{"id":34225,"date":"2025-04-29T09:14:04","date_gmt":"2025-04-29T01:14:04","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/34225.html"},"modified":"2025-04-29T09:14:04","modified_gmt":"2025-04-29T01:14:04","slug":"%e3%80%90%e4%bc%98%e9%80%89%e7%ae%97%e6%b3%95-%e4%ba%8c%e5%88%86%e6%9f%a5%e6%89%be%e3%80%91%e4%ba%8c%e5%88%86%e6%9f%a5%e6%89%be%e7%ae%97%e6%b3%95%e8%a7%a3%e6%9e%90%ef%bc%9a%e5%a6%82%e4%bd%95","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/34225.html","title":{"rendered":"\u3010\u4f18\u9009\u7b97\u6cd5 | \u4e8c\u5206\u67e5\u627e\u3011\u4e8c\u5206\u67e5\u627e\u7b97\u6cd5\u89e3\u6790\uff1a\u5982\u4f55\u901a\u8fc7\u4e8c\u6bb5\u6027\u4f18\u5316\u641c\u7d22\u6548\u7387"},"content":{"rendered":"

\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n\n\u7b97\u6cd5\u76f8\u5173\u77e5\u8bc6\u70b9\u53ef\u4ee5\u901a\u8fc7\u70b9\u51fb\u4ee5\u4e0b\u94fe\u63a5\u8fdb\u884c\u5b66\u4e60\u4e00\u8d77\u52a0\u6cb9！<\/tr>\n\n\n
\u53cc\u6307\u9488<\/td>\n\u6ed1\u52a8\u7a97\u53e3<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u5728\u672c\u7bc7\u6587\u7ae0\u4e2d，\u6211\u4eec\u5c06\u6df1\u5165\u89e3\u6790\u4e8c\u5206\u67e5\u627e\u7b97\u6cd5\u7684\u6838\u5fc3\u539f\u7406\u3002\u4ece\u57fa\u672c\u6982\u5ff5\u5230\u5b9e\u9645\u5e94\u7528，\u5e26\u4f60\u4e86\u89e3\u5982\u4f55\u5229\u7528\u4e8c\u5206\u67e5\u627e\u9ad8\u6548\u5b9a\u4f4d\u5143\u7d20，\u63d0\u5347\u641c\u7d22\u6548\u7387\u3002\u65e0\u8bba\u4f60\u662f\u521a\u63a5\u89e6\u7b97\u6cd5\u7684\u65b0\u624b，\u8fd8\u662f\u60f3\u4f18\u5316\u4ee3\u7801\u6027\u80fd\u7684\u8001\u624b，\u4e8c\u5206\u67e5\u627e\u90fd\u662f\u4f60\u4e0d\u53ef\u5ffd\u89c6\u7684\u5f3a\u5927\u5de5\u5177！<\/p>\n

\"\u8bf7\u6dfb\u52a0\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

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

🌈\u4e2a\u4eba\u4e3b\u9875：\u662f\u5e97\u5c0f\u4e8c\u5440 🌈C\/C++\u4e13\u680f：C\u8bed\u8a00\\\\ C++ 🌈\u521d\/\u9ad8\u9636\u6570\u636e\u7ed3\u6784\u4e13\u680f： \u521d\u9636\u6570\u636e\u7ed3\u6784\\\\ \u9ad8\u9636\u6570\u636e\u7ed3\u6784 🌈Linux\u4e13\u680f： Linux 🌈\u7b97\u6cd5\u4e13\u680f：\u7b97\u6cd5 🌈Mysql\u4e13\u680f:Mysql<\/p>\n

🌈\u4f60\u53ef\u77e5:\u65e0\u4eba\u6276\u6211\u9752\u4e91\u5fd7 \u6211\u81ea\u8e0f\u96ea\u81f3\u5c71\u5dc5 \"\u8bf7\u6dfb\u52a0\u56fe\u7247\u63cf\u8ff0\"<\/p>\n<\/p>\n

