{"id":107035,"date":"2026-09-18T20:16:38","date_gmt":"2026-09-18T12:16:38","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/107035.html"},"modified":"2026-09-18T20:16:38","modified_gmt":"2026-09-18T12:16:38","slug":"27-%e6%80%bb%e7%bb%93%e4%b8%8e%e5%ae%9e%e6%88%98","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/107035.html","title":{"rendered":"27-\u603b\u7ed3\u4e0e\u5b9e\u6218"},"content":{"rendered":"<\/p>\n<h4>C\u8bed\u8a00\u6570\u636e\u7ed3\u6784\u7cfb\u5217&#xff1a;\u603b\u7ed3\u4e0e\u5b9e\u6218\u7bc7<\/h4>\n<ul>\n<li>C\u8bed\u8a00\u6570\u636e\u7ed3\u6784\u7cfb\u5217&#xff08;\u4e8c\u5341\u4e03&#xff09;&#xff1a;\u603b\u7ed3\u4e0e\u5b9e\u6218<\/li>\n<li>\n<ul>\n<li>\u4e00\u3001\u524d\u8a00<\/li>\n<li>\u4e8c\u3001\u7cfb\u5217\u56de\u987e<\/li>\n<li>\n<ul>\n<li>2.1 \u7ebf\u6027\u7ed3\u6784<\/li>\n<li>2.2 \u6811\u5f62\u7ed3\u6784<\/li>\n<li>2.3 \u56fe\u7ed3\u6784<\/li>\n<li>2.4 \u6392\u5e8f\u7b97\u6cd5<\/li>\n<li>2.5 \u67e5\u627e\u7b97\u6cd5<\/li>\n<\/ul>\n<\/li>\n<li>\u4e09\u3001LeetCode\u9ad8\u9891\u9898\u5b9e\u6218<\/li>\n<li>\n<ul>\n<li>3.1 \u6570\u7ec4<\/li>\n<li>3.2 \u94fe\u8868<\/li>\n<li>3.3 \u6808<\/li>\n<li>3.4 \u6811<\/li>\n<li>3.5 \u56fe<\/li>\n<li>3.6 \u6392\u5e8f<\/li>\n<li>3.7 \u52a8\u6001\u89c4\u5212<\/li>\n<\/ul>\n<\/li>\n<li>\u56db\u3001\u8fdb\u9636\u5b66\u4e60\u8def\u7ebf<\/li>\n<li>\n<ul>\n<li>4.1 \u8fdb\u9636\u6570\u636e\u7ed3\u6784<\/li>\n<li>4.2 \u7b97\u6cd5\u8fdb\u9636<\/li>\n<li>4.3 \u7cfb\u7edf\u8bbe\u8ba1<\/li>\n<\/ul>\n<\/li>\n<li>\u4e94\u3001\u5b66\u4e60\u5efa\u8bae<\/li>\n<li>\n<ul>\n<li>5.1 \u5237\u9898\u5efa\u8bae<\/li>\n<li>5.2 \u5b66\u4e60\u65b9\u6cd5<\/li>\n<\/ul>\n<\/li>\n<li>\u516d\u3001\u7cfb\u5217\u5b8c\u7ed3<\/li>\n<li>\n<ul>\n<li>6.1 \u76ee\u5f55<\/li>\n<li>6.2 \u5bc4\u8bed<\/li>\n<\/ul>\n<\/li>\n<li>\u4e03\u3001\u6700\u540e\u7684\u8bdd<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h2>C\u8bed\u8a00\u6570\u636e\u7ed3\u6784\u7cfb\u5217&#xff08;\u4e8c\u5341\u4e03&#xff09;&#xff1a;\u603b\u7ed3\u4e0e\u5b9e\u6218<\/h2>\n<p>&#x1f3af; \u672c\u7bc7\u76ee\u6807&#xff1a;\u56de\u987e\u6574\u4e2a\u7cfb\u5217&#xff0c;\u5b9e\u6218LeetCode\u9ad8\u9891\u9898&#xff01; &#x1f4cc; \u6458\u8981&#xff1a;\u672c\u6587\u662f C \u8bed\u8a00\u6570\u636e\u7ed3\u6784\u7cfb\u5217\u7684\u6536\u5b98\u4e4b\u4f5c&#xff0c;\u7cfb\u7edf\u56de\u987e\u4e86\u7ebf\u6027\u7ed3\u6784&#xff08;\u6570\u7ec4\u3001\u94fe\u8868\u3001\u6808\u3001\u961f\u5217&#xff09;\u3001\u6811\u5f62\u7ed3\u6784&#xff08;\u4e8c\u53c9\u6811\u3001BST\u3001\u5806\u3001AVL\u3001\u7ea2\u9ed1\u6811&#xff09;\u3001\u56fe\u7ed3\u6784&#xff08;DFS\u3001BFS\u3001\u6700\u5c0f\u751f\u6210\u6811\u3001\u6700\u77ed\u8def\u5f84&#xff09;\u3001\u6392\u5e8f\u4e0e\u67e5\u627e\u7b97\u6cd5&#xff0c;\u5e76\u7cbe\u9009 7 \u9053 LeetCode \u9ad8\u9891\u9898&#xff08;\u4e24\u6570\u4e4b\u548c\u3001\u53cd\u8f6c\u94fe\u8868\u3001\u6709\u6548\u7684\u62ec\u53f7\u3001\u4e8c\u53c9\u6811\u6700\u5927\u6df1\u5ea6\u3001\u5c9b\u5c7f\u6570\u91cf\u3001\u5408\u5e76\u6709\u5e8f\u6570\u7ec4\u3001\u722c\u697c\u68af&#xff09;\u7ed9\u51fa C \u8bed\u8a00\u5b9e\u73b0\u3002\u6700\u540e\u7ed9\u51fa\u8fdb\u9636\u5b66\u4e60\u8def\u7ebf\u4e0e\u5237\u9898\u5efa\u8bae&#xff0c;\u5e2e\u52a9\u8bfb\u8005\u5b8c\u6210\u4ece\u7406\u8bba\u5230\u5b9e\u6218\u7684\u95ed\u73af\u3002<\/p>\n<hr \/>\n<h3>\u4e00\u3001\u524d\u8a00<\/h3>\n<p>\u54c8\u55bd\u5c0f\u4f19\u4f34\u4eec&#xff01;&#x1f44b;<\/p>\n<p>\u606d\u559c\u5927\u5bb6\u5b66\u5b8c\u4e86\u6574\u4e2a\u6570\u636e\u7ed3\u6784\u7cfb\u5217&#xff01;&#x1f389;<\/p>\n<p>\u4eca\u5929\u6211\u4eec\u6765&#xff1a;<\/p>\n<li>&#x1f4cb; \u56de\u987e\u603b\u7ed3\u6240\u6709\u5185\u5bb9<\/li>\n<li>&#x1f4aa; \u5b9e\u6218\u6f14\u7ec3\u7ecf\u5178\u9898\u76ee<\/li>\n<li>&#x1f680; \u8fdb\u9636\u5efa\u8bae\u540e\u7eed\u5b66\u4e60\u8def\u7ebf<\/li>\n<hr \/>\n<h3>\u4e8c\u3001\u7cfb\u5217\u56de\u987e<\/h3>\n<h4>2.1 \u7ebf\u6027\u7ed3\u6784<\/h4>\n<table>\n<tr>\u6570\u636e\u7ed3\u6784\u7279\u70b9\u6838\u5fc3\u64cd\u4f5c\u5e94\u7528<\/tr>\n<tbody>\n<tr>\n<td align=\"center\">\u6570\u7ec4<\/td>\n<td align=\"center\">\u8fde\u7eed\u5b58\u50a8<\/td>\n<td align=\"center\">\u968f\u673a\u8bbf\u95eeO(1)<\/td>\n<td align=\"center\">\u57fa\u7840\u5b58\u50a8<\/td>\n<\/tr>\n<tr>\n<td align=\"center\">\u94fe\u8868<\/td>\n<td align=\"center\">\u79bb\u6563\u5b58\u50a8<\/td>\n<td align=\"center\">\u63d2\u5165\u5220\u9664O(1)<\/td>\n<td align=\"center\">\u52a8\u6001\u6570\u636e<\/td>\n<\/tr>\n<tr>\n<td align=\"center\">\u6808<\/td>\n<td align=\"center\">LIFO<\/td>\n<td align=\"center\">push\/pop<\/td>\n<td align=\"center\">\u62ec\u53f7\u5339\u914d<\/td>\n<\/tr>\n<tr>\n<td align=\"center\">\u961f\u5217<\/td>\n<td align=\"center\">FIFO<\/td>\n<td align=\"center\">enqueue\/dequeue<\/td>\n<td align=\"center\">BFS<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h4>2.2 \u6811\u5f62\u7ed3\u6784<\/h4>\n<table>\n<tr>\u6570\u636e\u7ed3\u6784\u7279\u70b9\u65f6\u95f4\u590d\u6742\u5ea6\u5e94\u7528<\/tr>\n<tbody>\n<tr>\n<td align=\"center\">\u4e8c\u53c9\u6811<\/td>\n<td align=\"center\">\u4e24\u4e2a\u5b69\u5b50<\/td>\n<td align=\"center\">O(n)<\/td>\n<td align=\"center\">\u57fa\u7840\u7ed3\u6784<\/td>\n<\/tr>\n<tr>\n<td align=\"center\">BST<\/td>\n<td align=\"center\">\u5de6&lt;\u6839&lt;\u53f3<\/td>\n<td align=\"center\">O(logn)<\/td>\n<td align=\"center\">\u67e5\u627e<\/td>\n<\/tr>\n<tr>\n<td align=\"center\">\u5806<\/td>\n<td align=\"center\">\u5b8c\u5168\u4e8c\u53c9\u6811<\/td>\n<td align=\"center\">O(logn)<\/td>\n<td align=\"center\">\u4f18\u5148\u961f\u5217<\/td>\n<\/tr>\n<tr>\n<td align=\"center\">AVL<\/td>\n<td align=\"center\">\u4e25\u683c\u5e73\u8861<\/td>\n<td align=\"center\">O(logn)<\/td>\n<td align=\"center\">\u67e5\u627e\u5bc6\u96c6<\/td>\n<\/tr>\n<tr>\n<td align=\"center\">\u7ea2\u9ed1\u6811<\/td>\n<td align=\"center\">\u8fd1\u4f3c\u5e73\u8861<\/td>\n<td align=\"center\">O(logn)<\/td>\n<td align=\"center\">\u901a\u7528<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h4>2.3 \u56fe\u7ed3\u6784<\/h4>\n<table>\n<tr>\u7b97\u6cd5\u7528\u9014\u65f6\u95f4\u590d\u6742\u5ea6<\/tr>\n<tbody>\n<tr>\n<td align=\"center\">DFS<\/td>\n<td align=\"center\">\u6df1\u5ea6\u904d\u5386<\/td>\n<td align=\"center\">O(V&#043;E)<\/td>\n<\/tr>\n<tr>\n<td align=\"center\">BFS<\/td>\n<td align=\"center\">\u5e7f\u5ea6\u904d\u5386<\/td>\n<td align=\"center\">O(V&#043;E)<\/td>\n<\/tr>\n<tr>\n<td align=\"center\">Prim<\/td>\n<td align=\"center\">\u6700\u5c0f\u751f\u6210\u6811<\/td>\n<td align=\"center\">O(V\u00b2)<\/td>\n<\/tr>\n<tr>\n<td align=\"center\">Kruskal<\/td>\n<td align=\"center\">\u6700\u5c0f\u751f\u6210\u6811<\/td>\n<td align=\"center\">O(ElogE)<\/td>\n<\/tr>\n<tr>\n<td align=\"center\">Dijkstra<\/td>\n<td align=\"center\">\u6700\u77ed\u8def\u5f84<\/td>\n<td align=\"center\">O(V\u00b2)<\/td>\n<\/tr>\n<tr>\n<td align=\"center\">Floyd<\/td>\n<td align=\"center\">\u5168\u6e90\u6700\u77ed\u8def<\/td>\n<td align=\"center\">O(V\u00b3)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h4>2.4 \u6392\u5e8f\u7b97\u6cd5<\/h4>\n<table>\n<tr>\u7b97\u6cd5\u5e73\u5747\u6700\u574f\u7a33\u5b9a\u9002\u7528<\/tr>\n<tbody>\n<tr>\n<td align=\"center\">\u5192\u6ce1<\/td>\n<td align=\"center\">O(n\u00b2)<\/td>\n<td align=\"center\">O(n\u00b2)<\/td>\n<td align=\"center\">\u2705<\/td>\n<td align=\"center\">\u6559\u5b66<\/td>\n<\/tr>\n<tr>\n<td align=\"center\">\u9009\u62e9<\/td>\n<td align=\"center\">O(n\u00b2)<\/td>\n<td