{"id":69777,"date":"2026-02-01T03:17:35","date_gmt":"2026-01-31T19:17:35","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/69777.html"},"modified":"2026-02-01T03:17:35","modified_gmt":"2026-01-31T19:17:35","slug":"%e3%80%90%e4%b8%87%e5%ad%97%e8%a7%a3%e6%9e%90%e3%80%91%e4%bb%a5leetcode-206-21-23%e9%93%be%e8%a1%a8%e5%bf%85%e5%88%b7%e4%b8%89%e9%a2%98%e4%b8%ba%e4%be%8b%ef%bc%8c%e6%89%8b%e6%8a%8a%e6%89%8b%e6%95%99","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/69777.html","title":{"rendered":"\u3010\u4e07\u5b57\u89e3\u6790\u3011\u4ee5LeetCode 206\/21\/23\u94fe\u8868\u5fc5\u5237\u4e09\u9898\u4e3a\u4f8b\uff0c\u624b\u628a\u624b\u6559\u4f60\u62c6\u89e3\u94fe\u8868\u9898\u7684\u4f18\u5316\u601d\u8def(\u9644\u52a8\u56fe)-\u3010\u6570\u636e\u7ed3\u6784\u4e0e\u7b97\u6cd5\u3011- \u5b9e\u6218\u7bc7\uff08\u4e00\uff09"},"content":{"rendered":"<\/p>\n

\u524d\u8a00<\/h3>\n

\u672c\u6587\u57fa\u4e8eC\u8bed\u8a00\u63cf\u8ff0<\/h4>\n

\u6b63\u786e\u98df\u7528\u65b9\u5f0f：\u6709C\u8bed\u8a00\u57fa\u7840，\u4ec5\u719f\u6089\u5355\u5411\u94fe\u8868\u57fa\u672c\u64cd\u4f5c\u4e14\u8feb\u5207\u9700\u8981\u5b9e\u6218\u8fdb\u884c\u5de9\u56fa\u3002<\/p>\n

\u6ee1\u8db3\u8fd9\u4e9b\u6761\u4ef6\u7684\u5c0f\u4f19\u4f34\u4eec，\u672c\u6587\u975e\u5e38\u503c\u5f97\u4f60\u4e00\u5543！\u9605\u8bfb\u672c\u6587，\u4f60\u6536\u83b7\u7684\u5c06\u8fdc\u4e0d\u6b62\u662f\u4f1a\u89e3\u8fd9\u4e09\u9053\u9898，\u66f4\u80fd\u6536\u83b7\u201d\u9762\u5bf9\u964c\u751f\u7b97\u6cd5\u9898，\u8be5\u5982\u4f55\u5f00\u59cb\u601d\u8003\u201c\u7b49\u62c6\u89e3\u7b97\u6cd5\u95ee\u9898\u7684\u901a\u7528\u65b9\u6cd5，\u8fd9\u4e5f\u662f\u672c\u6587\u4e3b\u6253\u5185\u5bb9\u3002<\/p>\n

\u540c\u65f6\u6b22\u8fce\u5404\u4f4d\u5927\u4f6c\u524d\u6765\u7ea0\u9519\u3002<\/p>\n

LeetCode 206(\u53cd\u8f6c\u94fe\u8868)\u300121（\u5408\u5e76\u4e24\u4e2a\u6709\u5e8f\u94fe\u8868）\u300123（\u5408\u5e76K\u4e2a\u6709\u5e8f\u94fe\u8868）\u672c\u6587\u5c06\u7531\u6d45\u5165\u6df1\u5730\u5e26\u4f60\u7406\u987a\u903b\u8f91，\u5373\u4f7f\u662f\u65b0\u624b\u4e5f\u80fd\u5f88\u5feb\u4e0a\u624b\u3002<\/p>\n

\u65b0\u4eba\u7b2c\u4e00\u6b21\u53d1\u6587，\u672c\u6587\u6587\u672c\u3001\u94fe\u8868\u76f8\u5173\u56fe\u7247\u3001\u52a8\u56fe\u6f14\u793a\u7686\u5c5e\u539f\u521b，\u521b\u4f5c\u4e0d\u6613，\u6c42\u70b9\u8d5e！<\/p>\n

\u559c\u6b22\u672c\u6587\u98ce\u683c\u6216\u662f\u8ba4\u53ef\u672c\u6587\u601d\u60f3\u7684\u8bdd，\u53ef\u4ee5\u70b9\u4e2a\u5173\u6ce8，\u52a9\u529b\u6211\u4eca\u540e\u809d\u51fa\u66f4\u591a\u4f18\u8d28\u597d\u6587！<\/p>\n<\/p>\n

\n

\u76ee\u5f55<\/p>\n

\u524d\u8a00<\/p>\n

\u672c\u6587\u57fa\u4e8eC\u8bed\u8a00\u63cf\u8ff0<\/p>\n

\u4e00\u3001\u57fa\u7840\u94fa\u57ab<\/p>\n

1.\u8282\u70b9\u4e0e\u8868\u5934<\/p>\n

2.\u94fe\u8868\u7684\u7edf\u4e00<\/p>\n

3.\u54d1\u5143\u8282\u70b9（\u865a\u62df\u5934\u8282\u70b9）<\/p>\n

\u4e8c\u3001\u8be6\u7ec6\u89e3\u6790<\/p>\n

1.\u53cd\u8f6c\u94fe\u8868-\u7b80\u5355<\/p>\n

1.1\u9898\u76ee\u5206\u6790<\/p>\n

1.2\u601d\u8def\u63a8\u5bfc<\/p>\n

1.2.1\u5934\u63d2\u6cd5<\/p>\n

1.2.2\u9012\u5f52\u6cd5<\/p>\n

1.2.3\u53cc\u6307\u9488\u8fed\u4ee3\u6cd5<\/p>\n

2.\u5408\u5e76\u4e24\u4e2a\u6709\u5e8f\u94fe\u8868-\u7b80\u5355<\/p>\n

2.1 \u9898\u76ee\u5206\u6790<\/p>\n

2.2 \u601d\u8def\u63a8\u5bfc<\/p>\n

2.2.1 \u8fed\u4ee3\u6cd5（\u4e3b\u94fe\u5b9e\u73b0）<\/p>\n

2.2.2 \u8fed\u4ee3\u6cd5（\u5bf9\u79f0\u5b9e\u73b0）<\/p>\n

2.2.3 \u9012\u5f52\u6cd5<\/p>\n

3.\u5408\u5e76K\u4e2a\u5347\u5e8f\u94fe\u8868 – \u4e2d\u7b49<\/p>\n

3.1\u9898\u76ee\u5206\u6790<\/p>\n

3.2 \u601d\u8def\u63a8\u5bfc<\/p>\n

3.2.1 \u201d\u66b4\u529b\u4e32\u73e0\u6cd5\u201c<\/p>\n

3.2.2 \u66b4\u529b\u8fed\u4ee3\u6cd5<\/p>\n

3.2.3 \u4f18\u5148\u961f\u5217\u6cd5（\u6700\u5c0f\u5806\u5b9e\u73b0）<\/p>\n

3.2.4 \u5206\u6cbb\u5408\u5e76\u6cd5（\u8fed\u4ee3\u5b9e\u73b0-\u81ea\u5e95\u5411\u4e0a）<\/p>\n

3.2.5\u5206\u6cbb\u5408\u5e76\u6cd5（\u9012\u5f52\u5b9e\u73b0-\u81ea\u9876\u5411\u4e0b）<\/p>\n

\u4e09\u3001\u603b\u7ed3<\/p>\n

1. \u6838\u5fc3\u9898\u578b\u4e0e\u89e3\u9898\u65b9\u6cd5\u68b3\u7406<\/p>\n

1.1 \u53cd\u8f6c\u94fe\u8868（LeetCode 206）<\/p>\n

1.2 \u5408\u5e76\u4e24\u4e2a\u6709\u5e8f\u94fe\u8868（LeetCode 21）<\/p>\n

1.3 \u5408\u5e76K\u4e2a\u5347\u5e8f\u94fe\u8868（LeetCode 23）<\/p>\n

2. \u901a\u7528\u89e3\u9898\u601d\u7ef4\u4e0e\u4f18\u5316\u6280\u5de7<\/p>\n

2.1 \u8fb9\u754c\u5904\u7406\u4f18\u5148<\/p>\n

2.2 \u6307\u9488\u7ba1\u7406\u662f\u6838\u5fc3<\/p>\n

2.3 \u66b4\u529b\u601d\u8def\u662f\u4f18\u5316\u7684\u8d77\u70b9<\/p>\n

2.4 \u590d\u7528\u57fa\u7840\u903b\u8f91，\u62c6\u89e3\u590d\u6742\u95ee\u9898<\/p>\n

3.\u65b9\u6cd5\u6289\u62e9\u4e0e\u573a\u666f\u9002\u914d<\/p>\n

4.\u5b66\u4e60\u6536\u83b7\u4e0e\u540e\u7eed\u5ef6\u4f38<\/p>\n

4.1 \u6838\u5fc3\u6536\u83b7<\/p>\n

4.2 \u540e\u7eed\u5ef6\u4f38<\/p>\n

\u56db\u3001\u7ed3\u8bed<\/p>\n<\/p>\n

\n

\u4e00\u3001\u57fa\u7840\u94fa\u57ab<\/h3>\n

\u6b64\u90e8\u5206\u5e2e\u52a9\u90e8\u5206\u8bfb\u8005\u8fdb\u884c\u57fa\u7840\u56de\u987e，\u5982\u679c\u57fa\u7840\u624e\u5b9e，\u8bf7\u76f4\u63a5\u8df3\u8f6c\u81f3\u5b9e\u6218\u53ca\u8bb2\u89e3\u90e8\u5206\u3002<\/p>\n

1.\u8282\u70b9\u4e0e\u8868\u5934<\/h4>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u65e0\u8bba\u4f60\u5e08\u4ece\u4f55\u5904，\u8bb2\u5230\u94fe\u8868\u7684\u8868\u793a\u65f6，\u90fd\u4f1a\u6d89\u53ca\u5230\u4e09\u79cd\u8868\u793a\u65b9\u6cd5： \u201c\u88f8\u6307\u9488\u201d（\u94fe\u8868\u7684\u4e00\u79cd\u8868\u73b0\u65b9\u5f0f，\u8868\u73b0\u4e3a\u65e0\u7ed3\u6784\u4f53\u5c01\u88c5\u8868\u5934\u7684\u88f8\u9732\u5934\u6307\u9488）\u3001\u5934\u6307\u9488\u3001\u5934\u8282\u70b9，\u8fd9\u662f\u6700\u57fa\u7840\u7684\u6982\u5ff5\u3002<\/p>\n

typedef struct link_node{
\n element_t data;
\n struct link_node *next;
\n}LNode; <\/p>\n

\"\"<\/p>\n

[\u5b9e\u73b0\u94fe\u8868\u7684\u57fa\u7840\u8282\u70b9] \u00a0data\u8868\u793a\u6570\u636e\u57df，next\u8868\u793a\u6307\u9488\u57df\u3002<\/p>\n

\"\"<\/p>\n

\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u7531\u4e8e\u94fe\u8868\u79bb\u6563\u50a8\u5b58\u7684\u6027\u8d28，\u6211\u4eec\u60f3\u8981\u77e5\u9053\u4e00\u4e2a\u8282\u70b9\u5b58\u50a8\u7740\u4ec0\u4e48\u6837\u7684\u4fe1\u606f，\u524d\u63d0\u662f\u6709\u6307\u5411\u8be5\u8282\u70b9\u7684\u6307\u9488\u3002\u5982\u6b64\u4e00\u6765，\u6bcf\u4e2a\u8282\u70b9\u90fd\u6709\u4e00\u4e2a\u524d\u7f6e\u8282\u70b9\u7684next\u6307\u5411\u5b83，\u4ee5\u4fdd\u8bc1\u6570\u636e\u4e0d\u4f1a\u5728\u832b\u832b\u4eba\u6d77\u4e2d\u4e22\u5931\u3002\u7136\u800c，\u8fd9\u6837\u7684\u6307\u5411\u603b\u9700\u8981\u4e00\u4e2a\u8d77\u5934，\u6bd5\u7adf\u73b0\u5b9e\u652f\u6491\u4e0d\u4e86\u5e0c\u5c14\u4f2f\u7279\u9152\u5e97\u7684\u65e0\u9650\u89c4\u6a21\u3002\u4f60\u53ef\u80fd\u4f1a\u60f3\u5230\u5934\u5c3e\u76f8\u63a5\u7684\u5faa\u73af\u94fe\u8868\u3002\u975e\u5e38\u806a\u660e！\u4f46\u5faa\u73af\u94fe\u8868\u5e76\u4e0d\u662f\u6211\u4eec\u672c\u6b21\u8ba8\u8bba\u7684\u91cd\u70b9，\u8fd9\u7684\u786e\u662f\u4e00\u79cd\u65b9\u6cd5\u3002\u987a\u7740\u601d\u8def，\u6211\u4eec\u53d1\u73b0\u9700\u8981\u4e00\u4e2a\u8868\u5934\u6765\u7ba1\u7406\u8fd9\u4e9b\u5bb9\u6613\u8dd1\u4e22\u7684\u6307\u9488\u3002<\/p>\n