\u6587\u7ae0\u76ee\u5f55<\/h4>\n
    \n
  • \n
      \n
    • 34. \u5728\u6392\u5e8f\u6570\u7ec4\u4e2d\u67e5\u627e\u5143\u7d20\u7684\u7b2c\u4e00\u4e2a\u548c\u6700\u540e\u4e00\u4e2a\u4f4d\u7f6e(\u91cd\u8981)<\/font><\/li>\n
    • \u4e8c\u6bb5\u6027(\u91cd\u8981\/\u5fc5\u5907\u77e5\u8bc6)<\/font><\/li>\n
    • \n
        \n
      • 1.\u67e5\u627e\u5de6\u7aef\u70b9<\/font><\/li>\n
      • 2.\u5faa\u73af\u5224\u65ad\u6761\u4ef6<\/font><\/li>\n
      • 3. left\u548cright\u79fb\u52a8\u65b9\u5f0f<\/font><\/li>\n
      • 3.\u6c42\u4e2d\u70b9\u64cd\u4f5c<\/font><\/li>\n
      • 4.\u603b\u7ed3\u4e8c\u5206\u6a21\u677f<\/font><\/li>\n<\/ul>\n<\/li>\n
      • 69.x \u7684\u5e73\u65b9\u6839 <\/font><\/li>\n
      • 35.\u641c\u7d22\u63d2\u5165\u4f4d\u7f6e<\/font><\/li>\n
      • 69.\u5c71\u8109\u6570\u7ec4\u7684\u5cf0\u9876\u7d22\u5f15<\/font><\/li>\n
      • 162. \u5bfb\u627e\u5cf0\u503c<\/font><\/li>\n
      • 153. \u5bfb\u627e\u65cb\u8f6c\u6392\u5e8f\u6570\u7ec4\u4e2d\u7684\u6700\u5c0f\u503c<\/font><\/li>\n
      • LCR 173. \u70b9\u540d<\/font><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n

        34. \u5728\u6392\u5e8f\u6570\u7ec4\u4e2d\u67e5\u627e\u5143\u7d20\u7684\u7b2c\u4e00\u4e2a\u548c\u6700\u540e\u4e00\u4e2a\u4f4d\u7f6e(\u91cd\u8981)<\/font><\/h3>\n

        \u3010\u9898\u76ee\u3011：34. \u5728\u6392\u5e8f\u6570\u7ec4\u4e2d\u67e5\u627e\u5143\u7d20\u7684\u7b2c\u4e00\u4e2a\u548c\u6700\u540e\u4e00\u4e2a\u4f4d\u7f6e<\/p>\n

        \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

        \u5982\u679c\u9898\u76ee\u4e3a"\u5728\u6392\u5e8f\u6570\u7ec4\u4e2d\u67e5\u627e\u5143\u7d20"，\u5f88\u81ea\u7136\u53ef\u4ee5\u60f3\u5230\u6734\u7d20\u4e8c\u5206\u67e5\u627e，\u6839\u636e\u4e2d\u95f4\u6570\u503c\u8ba8\u8bba，\u4f46\u662f"\u6734\u7d20\u4e8c\u5206"\u4e0d\u9002\u5408\u66f4\u6709\u5c42\u5ea6\u9898\u76ee，\u6bd4\u5982\u8bf4\u8fd9\u9053\u9898\u76ee\u3002<\/p>\n

        \u9996\u5148\u5982\u679c\u4f7f\u7528\u6734\u7d20\u4e8c\u5206\u5355\u51ed\u4e00\u4e2a\u4e2d\u95f4\u503c，\u5f88\u96be\u5f97\u77e5\u7b2c\u4e00\u4e2a\u548c\u6700\u540e\u4e00\u4e2a\u4f4d\u7f6e\u3002\u5982\u679c\u51fa\u73b0\u5168\u90e8\u662f\u76f8\u540c\u5143\u7d20\u7684\u60c5\u51b5，\u4f1a\u5bfc\u81f4\u65f6\u95f4\u590d\u6742\u5ea6\u964d\u6210\u540c\u66b4\u529b\u89e3\u6cd5\u822c，\u5bf9\u6b64\u6211\u4eec\u5e94\u8be5\u501f\u52a9"\u4e8c\u6bb5\u6027"\u4f18\u5316\u4e8c\u5206\u67e5\u627e\u7b56\u7565<\/p>\n