align=\"center\">O(n\u00b2)<\/td>\n<td align=\"center\">\u274c<\/td>\n<td align=\"center\">\u6559\u5b66<\/td>\n<\/tr>\n<tr>\n<td align=\"center\">\u63d2\u5165<\/td>\n<td align=\"center\">O(n\u00b2)<\/td>\n<td align=\"center\">O(n\u00b2)<\/td>\n<td align=\"center\">\u2705<\/td>\n<td align=\"center\">\u5c0f\u6570\u636e<\/td>\n<\/tr>\n<tr>\n<td align=\"center\">\u5feb\u6392<\/td>\n<td align=\"center\">O(nlogn)<\/td>\n<td align=\"center\">O(n\u00b2)<\/td>\n<td align=\"center\">\u274c<\/td>\n<td align=\"center\">\u901a\u7528<\/td>\n<\/tr>\n<tr>\n<td align=\"center\">\u5f52\u5e76<\/td>\n<td align=\"center\">O(nlogn)<\/td>\n<td align=\"center\">O(nlogn)<\/td>\n<td align=\"center\">\u2705<\/td>\n<td align=\"center\">\u7a33\u5b9a\u6392\u5e8f<\/td>\n<\/tr>\n<tr>\n<td align=\"center\">\u5806\u6392<\/td>\n<td align=\"center\">O(nlogn)<\/td>\n<td align=\"center\">O(nlogn)<\/td>\n<td align=\"center\">\u274c<\/td>\n<td align=\"center\">TopK<\/td>\n<\/tr>\n<tr>\n<td align=\"center\">\u8ba1\u6570<\/td>\n<td align=\"center\">O(n&#043;k)<\/td>\n<td align=\"center\">O(k)<\/td>\n<td align=\"center\">\u2705<\/td>\n<td align=\"center\">\u5c0f\u8303\u56f4\u6574\u6570<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h4>2.5 \u67e5\u627e\u7b97\u6cd5<\/h4>\n<table>\n<tr>\u7b97\u6cd5\u65f6\u95f4\u9002\u7528<\/tr>\n<tbody>\n<tr>\n<td align=\"center\">\u987a\u5e8f\u67e5\u627e<\/td>\n<td align=\"center\">O(n)<\/td>\n<td align=\"center\">\u65e0\u5e8f<\/td>\n<\/tr>\n<tr>\n<td align=\"center\">\u4e8c\u5206\u67e5\u627e<\/td>\n<td align=\"center\">O(logn)<\/td>\n<td align=\"center\">\u6709\u5e8f<\/td>\n<\/tr>\n<tr>\n<td align=\"center\">\u54c8\u5e0c\u8868<\/td>\n<td align=\"center\">O(1)*<\/td>\n<td align=\"center\">\u901a\u7528<\/td>\n<\/tr>\n<tr>\n<td align=\"center\">\u5e76\u67e5\u96c6<\/td>\n<td align=\"center\">O(\u03b1(n))<\/td>\n<td align=\"center\">\u96c6\u5408\u5408\u5e76<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<h3>\u4e09\u3001LeetCode\u9ad8\u9891\u9898\u5b9e\u6218<\/h3>\n<h4>3.1 \u6570\u7ec4<\/h4>\n<p>\u9898\u76ee1&#xff1a;\u4e24\u6570\u4e4b\u548c<\/p>\n<p><span class=\"token keyword\">int<\/span><span class=\"token operator\">*<\/span> <span class=\"token function\">twoSum<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span><span class=\"token operator\">*<\/span> nums<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> numsSize<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> target<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span><span class=\"token operator\">*<\/span> returnSize<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> <span class=\"token operator\">*<\/span>result <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span><span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span><span class=\"token function\">malloc<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">2<\/span> <span class=\"token operator\">*<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token operator\">*<\/span>returnSize <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/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> numsSize<span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> j <span class=\"token operator\">&#061;<\/span> i <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span> j <span class=\"token operator\">&lt;<\/span> numsSize<span class=\"token punctuation\">;<\/span> j<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>nums<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#043;<\/span> nums<span class=\"token punctuation\">[<\/span>j<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;&#061;<\/span> target<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                