\"\"<\/p>\n<\/p>\n

[\u88f8\u6307\u9488\u8868\u793a\u7684\u5934\u8282\u70b9] \u00a0<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5982\u6b64，\u5c31\u975e\u5e38\u81ea\u7136\u7684\u5f62\u6210\u4e86\u201c\u88f8\u6307\u9488\u201d\u7684\u8868\u793a\u65b9\u6cd5\u3002（\u4e0b\u6587\u4e0d\u518d\u6807\u6ce8\u5f15\u53f7，\u65e0\u7279\u522b\u8bf4\u660e\u65f6，\u201c\u88f8\u6307\u9488\u201d\u5168\u90fd\u7279\u6307\u8fd9\u79cd\u94fe\u8868\u7684\u8868\u793a\u65b9\u5f0f\u800c\u4e0d\u662f\u6307\u9488\u672c\u8eab）<\/p>\n

\n

2.\u94fe\u8868\u7684\u7edf\u4e00<\/h4>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u4f5c\u4e3a\u521d\u5b66\u8005，\u4f60\u4f1a\u4e0d\u7981\u601d\u8003，\u8fd9\u6837\u81ea\u7136\u7684\u8868\u793a\u65b9\u6cd5\u4e0d\u662f\u8db3\u591f\u4e86\u5417？\u6211\u4eec\u4f55\u5fc5\u5927\u8d39\u5468\u7ae0\u5730\u53bb\u989d\u5916\u5c01\u88c5\u7ed3\u6784\u4f53\u4f5c\u4e3a\u4e00\u4e2a\u8868\u5934？\u8fd9\u4f3c\u4e4e\u7834\u574f\u4e86\u94fe\u8868\u7684\u7edf\u4e00\u6027\u2014\u2014\u8fd9\u4e5f\u662f\u5728\u6211\u521d\u5b66\u65f6\u671f\u56f0\u6270\u8fc7\u6211\u7684\u4e00\u4e2a\u95ee\u9898\u3002\u5b9e\u5219\u6070\u6070\u76f8\u53cd，\u53ea\u6709\u5f53\u6211\u4eec\u5b9e\u9645\u64cd\u4f5c\u540e\u5c31\u4f1a\u660e\u767d，\u6211\u4eec\u6240\u5199\u7684\u64cd\u4f5c\u51fd\u6570，\u5927\u591a\u90fd\u662f\u4ee5\u8282\u70b9\u4e3a\u5355\u5143\u8fdb\u884c\u64cd\u4f5c，\u800c\u88f8\u6307\u9488\u7684\u5b58\u5728\u5c06\u4f1a\u6253\u7834\u8fd9\u4e00\u7edf\u4e00\u7684\u903b\u8f91\u3002\u4f8b\u5982\u5934\u63d2\u6cd5\u7684\u5b9e\u73b0：<\/p>\n

\/\/\u5185\u7f6e\u8f85\u52a9\u51fd\u6570，\u76f4\u63a5\u64cd\u63a7\u8282\u70b9，\u7528\u4e8e\u7edf\u4e00\u63d2\u5165\u903b\u8f91
\nstatic int insertLNode(LNode* prev,element_t val){
\nLNode* node = (LNode*)malloc(sizeof(LNode));
\n if(!node) return 0;
\n node->data = val;
\nnode->next = prev->next;
\n prev->next = node;
\n return 1;
\n} <\/p>\n

\"\"<\/p>\n

…
\n LNode* prev = &header;\/\/\u9519\u8bef\u5199\u6cd5
\n if(insertLNode(prev,val)) {
\n num++;
\n }
\n… <\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u4ece\u52a8\u753b\u53ef\u4ee5\u5f88\u65b9\u4fbf\u5730\u770b\u51fa，\u6211\u4eec\u5728\u63d2\u5165\u8282\u70b9\u65f6，\u4e3a\u4e86\u7ef4\u62a4\u94fe\u8868，\u907f\u514d\u4e22\u5931，\u5fc5\u987b\u8ba9\u65b0\u8282\u70b9\u7684next\u6765\u63a5\u66ffhead\u6307\u9488\u7684\u5de5\u4f5c，\u4e4b\u540ehead\u624d\u80fd\u653e\u5fc3\u79fb\u5f00，\u5426\u5219\u5c31\u4f1a\u76f4\u63a5\u9020\u6210\u4e22\u5931\u3002\u52a8\u753b\u867d\u7136\u65b9\u4fbf，\u4f46\u6307\u9488\u7684\u79fb\u52a8\u5374\u6ca1\u6709\u8fd9\u4e48\u8f7b\u677e\u3002\u5f53\u6211\u4eec\u5c1d\u8bd5\u5411\u4e0a\u8ff0\u4ee3\u7801\u4e00\u6837\u63cf\u8ff0\u63d2\u5165\u8fc7\u7a0b\u65f6，\u5f88\u5feb\u5c31\u4f1a\u53d1\u73b0\u3002head\u4f5c\u4e3a\u88f8\u6307\u9488\u6ca1\u6709\u5b9e\u8d28\u7684\u8282\u70b9\u3002\u8fd9\u4e5f\u5bfc\u81f4prev->next\u5b9e\u9645\u662f\u9996\u5143\u8282\u70b9\u7684next，\u7b2c\u4e00\u4e2a\u8282\u70b9\u7684\u5143\u7d20\u59cb\u7ec8\u65e0\u6cd5\u6539\u53d8\u4f4d\u7f6e\u3002\u53ea\u4f1a\u63d2\u5165\u5728\u5b83\u7684\u540e\u7eed\u4f4d\u7f6e\u3002\u4e0d\u4ec5\u5982\u6b64，\u5f53\u7a7a\u8868\u65f6\u5982\u679c\u5c06head\u4f5c\u4e3aprev\u7684\u5b9e\u53c2\u4f20\u5165，\u5c06\u4f1a\u76f4\u63a5\u5bfc\u81f4\u5d29\u6e83\u3002\u8fd9\u4e5f\u662f\u6211\u4eec\u5c01\u88c5\u8868\u5934\u7684\u539f\u56e0\u4e4b\u4e00\u3002<\/p>\n

\/\/\u5e26\u5934\u8282\u70b9\u7684\u94fe\u8868
\ntypedef struct {
\n LNode header;
\n int num;
\n}LinkTable;
\n\/\/\u5e26\u5934\u6307\u9488\u7684\u94fe\u8868
\ntypedef struct {
\n LNode* ptr_head;
\n int num;
\n}LinkList; <\/p>\n

\"\"<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5e26\u5934\u8282\u70b9\u7684\u94fe\u8868\u7684\u786e\u80fd\u89e3\u51b3\u521a\u624d\u7684\u95ee\u9898，\u4f46\u5e26\u5934\u6307\u9488\u7684\u94fe\u8868\u597d\u50cf\u8ddf\u521a\u624d\u88f8\u9732\u6307\u9488\u7684\u60c5\u51b5\u76f8\u6bd4\u4e5f\u6ca1\u5dee，\u4ec5\u4ec5\u662f\u589e\u52a0\u4e86\u4e00\u4e2a\u7528\u4e8e\u8ba1\u8282\u70b9\u6570\u7684int\u53d8\u91cfnum\u3002\u7684\u786e，\u5934\u6307\u9488\u548c\u521a\u624d\u5e76\u6ca1\u6709\u591a\u5927\u533a\u522b，\u4f46\u662f\u5728\u4f7f\u7528\u88f8\u9732\u6307\u9488\u7684\u60c5\u51b5\u4e0b，\u6211\u4eec\u4f1a\u9762\u4e34\u4e00\u4e2a\u5f88\u591a\u65b0\u624b\u5bb9\u6613\u683d\u7684\u5751\u2014\u2014\u4fee\u6539\u5f62\u53c2\u800c\u672a\u6539\u5b9e\u53c2\u3002<\/p>\n

\u89e3\u51b3\u65b9\u6cd5<\/p>\n

1.\u8fd4\u56de\u503c\u66f4\u65b0<\/p>\n

2.\u4f20\u4e8c\u7ea7\u6307\u9488<\/p>\n

3.\u7ed3\u6784\u4f53\u5c01\u88c5<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u8054\u60f3\u4e00\u4e0b\u4f60\u5f53\u521d\u5b66\u4e60\u6307\u9488\u65f6\u7684\u573a\u666f\u3002\u6211\u4eec\u7684\u9009\u62e9\u662f\u8981\u4e48\u5c06\u51fd\u6570\u7684\u4fee\u6539\u90e8\u5206\u4f5c\u4e3a\u8fd4\u56de\u503c\u8fd4\u56de，\u8981\u4e48\u76f4\u63a5\u5728\u51fd\u6570\u5185\u90e8\u89e3\u5f15\u7528\u6307\u9488\u3002\u5728\u8fd9\u91cc\u4e5f\u662f\u5982\u6b64，\u53ea\u4e0d\u8fc7\u8981\u5728\u51fd\u6570\u5185\u4fee\u6539\u6307\u9488（\u7c7b\u4f3cprev = prev->next;\u7684\u64cd\u4f5c），\u5219\u9700\u8981\u4f7f\u7528\u4e8c\u7ea7\u6307\u9488\u3002\u8fd9\u4f1a\u5e26\u6765\u7406\u89e3\u95e8\u69db\u9ad8\u3001\u5bb9\u6613\u51fa\u9519\u3001\u9605\u8bfb\u6027\u5dee\u7b49\u8bf8\u591a\u95ee\u9898\u3002\u800c\u7ed3\u6784\u4f53\u5219\u66f4\u52a0\u7075\u6d3b\u3001\u5b89\u5168\u3001\u6613\u7ef4\u62a4\u3002\u79cd\u79cd\u7279\u6027，\u4ee5\u53ca\u539f\u56e0，\u5728\u8fd9\u91cc\u5c31\u4e0d\u5c55\u5f00\u8bf4\u4e86，\u76f4\u63a5\u7ed9\u51fa\u4e24\u79cd\u60c5\u51b5\u5bf9\u5e94\u7684\u5934\u63d2\u6cd5\u4ee3\u7801：<\/p>\n

\/\/\u5e26\u5934\u8282\u70b9
\nvoid insertHeaderTable(LinkTable *table,element_t val) {
\n LNode* prev = &table->header;
\n if(insertLNode(prev,val)) {
\n table->num++;
\n }
\n}
\n\/\/\u5e26\u5934\u6307\u9488
\nvoid insertHeaderList(LinkList* list,element_t val) {
\n LNode header;
\n header.next = list->ptr_head;
\n LNode* prev = &header;
\n if (insertLNode(prev,val)) {
\n list->ptr_head = header.next;
\n list->num++;
\n }
\n}<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u4e3a\u4e86\u89e3\u51b3\u524d\u7f6e\u8282\u70b9\u7684\u95ee\u9898，\u6211\u4eec\u9009\u62e9\u7528\u4e00\u4e2a\u4e0d\u5b58\u653e\u6570\u636e\u7684\u8282\u70b9\u4f5c\u4e3a\u54e8\u5175\u8282\u70b9，\u6765\u8f85\u52a9\u5934\u63d2\u6cd5\u7684\u903b\u8f91\u7edf\u4e00\u3002\u5bf9\u4e8e\u5934\u6307\u9488\u7684\u60c5\u51b5，\u6211\u4eec\u53ea\u9700\u5728\u51fd\u6570\u6808\u7a7a\u95f4\u4e0a\u81ea\u52a8\u5206\u914d\u5934\u8282\u70b9，\u5e76\u968f\u51fd\u6570\u6808\u5e27\u9500\u6bc1\u800c\u81ea\u52a8\u56de\u6536，\u5373\u53ef\u5b9e\u73b0\u548c\u5e26\u5934\u7ed3\u70b9\u94fe\u8868\u64cd\u4f5c\u903b\u8f91\u7684\u7edf\u4e00，\u65e0\u9700\u533a\u5206\u7a7a\u8868\u4e0e\u975e\u7a7a\u8868\u7684\u8fb9\u754c\u60c5\u51b5\u3002<\/p>\n

\n

3.\u54d1\u5143\u8282\u70b9（\u865a\u62df\u5934\u8282\u70b9）<\/h4>\n

\u8bf4\u5b8c\u4e86\u5c01\u88c5\u8868\u5934\u7684\u8bf8\u591a\u597d\u5904，\u4f46\u5728leetcode\u4e0a\u9898\u76ee\u5927\u591a\u4e0d\u4f1a\u989d\u5916\u5c01\u88c5\u7ed3\u6784\u4f53，\u800c\u662f\u91c7\u7528\u8fd4\u56de\u503c\u66f4\u65b0\u7684\u65b9\u5f0f\u5f00\u653e\u4f5c\u7b54\u63a5\u53e3\u4f9b\u6211\u4eec\u7b54\u9898\u3002\u6211\u4eec\u4ecd\u7136\u53ef\u4ee5\u6548\u4eff\u4e4b\u524d\u7684\u903b\u8f91\u3002\u5206\u914d\u54d1\u5143\u8282\u70b9dummy\u3002<\/p>\n

