{"id":51317,"date":"2025-08-10T21:04:45","date_gmt":"2025-08-10T13:04:45","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/51317.html"},"modified":"2025-08-10T21:04:45","modified_gmt":"2025-08-10T13:04:45","slug":"%e3%80%90%e7%ae%97%e6%b3%95%e3%80%91%e3%80%90%e4%bc%98%e9%80%89%e7%ae%97%e6%b3%95%e3%80%91%e4%bc%98%e5%85%88%e7%ba%a7%e9%98%9f%e5%88%97","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/51317.html","title":{"rendered":"\u3010\u7b97\u6cd5\u3011\u3010\u4f18\u9009\u7b97\u6cd5\u3011\u4f18\u5148\u7ea7\u961f\u5217"},"content":{"rendered":"<\/p>\n<h4>\u76ee\u5f55<\/h4>\n<ul>\n<li>\u4e00\u30011046.\u6700\u540e\u4e00\u5757\u77f3\u5934\u7684\u91cd\u91cf<\/li>\n<li>\u4e8c\u3001703. \u6570\u636e\u6d41\u4e2d\u7684\u7b2c K \u5927\u5143\u7d20<\/li>\n<li>\u4e09\u3001692. \u524d K \u4e2a\u2fbc\u9891\u5355\u8bcd<\/li>\n<li>\u56db\u3001295. \u6570\u636e\u6d41\u7684\u4e2d\u4f4d\u6570<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250810130441-689898e9cbd14.gif\" alt=\"\n\" \/><\/p>\n<h2>\u4e00\u30011046.\u6700\u540e\u4e00\u5757\u77f3\u5934\u7684\u91cd\u91cf<\/h2>\n<p>\u9898\u76ee\u94fe\u63a5&#xff1a;1046.\u6700\u540e\u4e00\u5757\u77f3\u5934\u7684\u91cd\u91cf \u9898\u76ee\u63cf\u8ff0&#xff1a; <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250810130441-689898e9dda47.png\" alt=\"\n\" \/><\/p>\n<p>\u9898\u76ee\u89e3\u6790&#xff1a;<\/p>\n<ul>\n<li>\u9898\u610f\u5c31\u662f\u8ba9\u6211\u4eec\u62ff\u51fa\u63d0\u4f9b\u7684\u6570\u7ec4\u7684\u6700\u5927\u4e24\u4e2a\u503c&#xff0c;\u5927\u51cf\u5c0f\u4f5c\u5dee&#xff0c;\u5c06\u5dee\u503c\u518d\u653e\u5165\u6570\u7ec4&#xff0c;\u76f4\u5230\u6570\u7ec4\u7a7a\u4e86\u6216\u8005\u53ea\u6709\u4e00\u4e2a\u5143\u7d20\u4e3a\u6b62\u3002<\/li>\n<\/ul>\n<p>\u89e3\u9898\u601d\u8def&#xff1a;<\/p>\n<ul>\n<li>\u9898\u76ee\u8981\u6c42\u6211\u4eec\u5728\u4e00\u4e2a\u4e71\u5e8f\u7684\u6570\u7ec4\u4e2d\u627e\u6700\u5927\u4e24\u4e2a\u503c&#xff0c;\u6211\u4eec\u9996\u5148\u60f3\u5230\u6570\u7ec4\u6392\u5e8f&#xff0c;\u4f46\u662f\u7531\u4e8e\u6211\u4eec\u8fd8\u9700\u8981\u5c06\u5dee\u503c\u653e\u5165\u6570\u7ec4&#xff0c;\u6211\u4eec\u653e\u4e00\u6b21\u5c31\u9700\u8981\u6392\u5e8f\u4e00\u6b21\u3002<\/li>\n<li>\u4f7f\u7528\u4f18\u5148\u7ea7\u961f\u5217&#xff0c;\u5927\u6839\u5806&#xff0c;\u5f00\u9500\u4f1a\u5c0f\u4e00\u4e9b&#xff0c;\u6211\u4eec\u53ea\u9700\u8981\u6bcf\u6b21\u62ff\u5806\u9876\u5143\u7d20\u5373\u53ef\u3002<\/li>\n<\/ul>\n<p>\u89e3\u9898\u4ee3\u7801&#xff1a;<\/p>\n<p><span class=\"token comment\">\/\/\u65f6\u95f4\u590d\u6742\u5ea6 O(n)<\/span><br \/>\n<span class=\"token comment\">\/\/\u7a7a\u95f4\u590d\u6742\u5ea6 O(n)<\/span><br \/>\n<span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Solution<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">int<\/span> <span class=\"token function\">lastStoneWeight<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> stones<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/\u521b\u5efa\u5927\u6839\u5806<\/span><br \/>\n        <span class=\"token class-name\">PriorityQueue<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">Integer<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> queue <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">PriorityQueue<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><span class=\"token punctuation\">(<\/span><br \/>\n            <span class=\"token punctuation\">(<\/span>a<span class=\"token punctuation\">,<\/span>b<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">-&gt;<\/span> b <span class=\"token operator\">&#8211;<\/span> a<br \/>\n        <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token comment\">\/\/\u5165\u5806<\/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\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> stones<span class=\"token punctuation\">.