        \u3010\u7b97\u6cd5\u601d\u8def<\/font>\u3011<\/p>\n

        \u4e8c\u6bb5\u6027(\u91cd\u8981\/\u5fc5\u5907\u77e5\u8bc6)<\/font><\/h3>\n

        \u5728\u4e8c\u5206\u67e5\u627e\u7b97\u6cd5\u4e2d，\u201c\u4e8c\u6bb5\u6027\u201d\u901a\u5e38\u6307\u7684\u662f\u6570\u7ec4\u88ab\u5206\u6210\u4e24\u4e2a\u90e8\u5206\u8fdb\u884c\u67e5\u627e，\u6bcf\u6b21\u90fd\u6839\u636e\u67d0\u79cd\u6761\u4ef6\u8fdb\u884c\u5224\u65ad\u3001\u51b3\u5b9a<\/font>\u5728\u54ea\u4e00\u90e8\u5206\u7ee7\u7eed\u641c\u7d22\u3002\u7b80\u5355\u6765\u8bf4，\u4e8c\u5206\u67e5\u627e\u901a\u8fc7\u5c06\u95ee\u9898\u9010\u6b65\u7f29\u5c0f\u5230\u4e24\u4e2a\u5b50\u95ee\u9898\u4e2d\u7684\u4e00\u4e2a，\u4ece\u800c\u9ad8\u6548\u5730\u627e\u5230\u76ee\u6807\u5143\u7d20\u3002<\/p>\n

        1.\u67e5\u627e\u5de6\u7aef\u70b9<\/font><\/h4>\n

        \u901a\u8fc7\u7ed8\u56fe\u5206\u6790\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u4e0e\u76ee\u6807\u503c（target）\u4e4b\u95f4\u7684\u5173\u7cfb，\u6211\u4eec\u53ef\u4ee5\u5c06\u6570\u7ec4\u5212\u5206\u4e3a\u4e24\u90e8\u5206：\u5de6\u4fa7\u90e8\u5206\u5305\u542b\u6240\u6709\u5c0f\u4e8e\u76ee\u6807\u503c\u7684\u5143\u7d20，\u53f3\u4fa7\u90e8\u5206\u5219\u5305\u542b\u6240\u6709\u5927\u4e8e\u6216\u7b49\u4e8e\u76ee\u6807\u503c\u7684\u5143\u7d20<\/font>\u3002\u8fd9\u4e00\u5212\u5206\u662f\u57fa\u4e8e\u4e8c\u5206\u6027\u8d28\u8fdb\u884c\u7684\u3002<\/p>\n

        \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

        \u3010\u7ec6\u8282\u5904\u7406\u3011<\/p>\n

        \u5173\u4e8e\u8fd9\u90e8\u5206\u7ec6\u8282，\u5c5e\u4e8e\u4e8c\u5206\u67e5\u627e\u5bb9\u6613\u5bfc\u81f4\u6b7b\u5faa\u73af\u7684\u95ee\u9898\u6240\u5728\u3002<\/p>\n

        2.\u5faa\u73af\u5224\u65ad\u6761\u4ef6<\/font><\/h4>\n

        \u8fd9\u91cc\u6709\u4e24\u79cd\u5faa\u73af\u5224\u65ad\u6761\u4ef6，\u5fc5\u987b\u8981\u9009\u62e9\u7b2c\u4e00\u79cd，\u800c\u4e0d\u662f\u7b2c\u4e8c\u79cd\u3002\u5982\u679c\u9009\u62e9\u7b2c\u4e8c\u79cd\u4f1a\u5bfc\u81f4\u6b7b\u5faa\u73af\u3002<\/p>\n