LNode* insertLink(LNode* head,element_t val) {
\n LNode dummy;
\n dummy.next = head;
\n LNode* prev = &dummy;
\n if (insertLNode(prev,val)) {
\n return dummy.next;\/\/ <————
\n }
\n printf("insertLink Failed!\\\\n");
\n return head;
\n} <\/p>\n

\u8fd9\u91cc\u503c\u5f97\u6ce8\u610f\u7684\u662f，\u7bad\u5934\u6807\u8bb0\u5904\u4e3a\u4f55\u8981\u8fd4\u56dedummy.next？<\/p>\n

\"\"<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u901a\u8fc7\u56fe\u7247\u53ef\u4ee5\u76f4\u89c2\u7406\u89e3，\u54d1\u5143\u8282\u70b9\u53ea\u662f\u8d77\u4e34\u65f6\u7684\u8f85\u52a9\u4f5c\u7528，\u4f1a\u5728\u51fd\u6570\u6808\u5e27\u9500\u6bc1\u65f6\u968f\u4e4b\u88ab\u56de\u6536\u3002\u5982\u679c\u6211\u4eec\u4e0d\u901a\u8fc7\u8fd4\u56de\u503c\u53bb\u66f4\u65b0\u9996\u5143\u8282\u70b9\u7684\u5730\u5740head\u5219\u662f\u505a\u4e86\u65e0\u7528\u529f\u3002\u56e0\u4e3a\u63d2\u5165\u65b0\u7684\u8282\u70b9\u65f6，\u5934\u6307\u9488\u5e94\u8be5\u968f\u4e4b\u6539\u53d8\u3002\u5176\u4ed6\u7684\u64cd\u4f5c\u903b\u8f91，\u6b64\u5904\u5c31\u4e0d\u8fc7\u591a\u5c55\u5f00\u4e86\u3002\u6982\u5ff5\u5341\u5206\u7b80\u5355，\u5982\u679c\u4f60\u611f\u5230\u7406\u89e3\u56f0\u96be，\u8bf7\u52a1\u5fc5\u5148\u4e0a\u624b\u6572\u6572\u952e\u76d8，\u753b\u753b\u56fe，\u8fd9\u5c06\u6709\u52a9\u4e8e\u4f60\u7406\u89e3\u548c\u719f\u6089\u3002<\/p>\n<\/p>\n

\u63a5\u4e0b\u6765\u8fdb\u5165\u5b9e\u6218\u90e8\u5206\u3002<\/p>\n

\n

\u4e8c\u3001\u8be6\u7ec6\u89e3\u6790<\/h3>\n

1.\u53cd\u8f6c\u94fe\u8868-\u7b80\u5355<\/h4>\n

\"\"<\/p>\n

\"\"<\/p>\n

\u4f5c\u7b54\u63a5\u53e3：<\/p>\n

\/**
\n * Definition for singly-linked list.
\n * struct ListNode {
\n * int val;
\n * struct ListNode *next;
\n * };
\n*\/
\nstruct ListNode* reverseList(struct ListNode* head) {
\n \/\/\u6b64\u5904\u586b\u5199\u4ee3\u7801
\n} <\/p>\n

\n

\"\"<\/p>\n

1.1\u9898\u76ee\u5206\u6790<\/p>\n

\u5148\u8bf4\u7ed3\u8bba：\u770b\u5230 \u53cd\u8f6c\u94fe\u8868，\u76f4\u63a5\u53cd\u5e94\u5230\u8003\u201c\u6307\u9488\u53cd\u8f6c\u201d\u7684\u6838\u5fc3\u64cd\u4f5c，\u6709\u4e09\u79cd\u89e3\u9898\u65b9\u6cd5：<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u65f6\u95f4\u590d\u6742\u5ea6 \u7a7a\u95f4\u590d\u6742\u5ea6<\/p>\n

1.\u5934\u63d2\u6cd5\u00a0 \u00a0 \u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0O(n)\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 O(1)<\/p>\n

2.\u9012\u5f52\u6cd5\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 O(n)\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0O(n)<\/p>\n

3.\u8fed\u4ee3\u6cd5 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0O(n)\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0O(1)\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u201c\u6700\u4f18\u89e3\u201d\u00a0<\/p>\n<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u6a21\u5f0f\u8bc6\u522b\u540e，\u7acb\u523b\u8c03\u7528\u53cc\u6307\u9488\u8fed\u4ee3\u56fa\u5316\u7684\u6a21\u677f，\u5206\u522b\u7528\u4e24\u4e2a\u6307\u9488\u8bb0\u5f55\u201c\u524d\u9a71\u201d\u548c\u201c\u5f53\u524d\u201d，\u904d\u5386\u8fc7\u7a0b\u4e2d\u5b8c\u6210\u53cd\u8f6c\u3002<\/p>\n

struct ListNode* reverseList(struct ListNode* head) {
\n struct ListNode *prev = NULL；
\n struct ListNode *curr = head;
\n while (curr) {
\n struct ListNode* next = curr->next;
\n curr->next = prev;
\n prev = curr;
\n curr = next;
\n }
\n return prev;
\n} <\/p>\n

\u9700\u8981\u6ce8\u610f\u7684\u662f，\u4e09\u79cd\u65b9\u6cd5\u7684\u6289\u62e9\u5e76\u4e0d\u662f\u8003\u573a\u6216\u9762\u8bd5\u65f6\u4e34\u65f6\u601d\u8003\u7684\u5185\u5bb9，\u800c\u662f\u4e4b\u524d\u5b66\u4e60\u8fc7\u7a0b\u4e2d\u79ef\u7d2f\u7684\u7ecf\u9a8c\u3002\u8be6\u89e3\u7a0d\u540e\u89c1\u7b2c\u4e09\u90e8\u5206\u3002<\/p>\n

\"\"<\/p>\n

*\u9700\u8981\u6ce8\u610f\u7684\u662f\u52a8\u753b\u6700\u540enext\u8fd8\u8fdb\u884c\u4e86\u79fb\u52a8，\u5b9e\u9645\u6ca1\u6709\u53d1\u751f，next\u5728\u5b9e\u9645\u64cd\u4f5c\u4e2d\u53ea\u662f\u4e34\u65f6\u53d8\u91cf，\u548ccurr\u7ed1\u5b9a\u5728\u4e00\u8d77\u53ea\u4e3a\u4e86\u65b9\u4fbf\u52a8\u753b\u6f14\u793a\u3002<\/p>\n

\n

1.2\u601d\u8def\u63a8\u5bfc<\/p>\n

\"\"<\/p>\n

\u6b63\u9898<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5f53\u6211\u4eec\u7b2c\u4e00\u6b21\u63a5\u89e6\u8fd9\u9898\u65f6，\u6211\u4eec\u4e0d\u4f1a\u4ece\u4e00\u5f00\u59cb\u5c31\u8bbe\u60f3\u901a\u8fc7\u53cc\u6307\u9488\u8fed\u4ee3\u53bb\u8fdb\u884c\u4e00\u4e2a\u53cd\u8f6c\u6307\u9488\u7684\u64cd\u4f5c\u3002（\u4e0d\u6392\u9664\u60a8\u975e\u5e38\u806a\u660e）\u6b63\u5e38\u7684\u601d\u7ef4\u5e94\u5f53\u662f\u4ece\u6211\u4eec\u3010\u4f1a\u4ec0\u4e48\u3011\u5f00\u59cb\u3002\u6211\u53ef\u4ee5\u8bbe\u60f3\u91cd\u65b0\u521b\u5efa\u4e00\u4e2a\u94fe\u8868，\u6bcf\u6b21\u8bfb\u53d6\u9898\u76ee\u94fe\u8868\u7684\u6700\u540e\u4e00\u4f4d，\u7136\u540e\u4f9d\u6b21\u5f80\u524d，\u8d4b\u503c\u7ed9\u65b0\u7684\u94fe\u8868\u3002\u8bda\u7136，\u8fd9\u6837\u7684\u65b9\u6cd5\u5f88\u201c\u8822\u201d，\u5374\u53ef\u4ee5\u4f5c\u4e3a\u6211\u4eec\u601d\u8003\u7684\u8d77\u70b9\u3002<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u6709\u4e86\u8fd9\u4e2a\u601d\u8003\u951a\u70b9\u8fc7\u540e，\u6211\u4eec\u5e94\u8be5\u7740\u624b\u601d\u8003\u5b83\u4e3a\u4ec0\u4e48\u76f4\u89c9\u4e0a\u5c31\u5f88\u201c\u8822\u201d？\u6362\u8a00\u4e4b\u5f0a\u7aef\u5728\u54ea？<\/p>\n

\u53cd\u9898<\/p>\n

1.\u9898\u5e72\u7ed9\u51fa\u4e3a\u5355\u5411\u94fe\u8868，\u4ece\u5c3e\u5230\u5934\u8bfb\u53d6\u5fc5\u7136\u6548\u7387\u6781\u4f4e O（n\u00b2）<\/p>\n

2.\u903b\u8f91\u5197\u4f59，\u770b\u4f3c\u7b26\u5408\u76f4\u89c9，\u5b9e\u9645\u4ee3\u7801\u4e3a\u4e86\u56f4\u7ed5\u601d\u8003\u951a\u70b9\u8f6c\u4f1a\u51fa\u73b0\u5927\u91cf\u53ef\u76f4\u63a5\u5316\u7b80\u7684\u5197\u4f59\u3002<\/p>\n

3.\u989d\u5916\u5360\u7528 O(n) \u7684\u7a7a\u95f4，\u8fd9\u79cd\u505a\u6cd5\u751a\u81f3\u53ef\u4ee5\u53d8\u4e3a\u76f4\u63a5\u8bfb\u53d6\u5b58\u5165\u6570\u7ec4，\u518d\u65b0\u5efa\u94fe\u8868，\u7b26\u5408\u76f4\u89c9\u4f46\u7a7a\u95f4\u5f00\u9500\u5927<\/p>\n

\u6211\u4eec\u9010\u4e2a\u53bb\u89e3\u51b3\u8fd9\u4e9b\u5f0a\u7aef，\u770b\u770b\u80fd\u4e0d\u80fd\u5f97\u5230\u4e00\u4e2a\u6700\u7ec8\u4f18\u5316\u7248\u672c，\u800c\u8fd9\u4e2a\u7248\u672c\u81f3\u5c11\u80fd\u4e3a\u6211\u4eec\u5f00\u8def\u3002<\/p>\n<\/p>\n

\u80fd\u4e0d\u80fd\u4ece\u5934\u5230\u5c3e？\u2014\u2014\u4f18\u5316\u904d\u5386\u65b9\u5f0f<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u653e\u5f03\u4ece\u5c3e\u5230\u5934\u8bfb\u53d6，\u6539\u4e3a\u6b63\u5411\u904d\u5386，\u6211\u4eec\u5148\u5047\u8bbe\u628a\u94fe\u8868\u7684\u6570\u636e\u5168\u90e8\u8bfb\u5165\u6570\u7ec4\u3002\u53ea\u8fdb\u884c\u4e86\u4e00\u6b21O(n)\u7684\u5fc5\u7136\u9700\u8981\u7684\u8bfb\u53d6\u64cd\u4f5c<\/p>\n

\u80fd\u5426\u627e\u5230\u4e0d\u7528\u4e3b\u52a8\u8d34\u5408\u7684\u95ed\u73af\u903b\u8f91？\u2014\u2014\u4f18\u5316\u5b9e\u73b0\u903b\u8f91<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5148\u4e0d\u7ba1\u7a7a\u95f4\u6216\u65f6\u95f4，\u521a\u624d\u6211\u4eec\u8fc7\u5ea6\u5173\u6ce8\u5b9e\u73b0\u7684\u8fc7\u7a0b，\u73b0\u5728\u4e0d\u59a8\u91cd\u65b0\u805a\u7126\u76ee\u7684\u2014\u2014\u9700\u8981\u4e00\u4e2a\u65b0\u94fe\u8868，\u90a3\u5c31\u53ef\u4ee5\u7528\u6211\u4eec\u5df2\u7ecf\u56fa\u5316\u7684\u5934\u63d2\u6cd5\u903b\u8f91\u6765\u5c1d\u8bd5\u5b9e\u73b0\u903b\u8f91\u95ed\u5408\u3002<\/p>\n

\u80fd\u4e0d\u80fd\u539f\u5730\u53d8\u6362 ？\u2014\u2014\u4f18\u5316\u7a7a\u95f4\u4f7f\u7528<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u539f\u5730\u53d8\u6362，\u4e3a\u4e86\u4f18\u5316\u7a7a\u95f4，\u9898\u76ee\u7ed9\u51fa\u7684\u94fe\u8868\u5404\u4e2a\u8282\u70b9\u672c\u8eab\u6240\u5360\u7a7a\u95f4\u5c31\u6781\u5176\u5b9d\u8d35\u3002\u5982\u540c\u7a7f\u73e0\u5b50\u4e00\u6837，\u73e0\u5b50\u672c\u8eab\u4e0d\u52a8，\u4f46\u6211\u4eec\u53ef\u4ee5\u53cd\u8fc7\u6765\u7a7f，\u53ea\u9700\u8c03\u8f6c\u6307\u9488\u65b9\u5411\u5373\u53ef\u4f18\u5316<\/p>\n