result<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> i<span class=\"token punctuation\">;<\/span><br \/>\n                result<span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> j<span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token keyword\">return<\/span> result<span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> result<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h4>3.2 \u94fe\u8868<\/h4>\n<p>\u9898\u76ee2&#xff1a;\u53cd\u8f6c\u94fe\u8868<\/p>\n<p><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">ListNode<\/span><span class=\"token operator\">*<\/span> <span class=\"token function\">reverseList<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">ListNode<\/span><span class=\"token operator\">*<\/span> head<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">ListNode<\/span> <span class=\"token operator\">*<\/span>prev <span class=\"token operator\">&#061;<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token operator\">*<\/span>curr <span class=\"token operator\">&#061;<\/span> head<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span>curr<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">ListNode<\/span> <span class=\"token operator\">*<\/span>next <span class=\"token operator\">&#061;<\/span> curr<span class=\"token operator\">-&gt;<\/span>next<span class=\"token punctuation\">;<\/span><br \/>\n        curr<span class=\"token operator\">-&gt;<\/span>next <span class=\"token operator\">&#061;<\/span> prev<span class=\"token punctuation\">;<\/span><br \/>\n        prev <span class=\"token operator\">&#061;<\/span> curr<span class=\"token punctuation\">;<\/span><br \/>\n        curr <span class=\"token operator\">&#061;<\/span> next<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> prev<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h4>3.3 \u6808<\/h4>\n<p>\u9898\u76ee3&#xff1a;\u6709\u6548\u7684\u62ec\u53f7<\/p>\n<p>bool <span class=\"token function\">isValid<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">char<\/span> <span class=\"token operator\">*<\/span> s<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">char<\/span> stack<span class=\"token punctuation\">[<\/span><span class=\"token number\">5000<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> top <span class=\"token operator\">&#061;<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span>s<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span>s <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token char\">&#039;(&#039;<\/span> <span class=\"token operator\">||<\/span> <span class=\"token operator\">*<\/span>s <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token char\">&#039;[&#039;<\/span> <span class=\"token operator\">||<\/span> <span class=\"token operator\">*<\/span>s <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token char\">&#039;{&#039;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            stack<span class=\"token punctuation\">[<\/span><span class=\"token operator\">&#043;&#043;<\/span>top<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token operator\">*<\/span>s<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 keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>top <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">return<\/span> false<span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span>s <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token char\">&#039;)&#039;<\/span> <span class=\"token operator\">&amp;&amp;<\/span> stack<span class=\"token punctuation\">[<\/span>top<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">!