        \u7b2c\u4e00\u79cd：while(left < right)<\/p>\n

        \u7b2c\u4e8c\u79cd：while(left <= right)<\/p>\n

        \u9009\u62e9\u7b2c\u4e00\u79cd\u7406\u7531<\/font><\/p>\n

        \u3010\u7406\u7531\u4e00\u3011：<\/p>\n

        \u8fd9\u91cc\u53ea\u80fd\u9009\u62e9\u7b2c\u4e00\u79cdwhile(left < right)，\u5426\u5219\u5c31\u4f1a\u6b7b\u5faa\u73af\u3002\u6bd4\u5982left = mid \u6216\u8005 right = mid，\u5f53\u4f60\u5224\u65ad\u6761\u4ef6\u4e3aleft <= right，left == right \u4e00\u76f4\u4e3a\u771f，\u5bfc\u81f4\u6b7b\u5faa\u73af<\/p>\n

        \u3010\u7406\u7531\u4e8c\u3011：<\/p>\n

        left ==right\u7684\u65f6\u5019，\u5c31\u662f\u6700\u7ec8\u7ed3\u6784，\u65e0\u9700\u5224\u65ad\u3002\u56fe\u4e2d\u6709\u4e09\u79cd\u60c5\u51b5\u4f50\u8bc1：\u6709\u7ed3\u679c，\u5168\u5927\u4e8et，\u5168\u5c0f\u4e8et<\/p>\n

        \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

        3. left\u548cright\u79fb\u52a8\u65b9\u5f0f<\/font><\/h4>\n

        \u901a\u8fc7\u4e8c\u5206\u6cd5\u5c06\u6570\u7ec4\u5212\u5206\u4e3a\u4e24\u90e8\u5206\u3002\u5728\u6b64\u8fc7\u7a0b\u4e2d，\u9700\u8981\u6839\u636e\u76ee\u6807\u503c\u4e0e\u5f53\u524d\u5212\u5206\u533a\u57df\u7684\u5173\u7cfb\u6765\u5224\u65adleft\u548cright\u7684\u79fb\u52a8\u65b9\u5f0f\u3002<\/p>\n

        \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

        \u901a\u8fc7\u7ed8\u56fe\u5206\u6790，\u5982\u679c\u76ee\u6807\u503c\u4f4d\u4e8e\u5de6\u4fa7\u4e14mid\u843d\u5728\u5de6\u4fa7，\u5219left\u5e94\u8bbe\u7f6e\u4e3amid，\u800c\u4e0d\u662fmid + 1，\u4ee5\u907f\u514d\u9519\u8fc7\u76ee\u6807\u503c；\u5982\u679cmid\u843d\u5728\u53f3\u4fa7，\u5219\u7531\u4e8e\u76ee\u6807\u503c\u4e0d\u5728\u53f3\u4fa7，right\u5e94\u8bbe\u7f6e\u4e3amid – 1<\/p>\n

        \u540c\u7406\u53ef\u5f97，\u5f53\u76ee\u6807\u4f4d\u4e8e\u53f3\u4fa7，\u5982\u679cmid\u843d\u5728\u53f3\u4fa7，\u5219right\u5e94\u8bbe\u7f6e\u4e3amid，\u800c\u4e0d\u662fmid – 1，\u4ee5\u907f\u514d\u9519\u8fc7\u76ee\u6807\u503c；\u5982\u679cmid\u843d\u5728\u5de6\u4fa7，\u5219left\u5e94\u8bbe\u7f6e\u4e3amid + 1，\u56e0\u4e3a\u76ee\u6807\u503c\u4e0d\u5728\u5de6\u4fa7\u3002<\/p>\n