\u5408\u9898<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u6211\u4eec\u53ef\u4ee5\u5c1d\u8bd5\u8fdb\u884c\u7b80\u5355\u7684\u6392\u5217\u7ec4\u5408\u770b\u770b\u4f1a\u53d1\u751f\u4ec0\u4e48\u3002<\/p>\n

\n

1.2.1\u5934\u63d2\u6cd5<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u7efc\u5408\u4e24\u70b9，\u6211\u4eec\u65e2\u9700\u8981\u6b63\u5411\u904d\u5386，\u53c8\u8981\u7528\u5934\u63d2\u6cd5\u7684\u56fa\u5316\u903b\u8f91，\u4e14\u6682\u65f6\u4e0d\u8003\u8651\u7a7a\u95f4\u95ee\u9898\u3002\u4e0d\u59a8\u65b0\u5efa\u4e00\u4e2a\u94fe\u8868\u8bd5\u8bd5\u770b\u3002<\/p>\n

\u5f53\u6211\u4eec\u51c6\u5907\u63d2\u5165\u65b0\u8282\u70b9\u7684\u9002\u5408，\u81ea\u7136\u60f3\u5230，\u6211\u53ef\u4ee5\u76f4\u63a5\u5229\u7528\u9898\u7ed9\u7684\u94fe\u8868\u7a7a\u95f4\u800c\u65e0\u9700\u4e3b\u52a8\u7533\u8bf7\u548c\u9500\u6bc1\u5806\u7a7a\u95f4\u3002\u5982\u6b64\u4e00\u6765，\u5f0a\u7aef3\u4e5f\u88ab\u987a\u5e26\u89e3\u51b3\u4e86\u3002<\/p>\n

\u6211\u4eec\u60f3\u5230\u76f4\u63a5\u62ff\u8282\u70b9\u6765\u7528，\u4f46\u9996\u5143\u8282\u70b9\u8fd8\u542b\u6709\u540e\u9762\u7684\u8282\u70b9\u7684\u4fe1\u606f\u3002\u4e8e\u662f\u6211\u4eec\u53ef\u4ee5\u65b0\u5efa\u6307\u9488ListNode*curr\u6765\u4fdd\u62a4\u540e\u7eed\u8282\u70b9\u3002\u6b64\u65f6\u9996\u5143\u8282\u70b9\u5f7b\u5e95\u81ea\u7531，\u4e0b\u4e00\u6b65\u5b83\u9700\u8981\u89e3\u653e\u4e0a\u4e00\u4e2a\u8282\u70b9，\u867d\u8bf4\u54d1\u5143\u8282\u70b9\u76f4\u63a5\u6307\u5411NULL，\u4f46\u6211\u4eec\u4e5f\u89c6\u4f5c\u4fdd\u62a4\u5bf9\u8c61，\u5982\u6b64\u4e00\u6765\u5c31\u7edf\u4e00\u4e86\u4ee3\u7801\u903b\u8f91\u3002\u63a5\u7740\u63a8\u6f14，\u5f53\u524d\u7f6e\u8282\u70b9\u7684next\u88ab\u89e3\u653e\u540e，\u5c31\u53ef\u4ee5\u76f4\u63a5\u6307\u5411\u4e0b\u4e00\u4e2a\u8282\u70b9\u3002\u8fd9\u4e2a\u65f6\u5019\u6211\u4eec\u60ca\u8bb6\u7684\u53d1\u73b0，\u9006\u8f6c\u6307\u9488\u7684\u64cd\u4f5c\u88ab\u6211\u4eec\u7528\u4e00\u79cd\u7c7b\u4f3c\u5165\u6808\u7684\u65b9\u5f0f\u89e3\u51b3\u4e86，\u7531\u4e8e\u5148\u5165\u540e\u51fa，\u538b\u5165\u5e95\u90e8\u7684\u8282\u70b9\u4e5f\u5c31\u4ece\u9996\u5143\u8282\u70b9\u7ffb\u8f6c\u4e3a\u5c3e\u8282\u70b9\u3002<\/p>\n

\"\"<\/p>\n

\u9700\u8981\u6ce8\u610f\u7684\u662f，curr\u4e00\u5f00\u59cb\u4e0d\u5e94\u8be5\u6307\u5411NULL，\u800c\u5e94\u8be5\u6307\u5411\u5934\u8282\u70b9，\u6b64\u5904\u7eaf\u5c5e\u6f14\u793a\u5931\u8bef，\u4f46\u65e0\u4f24\u5927\u96c5\u3002<\/p>\n

\u4ee3\u7801\u5b9e\u73b0\u5982\u4e0b:<\/p>\n

typedef struct ListNode ListNode;
\nstruct ListNode* reverseList(struct ListNode* head) {
\n ListNode dummy; \/\/\u54d1\u5143or\u865a\u62df\u5934\u8282\u70b9
\n dummy.next = NULL;
\n ListNode* curr = head;\/\/\u4e0d\u80fd\u4e3aNULL，\u786e\u4fdd\u80fd\u8fdb\u5faa\u73af
\n while(curr){
\n curr = head->next;\/\/\u4fdd\u62a4\u540e\u7eed\u6307\u9488
\n head->next = dummy.next;\/\/head->next \u5373\u5f53\u524d\u8282\u70b9\u7684next\u88ab\u89e3\u653e，\u8fdb\u800c\u89e3\u653e\u54d1\u5143\u8282\u70b9\u7684\u5de5\u4f5c
\n dummy.next = head;\/\/\u540c\u7406
\n head = curr;\/\/\u65b0\u5934\u6362\u65e7\u5934
\n }
\n return dummy.next;\/\/\u8fd4\u56de\u65b0\u94fe\u8868\u7684\u5934，dummy\u968f\u51fd\u6570\u6808\u5e27\u7684\u9500\u6bc1\u968f\u4e4b\u88ab\u56de\u6536
\n} <\/p>\n

\u65f6\u95f4\u590d\u6742\u5ea6：O(N) (while\u5faa\u73af\u904d\u5386\u4e00\u904d\u5168\u90e8\u8282\u70b9)<\/p>\n

\"\"<\/p>\n

\u8fd9\u6837\u5c31\u5df2\u7ecf\u5b9e\u73b0\u4e86\u65f6\u95f4\u590d\u6742\u5ea6\u6700\u4f18\u7684\u89e3\u6cd5,\u4e0d\u59a8\u7ee7\u7eed\u8fdb\u884c\u5176\u4ed6\u65b9\u6cd5\u7684\u5c1d\u8bd5\u3002\u867d\u7136\u521a\u624d\u7a7a\u95f4\u5f00\u9500\u7684\u95ee\u9898\u88ab\u987a\u5e26\u89e3\u51b3\u4e86，\u4f46\u53cd\u8f6c\u6307\u9488\u7684\u60f3\u6cd5\u8fd8\u6ca1\u6709\u8fdb\u884c\u5c1d\u8bd5\u3002\u6211\u4eec\u53ef\u4ee5\u5148\u6765\u8fdb\u884c\u601d\u8003\u5b9e\u9a8c，\u5982\u679c\u6211\u4eec\u4ec0\u4e48\u90fd\u4e0d\u8003\u8651，\u76f4\u63a5\u8c03\u8f6c\u6307\u9488\u4f1a\u53d1\u751f\u4ec0\u4e48\u3002<\/p>\n

\"\"<\/p>\n

\u5f88\u597d，\u4ece\u56fe\u53ef\u4ee5\u770b\u51fa，\u4e94\u53f7\u8282\u70b9\u7684\u6307\u9488\u6210\u529f\u5b8c\u6210\u4e86\u5012\u8f6c，\u867d\u7136\u4e94\u8282\u70b9\u6307\u5411\u7684NULL\u4e0d\u662f\u9700\u8981\u88ab\u4fdd\u62a4\u7684\u5185\u5bb9，\u4f46\u662f\u8fd9\u6837\u7684\u64cd\u4f5c\u4ecd\u7136\u8ba9\u6211\u4eec\u7f3a\u4e4f\u5b89\u5168\u611f\u3002\u6211\u4eec\u7ee7\u7eed\u63a8\u6f14\u3002<\/p>\n

\"\"<\/p>\n

\u8fd9\u4e2a\u65f6\u5019\u95ee\u9898\u5c31\u771f\u6b63\u5730\u66b4\u9732\u51fa\u6765\u4e86，\u56e0\u4e3a\u56db\u53f7\u8282\u70b9\u7684\u804c\u8d23\u51b2\u7a81，\u5b83\u540c\u65f6\u627f\u62c5\u4e86\u4fdd\u62a4\u4e94\u53f7\u8282\u70b9\u548c\u53cd\u8f6c\u64cd\u4f5c\u7684\u8d23\u4efb\u3002\u8fd9\u8ba9\u5b83\u4e0d\u582a\u91cd\u8d1f，\u76f4\u63a5\u653e\u5f03\u4e86\u4e94\u53f7\u8282\u70b9\u3002\u6700\u76f4\u63a5\u7684\u7ed3\u679c\u5c31\u662f\u4e94\u53f7\u8282\u70b9\u7684\u4fe1\u606f\u4e22\u5931\u3002<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u6211\u4eec\u5148\u4e0d\u6025\u7740\u53bb\u201c\u9a6c\u4e0a\u6d3e\u9063\u4e00\u4e2a\u6307\u9488\u7ba1\u7406\u5c3e\u8282\u70b9\u201d\u3002\u6240\u8c13\u8c0b\u5b9a\u800c\u540e\u52a8\u3002\u5148\u4ed4\u7ec6\u601d\u8003\u548c\u5b9e\u9645\u64cd\u4f5c\u76f8\u6bd4，\u6709\u54ea\u4e9b\u9700\u8981\u4f18\u5316\u7684\u90e8\u5206？ \u5206\u62c5\u804c\u8d23\u5f53\u7136\u7b97\u4e00\u4e2a，\u53e6\u5916\u4e00\u4e2a\u91cd\u8981\u7684\u4e8b\u60c5\u5176\u5b9e\u88ab\u6211\u4eec\u5ffd\u7565\u4e86，\u56fe\u7247\u6f14\u793a\u7684\u76f4\u89c2\u6027，\u6211\u4eec\u9884\u8bbe\u4e86\u6211\u4eec\u62e5\u6709\u53ef\u4ee5\u64cd\u63a7\u5168\u5c40\u7684\u6307\u9488\u6307\u5411\u8fd9\u4e2a\u80fd\u529b\u3002\u4f46\u5b9e\u9645\u6211\u5982\u679c\u53bb\u52a8\u5c3e\u8282\u70b9\u7684\u8bdd，\u662f\u9700\u8981\u4ece\u5934\u5230\u5c3e\u5148\u904d\u5386\u4e00\u904d\u94fe\u8868\u7684，\u904d\u5386\u7684\u7ed3\u675f\u6761\u4ef6curr->next = NULL,\u8fd9\u91cc\u76f4\u63a5\u5f62\u6210\u4e86\u5c40\u90e8\u7684\u5faa\u73af，\u4f1a\u5bfc\u81f4\u7ed3\u675f\u6761\u4ef6\u59cb\u7ec8\u4e3a\u5047，\u9020\u6210\u6b7b\u5faa\u73af\u3002\u8fd9\u662f\u5176\u6b21，\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u8ba9\u53cd\u8f6c\u540e\u6307\u5411\u7684\u8282\u70b9\u7684next = NULL\u6765\u89e3\u51b3，\u5982\u679c\u7ee7\u7eed\u63a8\u6f14\u7684\u8bdd\u7684\u786e\u662f\u53ef\u884c\u7684\u3002\u4f46\u6700\u5927\u7684\u95ee\u9898\u5728\u4e8e\u8fd9\u6837\u5f97\u51fa\u7684\u65b9\u6cd5\u65f6\u95f4\u590d\u6742\u5ea6\u4e0a\u754c\u4e3aO(n\u00b2)\u3002\u6211\u4eec\u5728\u627e\u5c3e\u8282\u70b9\u7684\u65f6\u5019\u53ea\u662f\u5728\u5f80\u540e\u627e，\u800c\u4ec0\u4e48\u90fd\u6ca1\u6709\u5e72，\u628a\u5b9d\u8d35\u7684\u904d\u5386\u6b21\u6570\u6d6a\u8d39\u4e86\u3002\u6240\u4ee5\u6211\u4eec\u5e94\u8be5\u805a\u7126\u7684\u662f\u201c\u505a\u4e9b\u4ec0\u4e48\u201d\u3002<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u6700\u66b4\u529b\u7684\u529e\u6cd5\u5c31\u662f，curr\u8d70\u5230\u6bcf\u4e2a\u8282\u70b9\u65f6\u90fd\u7528\u4e00\u4e2a\u6307\u9488\u6307\u7740\u8fd9\u4e2a\u8282\u70b9，\u76f4\u63a5\u7528\u6570\u7ec4\u5b58\u8d77\u6765，\u95ee\u9898\u5728\u4e8e\u9898\u76ee\u6ca1\u6709\u7ed9\u6211\u4eec\u8282\u70b9\u7684\u6570\u91cf\u3002\u4e8e\u662f\u6211\u4eec\u53ef\u4ee5\u5728\u5806\u4e0a\u7ef4\u62a4\u4e00\u4e2a\u52a8\u6001\u6570\u7ec4\u3002\u8fd9\u662f\u53ef\u884c\u7684，\u867d\u7136\u770b\u4e0a\u53bb\u6709\u70b9\u50bb，\u4f46\u662f\u5df2\u7ecf\u975e\u5e38\u8d34\u8fd1\u9012\u5f52\u6cd5\u7684\u5b9e\u73b0\u903b\u8f91\u4e86，\u6211\u4eec\u6b63\u5e38\u53bb\u8bb2\u9012\u5f52\u662f\u600e\u4e48\u53bb\u7406\u89e3\u7684？<\/p>\n