<\/span>length<span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            queue<span class=\"token punctuation\">.<\/span><span class=\"token function\">offer<\/span><span class=\"token punctuation\">(<\/span>stones<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token comment\">\/\/\u6267\u884c\u903b\u8f91<\/span><br \/>\n        <span class=\"token keyword\">while<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>queue<span class=\"token punctuation\">.<\/span><span class=\"token function\">isEmpty<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&amp;&amp;<\/span> queue<span class=\"token punctuation\">.<\/span><span class=\"token function\">size<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">!&#061;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">int<\/span> y <span class=\"token operator\">&#061;<\/span> queue<span class=\"token punctuation\">.<\/span><span class=\"token function\">poll<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">int<\/span> x <span class=\"token operator\">&#061;<\/span> queue<span class=\"token punctuation\">.<\/span><span class=\"token function\">poll<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            queue<span class=\"token punctuation\">.<\/span><span class=\"token function\">offer<\/span><span class=\"token punctuation\">(<\/span>y<span class=\"token operator\">&#8211;<\/span>x<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token comment\">\/\/\u8fd4\u56de\u503c<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> queue<span class=\"token punctuation\">.<\/span><span class=\"token function\">isEmpty<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">?<\/span> <span class=\"token number\">0<\/span> <span class=\"token operator\">:<\/span> queue<span class=\"token punctuation\">.<\/span><span class=\"token function\">poll<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h2>\u4e8c\u3001703. \u6570\u636e\u6d41\u4e2d\u7684\u7b2c K \u5927\u5143\u7d20<\/h2>\n<p>\u9898\u76ee\u94fe\u63a5&#xff1a;703. \u6570\u636e\u6d41\u4e2d\u7684\u7b2c K \u5927\u5143\u7d20<\/p>\n<p>\u9898\u76ee\u63cf\u8ff0&#xff1a; <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250810130442-689898eab16d7.png\" alt=\"\n\" \/><\/p>\n<p>\u9898\u76ee\u89e3\u6790&#xff1a;<\/p>\n<ul>\n<li>\u7ed9\u6211\u4eec\u4e00\u4e2a\u6570\u7ec4\u548c\u4e00\u4e2a\u6570K&#xff0c;\u8ba9\u6211\u4eec\u5728\u4f7f\u7528\u7c7b\u7684add\u65b9\u6cd5\u540e&#xff0c;\u8fd4\u56de\u6570\u7ec4\u4e2d\u7684\u7b2cK\u5927\u7684\u6570\u3002 \u89e3\u9898\u601d\u8def&#xff1a;<\/li>\n<li>\u6211\u4eec\u4f7f\u7528\u4e00\u4e2a\u5927\u5c0f\u4e3aK\u7684\u5c0f\u6839\u5806&#xff0c;\u90a3\u4e48\u6211\u4eec\u5269\u4e0b\u5728\u5806\u4e2d\u7684\u6570&#xff0c;\u5c31\u662f\u6570\u7ec4\u4e2d\u7b2cK\u5927\u5230\u6700\u5927\u7684\u503c\u3002<\/li>\n<li>\u8fd4\u56de\u6570\u7ec4\u4e2d\u7684\u7b2cK\u5927\u7684\u6570&#xff0c;\u5c31\u662f\u5f53\u524d\u7684\u5806\u9876\u3002<\/li>\n<\/ul>\n<p>\u89e3\u9898\u4ee3\u7801&#xff1a;<\/p>\n<p><span class=\"token comment\">\/\/\u65f6\u95f4\u590d\u6742\u5ea6 O(nLogK)<\/span><br \/>\n<span class=\"token comment\">\/\/\u7a7a\u95f4\u590d\u6742\u5ea6 O(K)<\/span><br \/>\n<span class=\"token keyword\">class<\/span> <span class=\"token class-name\">KthLargest<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token class-name\">PriorityQueue<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">Integer<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> heap<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> param_1<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">KthLargest<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> k<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> nums<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        