&#061;<\/span> <span class=\"token char\">&#039;(&#039;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">return<\/span> false<span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span>s <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token char\">&#039;]&#039;<\/span> <span class=\"token operator\">&amp;&amp;<\/span> stack<span class=\"token punctuation\">[<\/span>top<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">!&#061;<\/span> <span class=\"token char\">&#039;[&#039;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">return<\/span> false<span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span>s <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token char\">&#039;}&#039;<\/span> <span class=\"token operator\">&amp;&amp;<\/span> stack<span class=\"token punctuation\">[<\/span>top<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">!&#061;<\/span> <span class=\"token char\">&#039;{&#039;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">return<\/span> false<span class=\"token punctuation\">;<\/span><br \/>\n            top<span class=\"token operator\">&#8212;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        s<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> top <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h4>3.4 \u6811<\/h4>\n<p>\u9898\u76ee4&#xff1a;\u4e8c\u53c9\u6811\u7684\u6700\u5927\u6df1\u5ea6<\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">maxDepth<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">TreeNode<\/span><span class=\"token operator\">*<\/span> root<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>root<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> left <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">maxDepth<\/span><span class=\"token punctuation\">(<\/span>root<span class=\"token operator\">-&gt;<\/span>left<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> right <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">maxDepth<\/span><span class=\"token punctuation\">(<\/span>root<span class=\"token operator\">-&gt;<\/span>right<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token punctuation\">(<\/span>left <span class=\"token operator\">&gt;<\/span> right <span class=\"token operator\">?<\/span> left <span class=\"token operator\">:<\/span> right<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h4>3.5 \u56fe<\/h4>\n<p>\u9898\u76ee5&#xff1a;\u5c9b\u5c7f\u6570\u91cf<\/p>\n<p><span class=\"token keyword\">void<\/span> <span class=\"token function\">dfs<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span><span class=\"token operator\">*<\/span> grid<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> i<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> j<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> gridSize<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> colSize<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>i <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">0<\/span> <span class=\"token operator\">||<\/span> i <span class=\"token operator\">&gt;&#061;<\/span> gridSize <span class=\"token operator\">||<\/span> j <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">0<\/span> <span class=\"token operator\">||<\/span> j <span class=\"token operator\">&gt;&#061;<\/span> colSize<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">return<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>grid<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">[<\/span>j<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">!