\n

1.2.2\u9012\u5f52\u6cd5<\/p>\n

\"\"<\/p>\n

\u5047\u8bbe\u6211\u4eec\u7684\u53cd\u8f6c\u5de5\u4f5c\u5df2\u7ecf\u505a\u5230\u6700\u540e\u4e00\u6b65，\u6b63\u5982\u52a8\u753b\u6240\u793a，\u53ea\u9700\u8981head->next=NULL\u5373\u53ef\u3002\u6b64\u65f6\u6211\u4eec\u8981\u8fd4\u56de\u7684\u6307\u9488\u662f\u54ea\u4e2a\u5462？newhead4\u3002\u6211\u4eec\u5c06\u8fd9\u4e2a\u8fc7\u7a0b\u62bd\u79bb\u51fa\u6765<\/p>\n

\"\"<\/p>\n

\u5c31\u80fd\u6e05\u6670\u5730\u770b\u51fa，\u9996\u5148\u8ba9head->next->next(\u5373\u8282\u70b92\u7684next)\u6307\u5411head\u6307\u5411\u7684\u76ee\u6807（\u8282\u70b91）\u3002\u518d\u8ba9head->next = NULL\u6765\u89e3\u9664\u201d\u4e92\u6307\u201c\u72b6\u6001\u3002\u63a5\u7740\u6211\u4eec\u8fd4\u56denewhead\u3002\u8fd9\u5c31\u662f\u6574\u4e2areverse\u51fd\u6570\u5e72\u7684\u4e8b\u60c5\u3002\u975e\u5e38\u6e05\u6670，\u975e\u5e38\u5e72\u8106\u3002\u6211\u4eec\u8f93\u5165\u7684\u662f\u5de6\u8fb9\u7684\u6307\u9488\u3002\u8fd4\u56de\u7684\u5374\u662f\u53f3\u8fb9\u7684\u6307\u9488\u3002\u8fd9\u5177\u6709\u67d0\u79cd\u4f20\u9012\u6027\u3002\u56de\u5230\u524d\u9762\u4e94\u4e2a\u7ed3\u70b9\u7684\u94fe\u8868\u56fe\u3002\u6211\u4eec\u73b0\u5728\u53ea\u8981reverse\u5e72\u201d\u4e00\u4ef6\u201c\u4e8b\u60c5\u2014\u2014\u7ed9\u5de6\u8fb9\u7684\u6307\u9488，\u8fd4\u56de\u7ed9\u6211\u53f3\u8fb9\u7684\u6307\u9488\u3002<\/p>\n

typedef struct ListNode ListNode;
\n\/\/\u53ea\u80fd\u5b9e\u73b0\u4e24\u4e2a\u8282\u70b9\u95f4\u6307\u9488\u53cd\u8f6c\u7684reverse\u51fd\u6570
\nstruct ListNode* reverseList(struct ListNode* head) {
\n if(head || head->next) return NULL;
\n ListNode* newhead = head->next;
\n head->next->next = head;
\n head->next = NULL;
\n return newhead;
\n}
\n\/\/\u8c03\u7528\u65f6
\n{
\n ListNode* newhead1 = reverseList(head);
\n ListNode* newhead2 = reverseList(newhead1);
\n\/\/ ……
\n} <\/p>\n

\u8fd9\u6837\u6765\u770b，\u6211\u4eec\u662f\u4e0d\u662f\u8fd8\u5dee\u201d\u4e34\u95e8\u4e00\u811a\u201c？<\/p>\n

ListNode* newhead1 = reverseList(head);
\nListNode* newhead2 = reverseList(newhead1);
\n\/\/……
\n\/\/\u76f8\u5f53\u4e8e–>ListNode* newhead2 =
\n\/\/reverseList(reverseList(…(reverseList(reverseList(head)))…); <\/p>\n

\u628a\u5197\u4f59\u903b\u8f91\u5316\u7b80\u540e，\u6211\u4eec\u5b9e\u9645\u53ea\u9700\u8981\u4f20\u5165head\u5373\u53ef\u5b8c\u6210\u3002\u6211\u4eec\u4e4b\u6240\u4ee5\u8fd8\u8981\u5728\u5916\u9762\u5d4c\u5957\u90a3\u4e48\u591a\u6b21\u662f\u56e0\u4e3a\u6211\u4eec\u628ahead->next\u8fd9\u4e2a\u4e2d\u95f4\u91cf\u7ed9\u62ff\u51fa\u6765\u4e86\u3002\u65e2\u7136\u603b\u662f\u8981\u4fee\u6539\u8fd4\u56de\u503c\u3002\u4e3a\u4ec0\u4e48\u4e0d\u5728\u8fd4\u56de\u4e4b\u524d\u5c31\u6539\u597d\u5462？<\/p>\n

typedef struct ListNode ListNode;
\nstruct ListNode* reverseList(struct ListNode* head) {
\n if(head || head->next) return NULL;
\n ListNode* newhead = reverseList(head->next);
\n head->next->next = head;
\n head->next = NULL;
\n return newhead;
\n} <\/p>\n

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\n

1.2.3\u53cc\u6307\u9488\u8fed\u4ee3\u6cd5<\/p>\n

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\"\"<\/p>\n

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\"\"<\/p>\n

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\"\"<\/p>\n

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\"\"<\/p>\n

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typedef struct ListNode ListNode;
\nstruct ListNode* reverseList(struct ListNode* head){
\n ListNode* curr = head;\/\/\u521d\u59cb\u6307\u5411\u9996\u5143\u8282\u70b9
\n ListNode* prev = NULL;\/\/\u521d\u59cb"\u6307\u5411"NULL
\n while(curr){\/\/curr\u4e3aNULL\u5c31\u7ed3\u675f，\u76f8\u540c\u901f\u5ea6，\u5728prev\u524d\u9762，\u4e0d\u4f1a\u4e22\u5931\u94fe\u8868
\n ListNode* next = curr->next;\/\/\u4e34\u65f6\u4fdd\u62a4\u540e\u7eed\u7684\u8282\u70b9
\n curr->next = prev;\/\/\u5c06prev\u89e3\u653e\u51fa\u6765
\n prev = curr;\/\/\u540c\u7406
\n curr = next;\/\/\u6ce8\u610f\u4e0d\u8981\u4f7f\u7528curr->next,\u5df2\u7ecf\u88ab\u6211\u4eec\u4fee\u6539
\n }
\n return prev;
\n} <\/p>\n<\/p>\n

\n

2.\u5408\u5e76\u4e24\u4e2a\u6709\u5e8f\u94fe\u8868-\u7b80\u5355<\/h4>\n

\"\"<\/p>\n

\"\"<\/p>\n

\u4f5c\u7b54\u63a5\u53e3：<\/p>\n

\/**
\n * Definition for singly-linked list.
\n * struct ListNode {
\n * int val;
\n * struct ListNode *next;
\n * };
\n *\/
\nstruct ListNode* mergeTwoLists(struct ListNode* list1, struct ListNode* list2) {
\n \/\/\u6b64\u5904\u586b\u5199\u4ee3\u7801
\n} <\/p>\n

\n

2.1 \u9898\u76ee\u5206\u6790<\/p>\n

\u7b2c\u4e00\u53cd\u5e94：\u3010\u53cc\u6307\u9488\u3011 + \u3010\u865a\u62df\u5934\u8282\u70b9\u3011 \u53ef\u4ee5\u79d2\u6740<\/p>\n

typedef struct ListNode ListNode;
\nstruct ListNode* mergeTwoLists(struct ListNode* list1, struct ListNode* list2) {
\n if(!list1) return list2;
\n if(!list2) return list1;<\/p>\n

ListNode dummy;
\n dummy.next = NULL;
\n ListNode* prev = &dummy;
\n while(list1 && list2){
\n if(list1->val < list2->val){
\n prev->next = list1;
\n list1 = list1->next;
\n }else{
\n prev->next = list2;
\n list2 = list2->next;
\n }
\n prev = prev->next;
\n }
\n prev->next = list1? list1 : list2;
\n return dummy.next;
\n} <\/p>\n

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\"\"<\/p>\n

\n

2.2 \u601d\u8def\u63a8\u5bfc<\/p>\n

2.2.1 \u8fed\u4ee3\u6cd5（\u4e3b\u94fe\u5b9e\u73b0）<\/p>\n

\"\"<\/p>\n

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\"\"<\/p>\n

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\"\"<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u63d2\u5165\u5230\u6bd4\u8f83\u6570\u7684\u524d\u9762\u8fd8\u662f\u540e\u9762\u5462？\u4ea7\u751f\u8fd9\u4e2a\u7591\u95ee\u5927\u6982\u7387\u662f\u56e0\u4e3a\u5c06\u7b2c\u4e00\u4e2a\u5f85\u63d2\u5165\u8282\u70b9\u63d2\u5165\u4e3b\u94fe\u7684\u9996\u5143\u8282\u70b9\u65f6，\u51fa\u73b0\u4e86\u4e3b\u94fe\u6613\u4f4d\u7684\u60c5\u51b5，\u4e5f\u5c31\u662fhead\u4f1a\u8ddf\u7740\u52a8\u3002<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5982\u679c\u653e\u5728\u540e\u9762，\u5982\u679c\u539f\u672c\u4e3b\u94fe\u662f\u8fde\u7eed\u76f8\u540c\u7684\u503c\u7684\u4f8b\u59821\u30011，\u6211\u4eec\u57281\u4e4b\u540e\u63d2\u5165\u4e00\u4e2a\u66f4\u5927\u7684\u503c，1\u30012\u30011，\u663e\u7136\u4e0d\u884c，\u800c\u4e14\u5982\u679c\u526f\u94fe\u6700\u5c0f\u503c\u6bd4\u4e3b\u94fe\u6700\u5c0f\u503c\u5c0f\u5462？<\/p>\n

\"\"<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u56de\u987e\u524d\u9762，\u6211\u4eec\u5f88\u5feb\u60f3\u5230\u4e86\u7528\u54d1\u5143\u8282\u70b9\u6765\u89e3\u51b3，\u540c\u65f6\u8fd8\u9700prev\u63a5\u5e94\u63d2\u5165\u64cd\u4f5c，\u52a8\u56fe\u53ea\u8003\u8651\u4e86\u4e24\u8868\u7b49\u957f\u7684\u72b6\u51b5，\u6240\u4ee5\u8fd8\u9700\u8865\u4e0a\u5faa\u73af\u540e\u7684\u5904\u7406，\u51fa\u5faa\u73af\u53ea\u53ef\u80fd\u6709\u4e24\u79cd\u60c5\u51b5，\u4e00\u662flist1 = NULL，\u4e8c\u662flist2 = NULL，\u4e0d\u4f1a\u51fa\u73b0\u540c\u65f6\u4e3a\u7a7a\u6307\u9488\u7684\u60c5\u51b5\u3002list1 = NULL\u8bf4\u660elist2\u5269\u4e0b\u7684\u8282\u70b9\u503c\u90fd\u5927\u4e8elist1\u7684\u6700\u5927\u503c，list2 = NULL\u5219\u8bf4\u660e\u94fe\u8868\u5df2\u7ecf\u5b8c\u6210\u3002\u6211\u4eec\u53ef\u4ee5\u7528\u4e09\u76ee\u64cd\u4f5c\u7b26\u7b80\u6d01\u8868\u793a\u3002<\/p>\n