heap <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">PriorityQueue<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">Integer<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        param_1 <span class=\"token operator\">&#061;<\/span> k<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\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> nums<span class=\"token punctuation\">.<\/span>length<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            heap<span class=\"token punctuation\">.<\/span><span class=\"token function\">offer<\/span><span class=\"token punctuation\">(<\/span>nums<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>heap<span class=\"token punctuation\">.<\/span><span class=\"token function\">size<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&gt;<\/span> param_1<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                heap<span class=\"token punctuation\">.<\/span><span class=\"token function\">poll<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">int<\/span> <span class=\"token function\">add<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> val<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        heap<span class=\"token punctuation\">.<\/span><span class=\"token function\">offer<\/span><span class=\"token punctuation\">(<\/span>val<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>heap<span class=\"token punctuation\">.<\/span><span class=\"token function\">size<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&gt;<\/span> param_1<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            heap<span class=\"token punctuation\">.<\/span><span class=\"token function\">poll<\/span><span class=\"token punctuation\">(<\/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> heap<span class=\"token punctuation\">.<\/span><span class=\"token function\">peek<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h2>\u4e09\u3001692. \u524d K \u4e2a\u2fbc\u9891\u5355\u8bcd<\/h2>\n<p>\u9898\u76ee\u94fe\u63a5&#xff1a;692. \u524d K \u4e2a\u2fbc\u9891\u5355\u8bcd<\/p>\n<p>\u9898\u76ee\u63cf\u8ff0&#xff1a; <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250810130443-689898eb85f26.png\" alt=\"\n\" \/><\/p>\n<p>\u9898\u76ee\u89e3\u6790&#xff1a;<\/p>\n<ul>\n<li>\u7ed9\u6211\u4eec\u4e00\u4e2awords\u7684\u5b57\u7b26\u4e32\u6570\u7ec4&#xff0c;\u8ba9\u6211\u4eec\u8fd4\u56de\u6570\u7ec4\u4e2d\u51fa\u73b0\u7684\u9891\u7387\u6b21\u6570\u6700\u591a\u5230\u7b2cK\u591a\u7684\u5b57\u7b26\u4e32\u3002<\/li>\n<li>\u5f53\u51fa\u73b0\u9891\u6b21\u76f8\u540c\u7684\u65f6\u5019&#xff0c;\u5c31\u76f4\u63a5\u6309\u7167\u5b57\u5178\u987a\u5e8f&#xff0c;\u5b57\u6bcd\u524d\u5230\u540e\u6bd4\u8f83\u5927\u5c0f&#xff0c;\u5927\u5728\u524d\u3002<\/li>\n<\/ul>\n<p>\u89e3\u9898\u601d\u8def&#xff1a;<\/p>\n<ul>\n<li>\u6211\u4eec\u4f7f\u7528\u4e00\u4e2ahash\u8868&#xff0c;\u8bb0\u5f55\u4e0b\u5b57\u7b26\u4e32\u4e0e\u5176\u51fa\u73b0\u7684\u6b21\u6570\u3002<\/li>\n<li>\u5728\u4f7f\u7528\u4e00\u4e2a\u5927\u5c0f\u4e3aK\u7684\u5806&#xff0c;\u5f53\u6211\u4eec\u7684\u9891\u6b21\u5c31\u662fhash\u8868\u4e2d\u7684value\u76f8\u540c\u7684\u65f6\u5019&#xff0c;\u6211\u4eec\u4f7f\u7528compare\u6bd4\u8f83\u5927\u5c0f&#xff0c;\u521b\u5efa\u7684\u662f\u5927\u6839\u5806&#xff0c;\u5176\u4f59\u6bd4\u8f83\u9891\u6b21\u662f\u5c0f\u6839\u5806\u3002\u603b\u4f53\u4e0a\u770b\u8fd8\u662f\u4e00\u4e2a\u5c0f\u6839\u5806\u3002<\/li>\n<li>\u6700\u540e\u4e00\u6b21\u53d6\u51fa\u5806\u4e2d\u7684\u5b57\u7b26\u4e32\u5373\u53ef&#xff0c;\u4f46\u662f\u7531\u4e8e\u8fd4\u56de\u503c\u53c8\u662f\u4ece\u5c0f\u5230\u5927&#xff0c;\u6700\u540e\u5c06\u7ed3\u679c\u6570\u7ec4\u9006\u5e8f\u5373\u53ef\u3002 \u89e3\u9898\u4ee3\u7801&#xff1a;<\/li>\n<\/ul>\n<p><span class=\"token comment\">\/\/\u65f6\u95f4\u590d\u6742\u5ea6&#xff1a;O(NLogK)<\/span><br \/>\n<span class=\"token comment\">\/\/\u7a7a\u95f4\u590d\u6742U\u5ea6&#xff1a;O(N)<\/span><br \/>\n<span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Solution<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">List<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">String<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> <span class=\"token function\">topKFrequent<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> words<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> k<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\">Map<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">String<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">Integer<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> hash <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">HashMap<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token class-name\">PriorityQueue<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">Pair<\/span><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">String<\/span><span class=\"token punctuation\">,<\/span><span class=\"token class-name\">Integer<\/span><span class=\"token punctuation\">&gt;<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> heap <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">PriorityQueue<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><span class=\"token punctuation\">(<\/span><br \/>\n            <span class=\"token punctuation\">(<\/span>a<span class=\"token punctuation\">,<\/span>b<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">-&gt;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token comment\">\/\/\u9891\u6b21\u76f8\u540c\u5927\u6839\u5806<\/span><br \/>\n            <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>a<span class=\"token punctuation\">.<\/span><span class=\"token function\">getValue<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">equals<\/span><span class=\"token punctuation\">(<\/span>b<span class=\"token punctuation\">.<\/span><span class=\"token function\">getValue<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token keyword\">return<\/span> b<span class=\"token punctuation\">.<\/span><span class=\"token function\">getKey<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">compareTo<\/span><span class=\"token punctuation\">(<\/span>a<span class=\"token punctuation\">.<\/span><span class=\"token function\">getKey<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n            <span class=\"token comment\">\/\/\u5c0f\u6839\u5806<\/span><br \/>\n            <span class=\"token keyword\">return<\/span> a<span class=\"token punctuation\">.<\/span><span class=\"token function\">getValue<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#8211;<\/span> b<span class=\"token punctuation\">.<\/span><span class=\"token function\">getValue<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token comment\">\/\/hash\u521d\u59cb\u5316<\/span><br \/>\n        <span class=\"token keyword\">for<\/span><span class=\"token punctuation\">(<\/span> <span class=\"token class-name\">String<\/span> s <span class=\"token operator\">:<\/span> words<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            hash<span class=\"token punctuation\">.<\/span><span class=\"token function\">put<\/span><span class=\"token punctuation\">(<\/span>s<span class=\"token punctuation\">,<\/span> hash<span class=\"token punctuation\">.