&#061;<\/span> <span class=\"token char\">&#039;1&#039;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">return<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    grid<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">[<\/span>j<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token char\">&#039;0&#039;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">dfs<\/span><span class=\"token punctuation\">(<\/span>grid<span class=\"token punctuation\">,<\/span> i<span class=\"token operator\">&#043;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> j<span class=\"token punctuation\">,<\/span> gridSize<span class=\"token punctuation\">,<\/span> colSize<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">dfs<\/span><span class=\"token punctuation\">(<\/span>grid<span class=\"token punctuation\">,<\/span> i<span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> j<span class=\"token punctuation\">,<\/span> gridSize<span class=\"token punctuation\">,<\/span> colSize<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">dfs<\/span><span class=\"token punctuation\">(<\/span>grid<span class=\"token punctuation\">,<\/span> i<span class=\"token punctuation\">,<\/span> j<span class=\"token operator\">&#043;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> gridSize<span class=\"token punctuation\">,<\/span> colSize<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">dfs<\/span><span class=\"token punctuation\">(<\/span>grid<span class=\"token punctuation\">,<\/span> i<span class=\"token punctuation\">,<\/span> j<span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> gridSize<span class=\"token punctuation\">,<\/span> colSize<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">numIslands<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span><span class=\"token operator\">*<\/span> grid<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> gridSize<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span><span class=\"token operator\">*<\/span> gridColSize<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> count <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> colSize <span class=\"token operator\">&#061;<\/span> gridColSize<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/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> gridSize<span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> j <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> j <span class=\"token operator\">&lt;<\/span> colSize<span class=\"token punctuation\">;<\/span> j<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>grid<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">[<\/span>j<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token char\">&#039;1&#039;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token function\">dfs<\/span><span class=\"token punctuation\">(<\/span>grid<span class=\"token punctuation\">,<\/span> i<span class=\"token punctuation\">,<\/span> j<span class=\"token punctuation\">,<\/span> gridSize<span class=\"token punctuation\">,<\/span> colSize<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                count<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> count<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h4>3.6 \u6392\u5e8f<\/h4>\n<p>\u9898\u76ee6&#xff1a;\u5408\u5e76\u4e24\u4e2a\u6709\u5e8f\u6570\u7ec4<\/p>\n<p><span class=\"token keyword\">void<\/span> <span class=\"token function\">merge<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span><span class=\"token operator\">*<\/span> nums1<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> nums1Size<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> m<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span><span class=\"token