\u76ee\u524d\u4ee3\u7801\u5982\u4e0b：<\/p>\n

typedef struct ListNode ListNode;
\nstruct ListNode* mergeTwoLists(struct ListNode* list1, struct ListNode* list2) {
\n if(!list1) return list2;\/\/list1\u4e0d\u5b58\u5728\u65f6，\u65e0\u9700merge，\u8fd4\u56delist2
\n if(!list2) return list1;\/\/\u540c\u7406
\n ListNode dummy;
\n dummy.next = list1;\/\/\u4ee5list1\u4e3a\u4e3b\u94fe
\n ListNode* prev = &dummy;
\n while(list1 && list2){
\n if(list1->val >= list2->val){
\n prev->next = list2;
\n list2 = list2->next;
\n prev->next->next = list1;
\n prev = prev->next;\/\/\u6ce8\u610f，\u8282\u70b9\u63d2\u5165\u540e，prev\u548clist1\u9694\u5f00\u4e86\u4e00\u4e2a\u8282\u70b9
\n }else{
\n prev = prev->next;
\n list1 = list1->next;
\n }
\n }
\n prev->next = list1? list1 : list2;\/\/\u5982\u679clist1\u8fd8\u5b58\u5728，\u8bf4\u660eprev\u6307\u5411\u7684\u4e0d\u662f\u5c3e\u8282\u70b9，\u5e76\u4e14\u5df2\u7ecf\u5168\u90e8\u63d2\u5165
\n \/\/\u4e0d\u9700\u8981\u989d\u5916\u8c03\u6574，\u4ecd\u7136\u4e3alist1\u3002\u5982\u679c\u4e0d\u5b58\u5728，\u5c31\u63a5\u4e0alist2\u3002
\n return dummy.next;
\n} <\/p>\n

\"\"<\/p>\n

\n

2.2.2 \u8fed\u4ee3\u6cd5（\u5bf9\u79f0\u5b9e\u73b0）<\/p>\n

\u8fd9\u6837，\u6211\u4eec\u8fd8\u662f\u6bd4\u8f83\u7b80\u6d01\u5730\u5b8c\u6210\u4e86\u8fd9\u9053\u9898\u3002\u4f46\u4ecd\u7136\u5b58\u5728\u903b\u8f91\u4e0a\u7684\u5197\u4f59：prev->next->next = list1；\u4ed6\u7684\u4f5c\u7528\u5728\u4e8e\u6bcf\u6b21\u5faa\u73af\u90fd\u7ef4\u62a4\u539flist1\u7684\u94fe\u5f0f\u7ed3\u6784，\u5982\u4e0b\u56fe\u6240\u793a\u3002\u8fd9\u662f\u56e0\u4e3a\u6211\u4eec\u601d\u8def\u88ab\u951a\u5b9a\u5728\u4e86\u4e3b\u94fe\u4e0a，\u6211\u4eec\u201d\u5bb3\u6015\u201c\u4e3b\u94fe\u7684\u5730\u4f4d\u6613\u4f4d，\u56e0\u6b64\u4e3a\u4e86\u7ef4\u62a4\u4e3b\u94fe\u7684\u6b63\u5f53\u6027，\u65e0\u610f\u8bc6\u5730\u9020\u6210\u4e86\u4ee3\u7801\u7684\u5197\u4f59\u3002\u901a\u8fc7\u52a8\u753b\u4e0d\u96be\u6ce8\u610f\u5230，\u5373\u4f7f\u6211\u4eec\u4e0d\u8d70\u8fd9\u4e00\u6b65，\u6211\u4eec\u7684\u4e0b\u4e00\u6b65\u4ecd\u7136\u4f1a\u6bd4\u8f83list1->val\u4e0elist2->val\u7684\u5927\u5c0f，\u8fd9\u65f6\u5019\u5c31\u51b3\u5b9a\u4e86\u6211\u4eec\u6307\u5411\u4f55\u5904\u3002prev->next->next = list1；\u76f8\u5f53\u4e8e\u63d0\u524d\u89c4\u5212\u4e86\u3001\u5185\u5b9a\u4e86\u4e3b\u94fe\u3002\u4f46\u5b9e\u9645\u4e0a\u6211\u4eec\u8981\u7684\u4ece\u6765\u4e0d\u662f\u4e00\u4e2a\u4e0d\u53d8\u7684\u4e3b\u94fe\u5730\u4f4d，\u800c\u662f\u6700\u7ec8\u5f97\u5230\u5408\u5e76\u540e\u7684\u6709\u5e8f\u94fe\u8868\u3002\u4e3b\u94fe\u53ef\u4ee5\u5728\u8fc7\u7a0b\u4e2d\u88ab\u4e0d\u65ad\u5207\u6362\u3002\u56e0\u6b64，dummy.next = list1;\u7684\u521d\u59cb\u5316\u4e5f\u662f\u6ca1\u6709\u610f\u4e49\u7684\u3002<\/p>\n

\"\"<\/p>\n

typedef struct ListNode ListNode;
\nstruct ListNode* mergeTwoLists(struct ListNode* list1, struct ListNode* list2) {
\n if(!list1 || !list2) return list1? list1 : list2;\/\/list1\u4e0d\u5b58\u5728\u65f6，\u65e0\u9700merge，\u8fd4\u56delist2
\n ListNode dummy;
\n dummy.next = NULL;
\n ListNode* prev = &dummy;
\n while(list1 && list2){
\n if(list1->val >= list2->val){
\n prev->next = list2;
\n list2 = list2->next;
\n }else{
\n prev->next = list1;
\n list1 = list1->next;
\n }
\n prev = prev->next;
\n }
\n prev->next = list1? list1 : list2;\/\/\u8c01\u8fd8\u6ca1\u7a7a\u5c31\u6307\u5411\u8c01
\n return dummy.next;
\n} <\/p>\n

\u8fd9\u6837\u5c31\u5f97\u5230\u4e86\u5b8c\u7f8e\u7684\u5408\u5e76\u903b\u8f91，\u5e76\u4e14\u4e0d\u7528\u6ce8\u610fprev\u88ab\u9694\u5f00\u7684\u7279\u6b8a\u60c5\u51b5，\u903b\u8f91\u6e05\u6670\u7edf\u4e00，\u4ee3\u7801\u7b80\u6d01\u597d\u5199\u3002<\/p>\n

\"\"<\/p>\n

\u65f6\u95f4\u590d\u6742\u5ea6： O（n + m）\u7a7a\u95f4\u590d\u6742\u5ea6：O（1）<\/p>\n

\n

2.2.3 \u9012\u5f52\u6cd5<\/p>\n

\u4ece\u56fe\u4e2d\u53ef\u4ee5\u76f4\u89c2\u611f\u53d7\u5230，\u6574\u4e2a\u8fc7\u7a0b\u66f4\u50cf\u662f\u5728\u201d\u4e32\u73e0\u5b50\u201c\u3002\u6bcf\u6b21\u7684\u6838\u5fc3\u6b65\u9aa4\u5176\u5b9e\u53ea\u6709\u4e00\u4e2a\u2014\u2014\u8c01\u5c0f\u5148\u6307\u5411\u8c01\u3002\u627f\u63a5\u53cd\u8f6c\u94fe\u8868\u7684\u9012\u5f52\u601d\u8def，\u6211\u4eec\u4e0d\u6b62\u53ef\u4ee5\u4ece\u5934\u5230\u5c3e，\u8fd8\u53ef\u4ee5\u4ece\u5c3e\u56de\u5934\u3002\u4f9d\u9760\u9012\u5f52\u4ea7\u751f\u7684\u6808\u5e27\u9690\u6027\u5730\u201d\u8bb0\u5fc6\u201c\u4e86\u6bcf\u4e2a\u8282\u70b9\u7684\u6307\u9488\u3002\u4f7f\u5176\u56de\u6eaf\u6027\u5730\u4ece\u540e\u5f80\u524d\u7a7f，\u4ee3\u7801\u5b9e\u73b0\u5982\u4e0b\u3002<\/p>\n

typedef struct ListNode ListNode;
\nstruct ListNode* mergeTwoLists(struct ListNode* list1, struct ListNode* list2) {
\n \/\/ \u8fb9\u754c\u6761\u4ef6
\n if(!list1||!list2) return list1? list1 : list2;
\n \/\/ \u9012\u5f52\u9009\u62e9\u8f83\u5c0f\u7684\u8282\u70b9，\u62fc\u63a5\u540e\u7eed\u7ed3\u679c
\n if (list1->val <= list2->val) {
\n list1->next = mergeTwoLists(list1->next, list2);
\n return list1;
\n } else {
\n list2->next = mergeTwoLists(list1, list2->next);
\n return list2;
\n }
\n} <\/p>\n

\u5982\u6b64\u4e00\u6765\u5c31\u628a\u521d\u59cb\u7684\u5224\u7a7a\u903b\u8f91\u548c\u672b\u5c3e\u7684\u5224\u5b58\u903b\u8f91\u5b8c\u6210\u4e86\u7edf\u4e00，\u903b\u8f91\u66f4\u52a0\u6e05\u6670\u4f18\u7f8e，\u4f46\u662f\u4ecd\u7136\u5b58\u5728\u7a7a\u95f4\u5f00\u9500\u4e0a\u7684\u786c\u4f24\u3002<\/p>\n

\u65f6\u95f4\u590d\u6742\u5ea6O（n + m）\u7a7a\u95f4\u590d\u6742\u5ea6：O(max(n , m)) \u6700\u4f18\u89e3\u4ecd\u7136\u662f\u8fed\u4ee3\u6cd5<\/p>\n<\/p>\n

\n

3.\u5408\u5e76K\u4e2a\u5347\u5e8f\u94fe\u8868 – \u4e2d\u7b49<\/h4>\n<\/p>\n

\"\"<\/p>\n

\"\"<\/p>\n

\u4f5c\u7b54\u63a5\u53e3：<\/p>\n

\/**
\n * Definition for singly-linked list.
\n * struct ListNode {
\n * int val;
\n * struct ListNode *next;
\n * };
\n *\/
\nstruct ListNode* mergeKLists(struct ListNode** lists, int listsSize) {
\n \/\/\u6b64\u5904\u586b\u5199\u4ee3\u7801
\n} <\/p>\n

\n

3.1\u9898\u76ee\u5206\u6790<\/p>\n

\u8fd9\u9053\u9898LeetCode\u5b98\u65b9\u6574\u5408\u65f6\u653e\u5728\u4e86\u56f0\u96be\u9898\u4e2d，\u4e5f\u662f\u94fe\u8868\u4e2d\u5c11\u6570\u7684\u56f0\u96be\u9898，\u4f46\u5176\u5b9e\u9645\u5c31\u7b97\u662f\u6700\u4f18\u89e3\u5206\u652f\u5408\u5e76\u6cd5\u53ea\u80fd\u5230\u4e2d\u7b49\u96be\u5ea6，\u53ea\u662f\u66b4\u529bAC\u4ecd\u7136\u5c5e\u4e8e\u7b80\u5355\u96be\u5ea6\u3002<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0 \u00a0 \u00a0\u65f6\u95f4\u590d\u6742\u5ea6 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u7a7a\u95f4\u590d\u6742\u5ea6<\/p>\n

\u66b4\u529b\u9012\u5f52 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0O(k*n)\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 O(k)<\/p>\n

\u66b4\u529b\u8fed\u4ee3 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0O(k*n) \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0O(1)<\/p>\n

\u4f18\u5148\u961f\u5217 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0O(n*log k) \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0O(k) \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u52a8\u6001k\u65f6\u6700\u4f18\u89e3<\/p>\n

\u5206\u6cbb\u5408\u5e76（\u9012\u5f52\u5f0f） \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0O(n*log k) \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0O(log k)<\/p>\n

\u5206\u6cbb\u5408\u5e76（\u8fed\u4ee3\u5f0f）\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0O(n*log k)\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0O(1)\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u9759\u6001k\u65f6\u6700\u4f18\u89e3<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u7b2c\u4e00\u53cd\u5e94\u5e94\u5f53\u662f\u3010\u5206\u6cbb\u6cd5\u3011\u548c\u3010\u4f18\u5148\u961f\u5217\u3011，\u4e24\u79cd\u65b9\u6cd5\u7684\u65f6\u95f4\u590d\u6742\u5ea6\u90fd\u4e3aO(N * log K)（N\u4e3a\u6240\u6709\u548c\u8282\u70b9\u603b\u6570，K\u4e3a\u94fe\u8868\u6570\u91cf）\u7a7a\u95f4\u590d\u6742\u5ea6\u4e0a\u5206\u6cbb\u4e3aO(log K),\u4f18\u5148\u961f\u5217\u4e3aO(K)，\u4f46\u7531\u4e8eC\u8bed\u8a00\u5b9e\u73b0\u5c0f\u9876\u5806\u9700\u8981\u53e6\u5f00\u7bc7\u5e45，\u4e00\u822c\u662f\u4f7f\u7528C++\u81ea\u5e26\u7684STL\u5e93\u89e3\u51b3，\u800c\u4e14\u672c\u6587\u91cd\u70b9\u8ba8\u8bba\u94fe\u8868\u65b9\u6cd5，\u4ee5\u53ca\u4ee3\u7801\u7b80\u6d01\u6027\u7b49\u8003\u8651\u4e0b，\u9996\u9009\u3010\u5206\u6cbb\u6cd5\u3011\u3002\u6b64\u5904\u5c55\u793a\u7a7a\u95f4\u590d\u6742\u5ea6 O(1) \u7684\u8fed\u4ee3\u5f0f\u5206\u6cbb\u3002<\/p>\n

typedef struct ListNode ListNode;
\nstruct ListNode* mergeTwoLists(struct ListNode* list1, struct ListNode* list2) {
\n if(!list1) return list2;
\n if(!list2) return list1;<\/p>\n