<\/span><span class=\"token function\">getOrDefault<\/span><span class=\"token punctuation\">(<\/span>s <span class=\"token punctuation\">,<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token comment\">\/\/\u5165\u5806<\/span><br \/>\n        <span class=\"token keyword\">for<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Map<span class=\"token punctuation\">.<\/span>Entry<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">String<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">Integer<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> e <span class=\"token operator\">:<\/span> hash<span class=\"token punctuation\">.<\/span><span class=\"token function\">entrySet<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            heap<span class=\"token punctuation\">.<\/span><span class=\"token function\">offer<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">new<\/span> <span class=\"token class-name\">Pair<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><span class=\"token punctuation\">(<\/span>e<span class=\"token punctuation\">.<\/span><span class=\"token function\">getKey<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span>e<span class=\"token punctuation\">.<\/span><span class=\"token function\">getValue<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>heap<span class=\"token punctuation\">.<\/span><span class=\"token function\">size<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&gt;<\/span> k<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                heap<span class=\"token punctuation\">.<\/span><span class=\"token function\">poll<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/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 comment\">\/\/\u7ed3\u679c\u5904\u7406<\/span><br \/>\n        <span class=\"token class-name\">List<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">String<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> ret <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">ArrayList<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">String<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">while<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>heap<span class=\"token punctuation\">.<\/span><span class=\"token function\">isEmpty<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            ret<span class=\"token punctuation\">.<\/span><span class=\"token function\">add<\/span><span class=\"token punctuation\">(<\/span>heap<span class=\"token punctuation\">.<\/span><span class=\"token function\">poll<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">getKey<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token comment\">\/\/\u9006\u7f6e<\/span><br \/>\n        <span class=\"token class-name\">Collections<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">reverse<\/span><span class=\"token punctuation\">(<\/span>ret<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> ret<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h2>\u56db\u3001295. \u6570\u636e\u6d41\u7684\u4e2d\u4f4d\u6570<\/h2>\n<p>\u9898\u76ee\u94fe\u63a5&#xff1a;295. \u6570\u636e\u6d41\u7684\u4e2d\u4f4d\u6570<\/p>\n<p>\u9898\u76ee\u63cf\u8ff0&#xff1a;<\/p>\n<ul>\n<li>\u5c31\u662f\u8ba9\u6211\u4eec\u5b9e\u73b0\u4e00\u4e2a\u7c7b&#xff0c;\u6709\u521d\u59cb\u5316&#xff0c;\u6dfb\u52a0\u5143\u7d20&#xff08;\u6bcf\u6b21\u6dfb\u52a0\u4e00\u4e2a&#xff09;&#xff0c;\u67e5\u770b\u5143\u7d20\u4e2d\u4f4d\u6570<\/li>\n<\/ul>\n<p>\u9898\u76ee\u89e3\u6790&#xff1a;<\/p>\n<ul>\n<li>\u6211\u4eec\u53ea\u9700\u8981\u6bcf\u6b21\u62ff\u53d6\u7c7b\u4e2d\u7684\u5143\u7d20\u7684\u65f6\u5019&#xff0c;\u80fd\u591f