operator\">*<\/span> nums2<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> nums2Size<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> n<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> i <span class=\"token operator\">&#061;<\/span> m <span class=\"token operator\">&#8211;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> j <span class=\"token operator\">&#061;<\/span> n <span class=\"token operator\">&#8211;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> k <span class=\"token operator\">&#061;<\/span> m <span class=\"token operator\">&#043;<\/span> n <span class=\"token operator\">&#8211;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span>i <span class=\"token operator\">&gt;&#061;<\/span> <span class=\"token number\">0<\/span> <span class=\"token operator\">&amp;&amp;<\/span> j <span class=\"token operator\">&gt;&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>nums1<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&gt;<\/span> nums2<span class=\"token punctuation\">[<\/span>j<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            nums1<span class=\"token punctuation\">[<\/span>k<span class=\"token operator\">&#8212;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> nums1<span class=\"token punctuation\">[<\/span>i<span class=\"token operator\">&#8212;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">else<\/span><br \/>\n            nums1<span class=\"token punctuation\">[<\/span>k<span class=\"token operator\">&#8212;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> nums2<span class=\"token punctuation\">[<\/span>j<span class=\"token operator\">&#8212;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span>j <span class=\"token operator\">&gt;&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        nums1<span class=\"token punctuation\">[<\/span>k<span class=\"token operator\">&#8212;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> nums2<span class=\"token punctuation\">[<\/span>j<span class=\"token operator\">&#8212;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h4>3.7 \u52a8\u6001\u89c4\u5212<\/h4>\n<p>\u9898\u76ee7&#xff1a;\u722c\u697c\u68af<\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">climbStairs<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> n<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>n <span class=\"token operator\">&lt;&#061;<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">return<\/span> n<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> dp<span class=\"token punctuation\">[<\/span>n <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    dp<span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    dp<span class=\"token punctuation\">[<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">3<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;&#061;<\/span> n<span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        dp<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> dp<span class=\"token punctuation\">[<\/span>i<span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#043;<\/span> dp<span class=\"token punctuation\">[<\/span>i<span class=\"token operator\">&#8211;<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> dp<span class=\"token punctuation\">[<\/span>n<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<hr \/>\n<h3>\u56db\u3001\u8fdb\u9636\u5b66\u4e60\u8def\u7ebf<\/h3>\n<h4>4.1 \u8fdb\u9636\u6570\u636e\u7ed3\u6784<\/h4>\n<ul>\n<li>&#x1f534; B\u6811\/B&#043;\u6811<\/li>\n<li>&#x1f534; \u8df3\u8868<\/li>\n<li>&#x1f534; \u56fe\u6570\u636e\u5e93<\/li>\n<li>&#x1f534; \u5e03\u9686\u8fc7\u6ee4\u5668<\/li>\n<\/ul>\n<h4>4.2 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