ListNode dummy;
\n dummy.next = NULL;
\n ListNode* prev = &dummy;
\n while(list1 && list2){
\n if(list1->val < list2->val){
\n prev->next = list1;
\n list1 = list1->next;
\n }else{
\n prev->next = list2;
\n list2 = list2->next;
\n }
\n prev = prev->next;
\n }
\n prev->next = list1? list1 : list2;
\n return dummy.next;
\n}
\nstruct ListNode* mergeKLists(struct ListNode** lists, int listsSize) {
\n if(!listsSize) return NULL;
\n while(listsSize > 1){
\n int mergeSize = 0;
\n for(int i = 0; i < listsSize – (listsSize % 2); i += 2){
\n lists[mergeSize++] = mergeTwoLists(lists[i],lists[i + 1]);
\n }
\n if(listsSize % 2 != 0){
\n lists[mergeSize++] = lists[listsSize – 1];
\n }
\n listsSize = mergeSize;
\n }
\n return lists[0];
\n} <\/p>\n

\n

3.2 \u601d\u8def\u63a8\u5bfc<\/p>\n

3.2.1 \u201d\u66b4\u529b\u4e32\u73e0\u6cd5\u201c<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u7ecf\u8fc7\u5148\u524d\u601d\u60f3\u7684\u5347\u534e，\u62ff\u5230\u8fd9\u9053\u9898\u65f6，\u4f60\u81f3\u5c11\u4e0d\u4f1a\u5b8c\u5168\u6ca1\u601d\u8def，\u81f3\u5c11\u4f60\u80fd\u60f3\u5230\u76f4\u63a5\u6216\u95f4\u63a5\u5730\u5229\u7528\u521a\u624d\u5408\u5e76\u4e24\u4e2a\u6709\u5e8f\u94fe\u8868\u7684\u903b\u8f91\u3002\u4f46\u662f，\u6700\u5c0f\u503c\u7684\u6bd4\u8f83\u4e0d\u518d\u662f\u7b80\u5355\u7684\u4e8c\u5206\u903b\u8f91，\u663e\u7136\u6211\u4eec\u9700\u8981\u4e00\u4e2a\u65b0\u53d8\u91cf\u6765\u4fdd\u5b58\u5f53\u524d\u6bd4\u8f83\u4e2d\u7684\u6700\u5c0f\u503c\u3002\u4e0d\u59a8\u53eb\u505acurrMin\u3002<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u53e6\u4e00\u4e2a\u95ee\u9898\u662f，\u94fe\u8868\u7684\u5224\u7a7a\u4e5f\u4e0d\u518d\u8f7b\u677e，\u6211\u4eec\u5f88\u5bb9\u6613\u60f3\u5230\u5faa\u73af\u5185\u52a0\u5165\u5224\u7a7a\u903b\u8f91\u76f4\u63a5\u8df3\u8fc7\u7a7a\u94fe\u8868\u3002\u5faa\u73af\u7684\u7ec8\u6b62\u903b\u8f91\u5462？\u6211\u4eec\u6ca1\u6cd5\u50cf\u4e4b\u524d\u4e00\u6837\u5c06\u6240\u6709\u94fe\u8868\u7684\u5934\u6307\u9488\u5217\u4e3e\u51fa\u6765\u3002\u8fd9\u6837\u7c7b\u4f3c\u7684\u60c5\u5883\u8ba9\u6211\u4eec\u5f88\u5bb9\u6613\u5730\u60f3\u5230\u9012\u5f52，\u4f46\u6211\u4eec\u53ef\u4ee5\u6682\u65f6\u4fdd\u7559\u8fd9\u4e2a\u60f3\u6cd5，\u5c31\u6211\u4eec\u5148\u524d\u7684\u7ecf\u9a8c，\u9012\u5f52\u5fc5\u7136\u5e26\u6765\u7a7a\u95f4\u4e0a\u7684\u5f00\u9500\u3002\u5148\u770b\u770b\u6709\u6ca1\u6709\u66f4\u597d\u7684\u66ff\u4ee3\u65b9\u6848\u3002<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u6ce8\u610f\u5230，\u8fd9\u6b21\u9898\u76ee\u7ed9\u51fa\u4e86\u4e00\u4e2a\u65b0\u7684\u53d8\u91cf\u2014\u2014listSize\u3002\u4e5f\u5c31\u662f\u8bf4\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u5224\u7a7a\u7684\u540c\u65f6\u51cf\u5c11listSize，\u5f53\u6570\u91cf\u51cf\u5c11\u81f30\u65f6\u7ed3\u675f\u5faa\u73af\u3002\u4f46\u6211\u4eec\u4e0d\u5e0c\u671b\u53c8\u6bcf\u6b21\u8df3\u8fc7\u65f6\u90fd\u51cf\u5c11listSize\u3002\u5982\u679c\u4f60\u60f3\u901a\u8fc7\u589e\u6dfb\u65b0\u7684\u6570\u7ec4\u6765\u5b58\u975e\u7a7a\u7684\u94fe\u8868，\u6709\u4e86\u521a\u624d\u5408\u5e76\u4e24\u4e2a\u94fe\u8868\u65f6\u7684\u601d\u8003\u7ecf\u9a8c，\u5e94\u8be5\u610f\u8bc6\u5230\u6211\u4eec\u501f\u52a9\u4e86listSize\u8fd9\u4e2a\u601d\u8003\u951a\u70b9，\u8fd9\u6837\u7684\u5ef6\u7eed\u601d\u8def\u5f88\u53ef\u80fd\u542b\u6709\u5197\u4f59\u903b\u8f91，\u4e5f\u5c31\u662f\u5185\u8574\u66f4\u672c\u8d28\u7684\u65b9\u6cd5\u3002<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u6211\u4eec\u4e0d\u59a8\u601d\u8003\u8fd9\u6837\u505a\u7684\u5f0a\u7aef\u662f\u4ec0\u4e48，\u4e0d\u4ec5\u7a7a\u95f4\u590d\u6742\u5ea6\u63d0\u5347\u81f3O(k)，\u800c\u4e14\u4ee3\u7801\u4e5f\u4e0d\u591f\u7b80\u6d01\u4f18\u96c5\u3002\u7684\u786e，\u6211\u4eec\u4e0d\u5fc5\u9884\u8bbe\u6bcf\u4e2a\u7b97\u6cd5\u90fd\u662f\u7b80\u6d01\u4f18\u96c5\u7684，\u5728\u8003\u8bd5\u3001\u7ade\u8d5b\u3001\u9762\u8bd5\u65f6，\u6211\u4eec\u4e5f\u6ca1\u6709\u529f\u592b\u53bb\u505a\u5176\u4ed6\u7684\u5c1d\u8bd5，\u4f46\u5728\u5b66\u4e60\u9636\u6bb5，\u8fd9\u79cd\u5228\u6839\u95ee\u5e95\u7684\u601d\u8003\u5374\u6709\u52a9\u4e8e\u6211\u4eec\u5f62\u6210\u624e\u5b9e\u7684\u77e5\u8bc6\u7f51\u7edc，\u5bf9\u601d\u7ef4\u7684\u63d0\u5347\u540c\u6837\u5927\u6709\u88e8\u76ca，\u80fd\u4e3a\u6211\u4eec\u4ee5\u540e\u5feb\u901f\u4f5c\u7b54\u592f\u5b9e\u57fa\u7840\u3002<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u6211\u4eec\u6ca1\u5fc5\u8981\u629b\u5f03\u73b0\u6210\u7684\u6570\u7ec4\u4e0d\u7528，\u4e0d\u5982\u5bf9\u9000\u51fa\u903b\u8f91\u6682\u65f6\u7559\u7a7a，\u6bd5\u7adf\u6211\u4eec\u5728\u672a\u904d\u5386\u4e4b\u524d\u662f\u4e0d\u77e5\u9053n\u7684\u4e5f\u5c31\u662f\u603b\u8282\u70b9\u4e2a\u6570\u7684\u3002\u5e72\u8106\u5148\u63d0\u70bc\u51fa\u6838\u5fc3\u6b65\u9aa4，\u7a0d\u540e\u518d\u6765\u8003\u8651\u3002<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5bf9\u4e8e\u4e32\u73e0\u5b50\u8fd9\u4ef6\u4e8b，\u6211\u4eec\u65e9\u5c31\u4e0d\u964c\u751f\u3002\u7b2c\u4e00\u6b65\u5c31\u662f\u4ecek\u7ec4\u94fe\u8868\u5404\u81ea\u7684\u7b2c\u4e00\u4e2a\u5143\u7d20\u91cc\u4e2d\u627e\u51fa\u6700\u5c0f\u7684，\u7b2c\u4e8c\u6b65\u6307\u5411\u5b83，\u5bf9\u5e94list[i]\u524d\u8fdb\u3002\u6700\u66b4\u529b\u7684\u529e\u6cd5\u5c31\u662f\u76f4\u63a5\u8fed\u4ee3\u3002\u65f6\u95f4\u590d\u6742\u5ea6\u4e5f\u5c31\u76f4\u63a5\u5bfc\u5411O(k*n)\u3002<\/p>\n

typedef struct ListNode ListNode;
\nstruct ListNode* mergeKLists(struct ListNode** lists, int listsSize) {
\n ListNode dummy;
\n dummy.next = NULL;
\n ListNode* prev = &dummy;
\n while(1){
\n int curMin = ?;\/\/\u5f85\u5b8c\u6210
\n for(int i = 0; i < listsSize; ++i){
\n if(!lists[i]) continue;
\n if(lists[i]->val < curMin){
\n curMin = lists[i]->val;
\n }
\n }
\n prev->next = lists[?];\/\/\u5f85\u5b8c\u6210
\n prev = prev->next;
\n if(?) break;\/\/\u5f85\u5b8c\u6210
\n }
\n return dummy.next;
\n} <\/p>\n

\u5199\u5230\u8fd9\u91cc，\u6211\u4eec\u4e00\u5171\u9047\u5230\u4e86\u4e09\u4e2a\u95ee\u9898<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a01.\u5faa\u73af\u9000\u51fa\u6761\u4ef6\u672a\u5b9a<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a02.\u6700\u5c0f\u503c\u5982\u4f55\u521d\u59cb\u5316？<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a03.\u6700\u5c0f\u503c\u5bf9\u5e94\u7684lists\u4e0b\u6807\u672a\u8bb0\u5f55<\/p>\n

\u6682\u65f6\u4e0d\u7ba11，\u4e0b\u8868\u6211\u4eec\u5f15\u5165minIdx\u89e3\u51b3\u3002<\/p>\n

\u540c\u65f6\u6ce8\u610f\u5230：<\/p>\n

\"\"<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u6211\u4eec\u53ef\u4ee5\u628acurMin\u521d\u59cb\u5316\u4e3a100000，\u5f53\u7136，\u8fd9\u6837\u53ea\u662f\u4e3a\u4e86\u505a\u9898，\u4f60\u4e5f\u53ef\u4ee5\u50cf\u8fd9\u6837\u9ebb\u70e6\u7684\u53bb\u968f\u4fbf\u627e\u4e2a\u975e\u7a7a\u503c\u6765\u521d\u59cb\u5316\u3002<\/p>\n

for(int i = 0; i < listsSize; ++i){
\n if(!lists[i]) continue;
\n curMin = lists[i]->val;
\n minIndex = i;
\n break;
\n } <\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u8fd9\u663e\u7136\u6ca1\u6709\u5fc5\u8981\u3002\u5728\u521d\u59cb\u5316minIdx\u65f6\u6211\u4eec\u60f3\u5230，\u6211\u4eec\u6bcf\u6b21\u64cd\u4f5c\u90fd\u5fc5\u7136\u8981\u627e\u5230\u4e00\u4e2aminIdx\u7684\u503c，\u90a3\u4e48\u521d\u59cb\u5316minIdx\u4f3c\u4e4e\u6ca1\u6709\u610f\u4e49，\u4f46\u662f\u8fd9\u6837\u610f\u5473\u7740，\u5982\u679c\u6211\u4eec\u5c06minIdx\u521d\u59cb\u5316\u4e3a\u8d1f\u6570，\u90a3\u4e48\u6211\u4eec\u4e0d\u4e45\u53ef\u4ee5\u901a\u8fc7\u5224\u65ad\u5b83\u7684\u6b63\u8d1f\u6765\u5224\u65ad\u8fd8\u6709\u6ca1\u6709\u975e\u7a7a\u94fe\u8868\u4e86？\u8fd9\u6837，\u9000\u51fa\u903b\u8f91\u4e5f\u5c31\u88ab\u6211\u4eec\u987a\u5e26\u89e3\u51b3\u4e86\u3002<\/p>\n

typedef struct ListNode ListNode;
\nstruct ListNode* mergeKLists(struct ListNode** lists, int listsSize) {
\n if(listsSize == 1) return lists[0];
\n ListNode dummy;
\n dummy.next = NULL;
\n ListNode* prev = &dummy;
\n while(listsSize > 0){
\n int curMin = 100000;
\n int minIdx = -1;
\n for(int i = 0; i < listsSize; ++i){
\n if(!lists[i]) continue;
\n if(lists[i]->val < curMin){
\n curMin = lists[i]->val;
\n minIdx = i;
\n }
\n }
\n if(minIdx == -1) break;
\n prev->next = lists[minIdx];
\n lists[minIdx] = lists[minIdx]->next;
\n prev = prev->next;
\n }
\n return dummy.next;
\n} <\/p>\n