\u76f4\u63a5\u62ff\u5230\u4e2d\u4f4d\u6570\u5373\u53ef\u3002<\/li>\n<li>\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4e24\u4e2a\u5806&#xff0c;\u5c0f\u6839\u5806\u8bb0\u5f55\u6570\u7684\u4e2d\u4f4d\u6570\u4e4b\u540e\u7684\u90e8\u5206&#xff0c;\u5927\u6839\u5806\u8bb0\u5f55\u4e2d\u4f4d\u6570\u7684\u524d\u534a\u90e8\u5206\u3002<\/li>\n<li>\u8fd9\u6837\u5f53\u5143\u7d20\u4e2a\u6570\u662f\u5076\u6570\u4e2a\u7684\u65f6\u5019&#xff0c;\u6211\u4eec\u76f4\u63a5\u62ff\u5230\u4e24\u4e2a\u5806\u7684\u5806\u9876\u5143\u7d20\u5373\u53ef\u3002\u4e3a\u5947\u6570\u4e2a\u5143\u7d20\u7684\u65f6\u5019&#xff0c;\u76f4\u63a5\u53d6\u51fa\u5806\u5143\u7d20\u591a\u7684\u90a3\u4e2a\u7684\u5806\u9876\u5143\u7d20\u5373\u53ef\u3002<\/li>\n<\/ul>\n<p>\u89e3\u9898\u601d\u8def&#xff1a;<\/p>\n<ul>\n<li>\u6211\u4eec\u4f7f\u7528\u4e24\u4e2a\u5806&#xff0c;\u4e00\u4e2a\u5927\u6839\u5806&#xff0c;\u4e00\u4e2a\u5c0f\u6839\u5806&#xff0c;\u5728\u8bb0\u5f55\u4e0b\u5f53\u524d\u7684\u5143\u7d20\u4e2a\u6570\u3002<\/li>\n<li>\u5f53\u63d2\u5165\u5143\u7d20\u540e&#xff0c;\u5143\u7d20\u4e2a\u6570\u4e3a\u5076\u6570&#xff1a;<\/li>\n<li>\n<ul>\n<li>\u5f53\u63d2\u5165\u5143\u7d20\u6bd4\u5927\u6839\u5806\u5806\u9876\u5143\u7d20\u5927&#xff1a;<\/li>\n<\/ul>\n<\/li>\n<li>\n<ul>\n<li>\n<ul>\n<li>\u5927\u6839\u5806\u4e2d\u5143\u7d20\u4e2a\u6570\u6bd4\u5c0f\u6839\u5806\u591a&#xff1a;\u76f4\u63a5\u5c06\u5f85\u63d2\u5165\u5143\u7d20\u63d2\u5165\u5c0f\u6839\u5806\u5373\u53ef\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<ul>\n<li>\n<ul>\n<li>\u5927\u6839\u5806\u4e2d\u5143\u7d20\u4e2a\u6570\u6bd4\u5c0f\u6839\u5806\u5c11&#xff1a;\u5c06\u5c0f\u6839\u5806\u5806\u9876\u5143\u7d20\u548c\u5f85\u63d2\u5165\u5143\u7d20\u8f83\u5c0f\u503c&#xff0c;\u63d2\u5165\u5927\u6839\u5806\u3002\u53e6\u4e00\u4e2a\u7ed9\u5c0f\u6839\u5806\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<ul>\n<li>\u5f53\u63d2\u5165\u5143\u7d20\u6bd4\u5927\u6839\u5806\u5806\u9876\u5143\u7d20\u5c0f&#xff1a;<\/li>\n<\/ul>\n<\/li>\n<li>\n<ul>\n<li>\n<ul>\n<li>\u5927\u6839\u5806\u4e2d\u5143\u7d20\u4e2a\u6570\u6bd4\u5c0f\u6839\u5806\u591a&#xff1a;\u5c06\u5927\u6839\u5806\u5806\u9876\u5143\u7d20\u63d2\u5165\u5c0f\u6839\u5806\u3002\u5f85\u63d2\u5165\u5143\u7d20\u7ed9\u5927\u6839\u5806\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<ul>\n<li>\n<ul>\n<li>\u5927\u6839\u5806\u4e2d\u5143\u7d20\u4e2a\u6570\u6bd4\u5c0f\u6839\u5806\u5c11&#xff1a;\u76f4\u63a5\u5c06\u5f85\u63d2\u5165\u5143\u7d20\u63d2\u5165\u5927\u6839\u5806\u5373\u53ef\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li>\u5f53\u63d2\u5165\u5143\u7d20\u540e&#xff0c;\u5143\u7d20\u4e2a\u6570\u4e3a\u5947\u6570&#xff1a;<\/li>\n<li>\n<ul>\n<li>\u5f53\u63d2\u5165\u5143\u7d20\u6bd4\u5927\u6839\u5806\u5806\u9876\u5143\u7d20\u5927&#xff1a;\u63d2\u5165\u5c0f\u6839\u5806\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<ul>\n<li>\u5f53\u63d2\u5165\u5143\u7d20\u6bd4\u5927\u6839\u5806\u5806\u9876\u5143\u7d20\u5c0f&#xff1a;\u63d2\u5165\u5927\u6839\u5806\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>\u89e3\u9898\u4ee3\u7801&#xff1a;<\/p>\n<p><span class=\"token comment\">\/\/\u65f6\u95f4\u590d\u6742\u5ea6&#xff1a;O(LogN)<\/span><br \/>\n<span class=\"token comment\">\/\/\u7a7a\u95f4\u590d\u6742\u5ea6&#xff1a;O(N)<\/span><br \/>\n<span class=\"token keyword\">class<\/span> <span class=\"token class-name\">MedianFinder<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token comment\">\/\/\u5217\u8868\u4e2d\u5143\u7d20\u4e2a\u6570<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> n <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token comment\">\/\/\u5927\u6839\u5806\u8bb0\u5f55\u524d\u534a\u90e8\u5206\u503c<\/span><br \/>\n    <span class=\"token