        3.\u6c42\u4e2d\u70b9\u64cd\u4f5c<\/font><\/h4>\n

        \u9996\u5148\u8003\u8651\u5230 right \u53ef\u80fd\u4f1a\u8d85\u8fc7Max\u503c，\u6240\u4ee5\u4f1a\u5148\u91c7\u7528 left + (right – left) \/ 2\u3002\u5728\u4e8c\u5206\u67e5\u627e\u4e2d，\u6c42\u4e2d\u70b9\u64cd\u4f5c\u6709\u4e24\u4e2a\u65b9\u5f0f，\u5728\u4e0d\u540c\u573a\u666f\u9009\u62e9\u9002\u5408\u7684\u65b9\u5f0f，\u5426\u5219\u5bb9\u6613\u5bfc\u81f4\u6b7b\u5faa\u73af<\/p>\n

        \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

        \u3010\u7b2c\u4e00\u79cd\u65b9\u5f0f\u3011: mid = left + (right – left) \/ 2，\u4f1a\u5bfc\u81f4mid\u843d\u5728\u5de6\u4fa7<\/p>\n

        \u3010\u7b2c\u4e8c\u79cd\u65b9\u5f0f\u3011:mid = left + (right – left + 1) \/ 2，\u4f1a\u5bfc\u81f4mid\u843d\u5728\u53f3\u4fa7<\/p>\n

        \u4f8b\u5982，\u6c42\u5de6\u7aef\u70b9\u65f6，\u5982\u679cleft = mid，right = mid – 1，\u6839\u636e\u8fd9\u4e24\u4e2a\u53d8\u91cf\u7684\u79fb\u52a8\u89c4\u5f8b，\u82e5\u4f7f\u7528\u7b2c\u4e00\u79cd\u65b9\u5f0f（left = mid + 1），\u4f1a\u5bfc\u81f4\u6b7b\u5faa\u73af，\u56e0\u6b64\u5e94\u4f7f\u7528\u7b2c\u4e8c\u79cd\u65b9\u5f0f（left = mid）\u3002\u540c\u7406，\u6c42\u53f3\u7aef\u70b9\u65f6，\u82e5left = mid + 1，right = mid，\u5e94\u6839\u636e\u76f8\u5e94\u7684\u89c4\u5219\u8c03\u6574\u8fb9\u754c，\u907f\u514d\u6b7b\u5faa\u73af\u5e76\u786e\u4fdd\u6b63\u786e\u627e\u5230\u53f3\u7aef\u70b9，\u9009\u62e9\u7b2c\u4e00\u79cd\u65b9\u5f0f\u3002<\/p>\n

        \u3010\u4ee3\u7801\u5b9e\u73b0\u3011<\/p>\n

        class<\/span> Solution<\/span> {<\/span>
        \npublic<\/span>:<\/span>
        \n vector<<\/span>int<\/span>><\/span> searchRange<\/span>(<\/span>vector<<\/span>int<\/span>><\/span>&<\/span> nums,<\/span> int<\/span> target)<\/span>
        \n {<\/span>
        \n int<\/span> left =<\/span> 0<\/span>,<\/span> right =<\/span> nums.<\/span>size<\/span>(<\/span>)<\/span> –<\/span> 1<\/span>;<\/span>
        \n int<\/span> begin =<\/span> 0<\/span>;<\/span>
        \n if<\/span>(<\/span>nums.<\/span>size<\/span>(<\/span>)<\/span> ==<\/span> 0<\/span>)<\/span> return<\/span> {<\/span>–<\/span>1<\/span>,<\/span>–<\/span>1<\/span>}<\/span>;<\/span>
        \n \/\/\u6c42\u89e3\u5de6\u7aef\u70b9<\/span>
        \n while<\/span>(<\/span>left <<\/span> right)<\/span>
        \n {<\/span>
        \n int<\/span> mid =<\/span> left +<\/span> (<\/span>right –<\/span> left)<\/span>\/<\/span>2<\/span>;<\/span>
        \n if<\/span>(<\/span>nums[<\/span>mid]<\/span> <<\/span> target)<\/span> left =<\/span> mid +<\/span> 1<\/span>;<\/span>
        \n else<\/span> right =<\/span> mid;<\/span>
        \n }<\/span>
        \n if<\/span>(<\/span>target !=<\/span> nums[<\/span>left]<\/span>)<\/span> return<\/span> {<\/span>–<\/span>1<\/span>,<\/span>–<\/span>1<\/span>}<\/span>;<\/span>
        \n else<\/span> begin =<\/span> left;<\/span><\/p>\n