\u65f6\u95f4\u590d\u6742\u5ea6O(n*k)，\u7a7a\u95f4\u590d\u6742\u5ea6O(1)<\/p>\n

\"\"<\/p>\n

\n

3.2.2 \u66b4\u529b\u8fed\u4ee3\u6cd5<\/p>\n

\u4e0d\u51fa\u6240\u6599，\u6211\u4eec\u7684\u601d\u8003\u951a\u5b9a\u5728\u4e86\u201d\u7a7f\u73e0\u5b50\u201c\u8fd9\u4e00\u4e2a\u52a8\u4f5c\u4e0a，\u6216\u8bb8\u4f60\u60f3\u8bf4，\u4e3a\u4ec0\u4e48\u7528\u8fd9\u4e48\u8822\u7684\u529e\u6cd5，\u660e\u660e\u521a\u624d\u6211\u4eec\u5c31\u5df2\u7ecf\u5b9e\u73b0\u4e86\u4e24\u4e2a\u6709\u5e8f\u94fe\u8868\u7684\u5408\u5e76\u64cd\u4f5c，\u6211\u4eec\u53ef\u4ee5\u76f4\u63a5\u5229\u7528\u5b83\u3002\u7684\u786e，\u4f46\u8fd9\u662f\u7531\u4e8e\u672c\u6587\u7684\u523b\u610f\u5b89\u6392，\u5982\u679c\u4f60\u5934\u4e00\u6b21\u9047\u5230\u5408\u5e76\u6709\u5e8f\u94fe\u8868\u7684\u9898\u5c31\u662fk\u7ec4\u5462？\u8fd9\u4e0d\u662f\u94bb\u725b\u89d2\u5c16\u3001\u601d\u7ef4\u6d01\u7656，\u800c\u662f\u7684\u786e\u6709\u4ef7\u503c\u7684\u601d\u8003\u3002<\/p>\n

typedef struct ListNode ListNode;
\nstruct ListNode* mergeKLists(struct ListNode** lists, int listsSize) {
\n if (listsSize <= 0) return NULL;
\n ListNode* head = lists[0];
\n for (int i = 1; i < listsSize; ++i) {
\n head = mergeTwoLists(head, lists[i]);
\n }
\n return head;
\n} <\/p>\n

\u65f6\u95f4\u590d\u6742\u5ea6O(k*n),\u7a7a\u95f4\u590d\u6742\u5ea6O(1)<\/p>\n

\u7531\u6b64\u53ef\u89c1，\u6b64\u9898\u82e5\u53ea\u662f\u60f3\u8981\u62ff\u5230AC，\u662f\u975e\u5e38\u7b80\u5355\u7684\u4e00\u4ef6\u4e8b，\u5b9e\u5728\u6709\u635f\u56f0\u96be\u9898\u7684\u8138\u9762（\u7b11）\u3002<\/p>\n

\"\"<\/p>\n

\n

3.2.3 \u4f18\u5148\u961f\u5217\u6cd5（\u6700\u5c0f\u5806\u5b9e\u73b0）<\/p>\n

\u90a3\u4e48\u4e3a\u4ec0\u4e48\u6211\u4eec\u5199\u7684\u201c\u66b4\u529b\u4e32\u73e0\u6cd5\u201d，\u548c\u516c\u8ba4\u7684\u66b4\u529b\u8fed\u4ee3\u6cd5\u540c\u4e3a\u65f6\u95f4\u590d\u6742\u5ea6O(k*n),\u7ecf\u8fc7\u591a\u6b21\u6d4b\u9a8c，\u5374\u662f\u66b4\u529b\u8fed\u4ee3\u6cd5\u7a33\u5b9a\u5f97\u5feb\u5462?\u4e0d\u59a8\u4ee5k = 10^4，\u6bcf\u4e2a\u94fe\u8868 500 \u4e2a\u8282\u70b9\u4e3a\u4f8b，\u8ba1\u7b97\u4e00\u4e0b\u3002<\/p>\n

\"\"<\/p>\n

<\/p>\n

<\/p>\n

\u800c\u4e14，\u8d8a\u662f\u94fe\u8868\u6570\u76f8\u5bf9\u66f4\u5927，\u94fe\u8868\u8282\u70b9\u6570\u76f8\u5bf9\u66f4\u5c0f\u7684\u60c5\u51b5，\u66b4\u529b\u8fed\u4ee3\u7684\u91cd\u590d\u904d\u5386（\u6bcf\u6b21\u5408\u5e76\u4e24\u4e2a\u94fe\u8868\u4e4b\u540e，\u65b0\u94fe\u8868\u7684\u6bcf\u4e2a\u5df2\u7ecf\u88ab\u904d\u5386\u8fc7\u7684\u8282\u70b9\u5728\u548c\u4e0b\u4e2a\u94fe\u8868\u5408\u5e76\u65f6\u53c8\u88ab\u91cd\u590d\u904d\u5386\u4e00\u6b21）\u7684\u516c\u5dee\u5c31\u8d8a\u5c0f，\u52a3\u52bf\u5c31\u8d8a\u4e0d\u660e\u663e\u3002\u800c\u201d\u66b4\u529b\u4e32\u73e0\u6cd5\u201c\u627e\u5230\u5b9e\u9645\u6700\u5c0f\u503c\u65f6，\u6211\u4eec\u627e\u51fa\u7b2c\u4e00\u6b21\u6700\u5c0f\u503c\u8fc7\u540e，\u5c31\u5f80\u4e86\u5176\u4ed6\u6570\u4e4b\u95f4\u7684\u5927\u5c0f\u5173\u7cfb，\u4e3a\u4e86\u90a3\u66f4\u65b0\u7684\u4e00\u4e2a\u6570，\u53c8\u91cd\u65b0\u904d\u5386\u4e86\u4e00\u6b21\u3002\u90a3\u6211\u4eec\u4f18\u5316\u7684\u65b9\u5411\u5c31\u8f6c\u53d8\u4e3a\u4f18\u5316\u91cd\u590d\u627e\u6700\u5c0f\u503c\u7684\u8fc7\u7a0b\u3002\u8fd9\u91cc\u5c31\u5f15\u51fa\u4e86\u8d2a\u5fc3\u7b97\u6cd5（\u4f18\u5148\u961f\u5217）\u3002\u6211\u4eec\u5148\u770b\u4e0b\u9762\u8fd9\u4e2a\u60c5\u5883：<\/p>\n

\"\"<\/p>\n

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\n

3.2.4 \u5206\u6cbb\u5408\u5e76\u6cd5（\u8fed\u4ee3\u5b9e\u73b0-\u81ea\u5e95\u5411\u4e0a）<\/p>\n

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\"\"<\/p>\n

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<\/p>\n

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typedef struct ListNode ListNode;
\nstruct ListNode* mergeKLists(struct ListNode** lists, int listsSize) {
\n if(listsSize == 0) return NULL;
\n if(listsSize <= 1) return lists[0];
\n int mergeSize = 0;
\n for(int i = 0; i < listsSize; i += 2){
\n if (i + 1 <= listsSize – 1) {
\n lists[mergeSize++] = mergeTwoLists(lists[i], lists[i + 1]);
\n }else{
\n lists[mergeSize++] = lists[i];
\n }
\n }
\n return mergeKLists(lists,mergeSize);
\n} <\/p>\n

\"\"<\/p>\n

\u65f6\u95f4\u590d\u6742\u5ea6O(n*log k ),\u7a7a\u95f4\u590d\u6742\u5ea6O(log k)，\u4f46\u8fd9\u5e76\u975e\u9012\u5f52，\u4e25\u683c\u6765\u8bf4\u4ecd\u7136\u662f\u3010\u81ea\u5e95\u5411\u4e0a\u7684\u8fed\u4ee3\u5f0f\u5206\u6cbb\u3011 ，\u53eb\u8fed\u4ee3\u5f0f\u662f\u56e0\u4e3a\u8fd9\u4e2a\u601d\u8def\u7684\u7a7a\u95f4\u590d\u6742\u5ea6\u8ddf\u4ee5\u5f80\u6211\u4eec\u501f\u52a9\u6808\u5e27\u7684\u60c5\u51b5\u4e0d\u540c\u3002\u662f\u6211\u4eec\u4e3a\u4e86\u4ee3\u7801\u7b80\u6d01\u51fa\u73b0\u7684，\u6211\u4eec\u5b8c\u5168\u53ef\u4ee5\u4f18\u5316\u5b83\u3002<\/p>\n

typedef struct ListNode ListNode;
\nstruct ListNode* mergeKLists(struct ListNode** lists, int listsSize) {
\n if(listsSize == 0) return NULL;
\n while(listsSize > 1){
\n int mergeSize = 0;
\n for(int i = 0; i < listsSize; i += 2){
\n if (i + 1 <= listsSize – 1) {
\n lists[mergeSize++] = mergeTwoLists(lists[i], lists[i + 1]);
\n }else{
\n lists[mergeSize++] = lists[i];
\n }
\n }
\n listsSize = mergeSize;
\n }
\n return lists[0];
\n} <\/p>\n

\u65f6\u95f4\u590d\u6742\u5ea6O(n*log k),\u7a7a\u95f4\u590d\u6742\u5ea6O(1)\u3002<\/p>\n

\n

3.2.5\u5206\u6cbb\u5408\u5e76\u6cd5（\u9012\u5f52\u5b9e\u73b0-\u81ea\u9876\u5411\u4e0b）<\/p>\n

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\"\"<\/p>\n

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typedef struct ListNode ListNode;
\nListNode* mergeKListsHelper(ListNode** lists,int left,int right){
\n if(left > right) return NULL;
\n if(left == right) return lists[left];
\n int mid = (left+right) \/ 2;
\n ListNode* leftList = mergeKListsHelper(lists, left, mid);
\n ListNode* rightList = mergeKListsHelper(lists, mid + 1, right);
\n return mergeTwoLists(leftList,rightList);
\n}
\nstruct ListNode* mergeKLists(struct ListNode** lists, int listsSize) {
\n if(listsSize == 0) return NULL;
\n return mergeKListsHelper(lists,0,listsSize – 1);
\n} <\/p>\n

\"\"<\/p>\n

\n

\u4e09\u3001\u603b\u7ed3<\/h3>\n

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\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u672c\u6587\u901a\u8fc7 LeetCode 206.\u53cd\u8f6c\u94fe\u8868\u300121.\u5408\u5e76\u4e24\u4e2a\u6709\u5e8f\u94fe\u8868\u300123.\u5408\u5e76K\u4e2a\u5347\u5e8f\u94fe\u8868\u4e09\u9053\u7531\u6d45\u5165\u6df1\u7684\u9898\u76ee，\u62c6\u89e3\u4e86\u94fe\u8868\u9898\u7684\u89e3\u9898\u903b\u8f91\u3001\u4f18\u5316\u8def\u5f84，\u6838\u5fc3\u4e0d\u4ec5\u662f\u638c\u63e1\u5177\u4f53\u9898\u89e3，\u66f4\u5728\u4e8e\u642d\u5efa\u201c\u4ece\u76f4\u89c9\u601d\u8def\u5230\u6700\u4f18\u89e3\u6cd5\u201d\u7684\u8fa9\u8bc1\u601d\u8003\u6846\u67b6，\u5f62\u6210\u53ef\u590d\u7528\u7684\u7b97\u6cd5\u89e3\u9898\u601d\u7ef4，\u4ee5\u4e0b\u662f\u6838\u5fc3\u603b\u7ed3\u3002<\/p>\n

1. \u6838\u5fc3\u9898\u578b\u4e0e\u89e3\u9898\u65b9\u6cd5\u68b3\u7406<\/h3>\n

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1.1 \u53cd\u8f6c\u94fe\u8868（LeetCode 206）<\/h4>\n

\u6838\u5fc3\u8003\u70b9：\u6307\u9488\u65b9\u5411\u8c03\u6574\u3001\u8282\u70b9\u904d\u5386\u4e0e\u4fdd\u62a4，\u6838\u5fc3\u76ee\u6807\u662f\u5b9e\u73b0\u201c\u539f\u5730\u53cd\u8f6c\u201d\u4ee5\u4f18\u5316\u7a7a\u95f4\u5f00\u9500\u3002<\/p>\n