class-name\">PriorityQueue<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">Integer<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> big<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token comment\">\/\/\u5c0f\u6839\u5806\u8bb0\u5f55\u540e\u534a\u90e8\u5206\u503c<\/span><br \/>\n    <span class=\"token class-name\">PriorityQueue<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">Integer<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> little<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">MedianFinder<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        big <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">PriorityQueue<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">(<\/span>a<span class=\"token punctuation\">,<\/span>b<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">-&gt;<\/span><span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">return<\/span> b<span class=\"token operator\">&#8211;<\/span>a<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        little <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">PriorityQueue<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">addNum<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> num<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        n <span class=\"token operator\">&#043;&#061;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>n <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token number\">1<\/span> <span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            big<span class=\"token punctuation\">.<\/span><span class=\"token function\">offer<\/span><span class=\"token punctuation\">(<\/span>num<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">return<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token comment\">\/\/\u5143\u7d20\u4e2a\u6570\u4e3a\u5076\u6570&#xff0c;\u6bd4\u524d\u9762\u7684\u5927<\/span><br \/>\n        <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>n <span class=\"token operator\">%<\/span> <span class=\"token number\">2<\/span> <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token number\">0<\/span> <span class=\"token operator\">&amp;&amp;<\/span> big<span class=\"token punctuation\">.<\/span><span class=\"token function\">peek<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&lt;&#061;<\/span> num<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token comment\">\/\/\u4fdd\u6301\u524d\u540e\u6570\u636e\u5e73\u8861<\/span><br \/>\n            <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>big<span class=\"token punctuation\">.<\/span><span class=\"token function\">size<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&lt;<\/span> little<span class=\"token punctuation\">.<\/span><span class=\"token function\">size<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token comment\">\/\/\u6bd4\u540e\u9762\u5c0f<\/span><br \/>\n                <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>little<span class=\"token punctuation\">.<\/span><span class=\"token function\">isEmpty<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&amp;&amp;<\/span> little<span class=\"token punctuation\">.<\/span><span class=\"token function\">peek<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&gt;&#061;<\/span> num<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                    big<span class=\"token punctuation\">.<\/span><span class=\"token function\">offer<\/span><span class=\"token punctuation\">(<\/span>num<span class=\"token punctuation\">)<\/span><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\">int<\/span> tmp <span class=\"token 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