u8003\u8651\u6392\u5217\u4e2d\u5b58\u5728\u5143\u7d20\u76f8\u7b49\u7684\u60c5\u51b5)\uff0c\u56e0\u4e3aa[i]\u524d\u9762\u6709i\u4e2a\u5143\u7d20\uff0c\u51cf\u53bba[i]\u524d\u9762\u5c0f\u4e8ea[i]\u7684\u5143\u7d20\u4e2a\u6570\u5c31\u662fa[i]\u524d\u9762\u5927\u4e8ea[i]\u7684\u5143\u7d20\u4e2a\u6570\u3002\u800cb[1]\uff0c&#8230;\uff0cb[a[i]]\u7684\u548c\u5c31\u662fa[i]\u524d\u9762\u5c0f\u4e8e\u7b49\u4e8ea[i]\u7684\u5143\u7d20\u4e2a\u6570\uff0c\u800c\u8fd9\u4e2a\u548c\u5c31\u6b63\u597d\u5229\u7528\u6811\u72b6\u6570\u7ec4c\u6765\u6c42\u3002<\/span><\/li><li>\u7528\u679a\u4e3e\u7684a[i]\u53bb\u66f4\u65b0\u6570\u7ec4b\u548cc\uff0c\u8ba9b[a[i]]\u52a01,\u8868\u793aa[i]\u8fd9\u4e2a\u503c\u51fa\u73b0\u6b21\u6570\u52a01\uff0c\u540c\u65f6\u66f4\u65b0\u5bf9\u5e94\u7684\u6811\u72b6\u6570\u7ec4c\u3002<\/li><li>\u5bf9\u4e8e\u6240\u6709\u7684a[i]\u6c42\u51fa\u4e86a[i]\u524d\u9762\u5927\u4e8ea[i]\u7684\u5143\u7d20\u4e2a\u6570\uff0c\u518d\u6c42\u548c\u5373\u662f\u8f93\u5165\u6392\u5217\u7684\u9006\u5e8f\u6570\u3002<\/li><\/ol>\n\n\n\n<p>\u9700\u8981\u8003\u8651\u7684\u95ee\u9898\uff1a<\/p>\n\n\n\n<p>\u79bb\u6563\u5316\uff1a\u8f93\u5165\u6392\u5217\u4e2d\u6bcf\u4e2a\u5143\u7d20\u7684\u53d6\u503c\u8303\u56f4\u53ef\u80fd\u5f88\u5927\uff0c\u6216\u8005\u662f\u8d1f\u6570\uff0c\u6d6e\u70b9\u6570\uff0c\u8fd9\u4e2a\u65f6\u5019\u9700\u8981\u5c06\u539f\u6765\u7684\u6570\u7ec4\u6362\u6210\u6bcf\u4e2a\u6570\u5728\u6570\u7ec4\u4e2d\u7684\u6392\u5e8f\u4f4d\u7f6e\uff0c\u4e0d\u7136\u6570\u7ec4b\u7684\u5927\u5c0f\u53ef\u80fd\u4f1a\u5f88\u79bb\u8c31\u3002\u79bb\u6563\u5316\u7684\u65b9\u5f0f\u4e0d\u5fc5\u50cf\u4e0a\u9762\u7b80\u4e66\u90a3\u7bc7\u535a\u5ba2\u4e00\u6837\u5148\u6392\u5e8f\uff0c\u7136\u540e\u518d\u5bf9\u6bcf\u4e2a\u5143\u7d20\u67e5\u627e\u6392\u5e8f\u540e\u7684\u4f4d\u7f6e\uff0c\u800c\u662f\u53ef\u4ee5\u7528\u4e00\u4e2astruct {int val, int index}\u7684\u7ed3\u6784\u4f53\u6765\u4ee3\u66ff\u539f\u6765\u7684\u5143\u7d20\u8fdb\u884c\u6392\u5e8f\uff0c\u7136\u540e\u518d\u904d\u5386\u6392\u5e8f\u540e\u7684\u7ed3\u6784\u4f53\u6570\u7ec4\uff0c\u66f4\u65b0\u7ed3\u6784\u4f53\u5185\u90e8\u7684index\u5373\u53ef\uff0c\u8fd9\u6837\u5c31\u514d\u53bb\u4e86\u5bf9\u6bcf\u4e2a\u5143\u7d20\u67e5\u627e\u6392\u5e8f\u540e\u7684\u4f4d\u7f6e\u7684\u67e5\u627e\u65f6\u95f4\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u9898\u76ee 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