        left =<\/span> 0<\/span>,<\/span>right =<\/span> nums.<\/span>size<\/span>(<\/span>)<\/span> –<\/span> 1<\/span>;<\/span>
        \n \/\/\u6c42\u89e3\u53f3\u7aef\u70b9<\/span>
        \n while<\/span>(<\/span>left <<\/span> right)<\/span>
        \n {<\/span>
        \n int<\/span> mid =<\/span> left +<\/span> (<\/span>right –<\/span> left +<\/span> 1<\/span>)<\/span>\/<\/span>2<\/span>;<\/span>
        \n if<\/span>(<\/span>nums[<\/span>mid]<\/span> ><\/span> target)<\/span> right =<\/span> mid –<\/span> 1<\/span>;<\/span>
        \n else<\/span> left =<\/span> mid;<\/span>
        \n }<\/span>
        \n return<\/span> {<\/span>begin,<\/span>left}<\/span>;<\/span>
        \n }<\/span>
        \n}<\/span>;<\/span><\/p>\n

        4.\u603b\u7ed3\u4e8c\u5206\u6a21\u677f<\/font><\/h4>\n

        \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

        \u901a\u8fc7\u4e0d\u65ad\u5237\u9898，\u6211\u4eec\u4f1a\u53d1\u73b0\u5f88\u591a\u9898\u76ee\u90fd\u662f\u76f8\u4f3c\u7684\u3002\u5982\u679c\u5fd8\u8bb0\u4e86\u67d0\u4e9b\u5e38\u7528\u6a21\u677f，\u4e5f\u53ef\u4ee5\u901a\u8fc7\u4e0a\u8ff0\u65b9\u5f0f\u91cd\u65b0\u63a8\u5bfc\u3002\u5173\u952e\u5728\u4e8e\u5982\u4f55\u8bc6\u522b\u9898\u76ee\u4e2d\u7684\u4e8c\u5206\u6027\u8d28，\u4ece\u800c\u5c06\u95ee\u9898\u5212\u5206\u4e3a\u4e24\u4e2a\u533a\u95f4\u3002<\/p>\n

        \n

        69.x \u7684\u5e73\u65b9\u6839 <\/font><\/h3>\n

        \u3010\u9898\u76ee\u3011：69. x \u7684\u5e73\u65b9\u6839 <\/p>\n

        \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

        \u3010\u7b97\u6cd5\u601d\u8def<\/font>\u3011<\/p>\n

        1.\u66b4\u529b\u67e5\u627e<\/p>\n

        \u901a\u8fc7\u679a\u4e3e\u4ece 0 \u5230 x \u4e4b\u95f4\u7684\u6bcf\u4e2a\u6574\u6570 i，\u5224\u65ad\u662f\u5426\u6ee1\u8db3\u6761\u4ef6：<\/p>\n

        \u8fd9\u91cc\u4e0d\u9700\u8981\u8003\u8651\u662f\u5426\u679a\u4e3e\u5230 x \/ 2 \u6216 x \/ 2 + 1，\u56e0\u4e3a\u4e00\u65e6\u627e\u5230\u7ed3\u679c\u5c31\u76f4\u63a5\u8fd4\u56de，\u540e\u7eed\u7684\u60c5\u51b5\u4e0d\u518d\u8fdb\u884c\u5224\u65ad\u3002\u8fc7\u591a\u7684\u533a\u95f4\u7814\u7a76\u4e0d\u4ec5\u6d6a\u8d39\u65f6\u95f4，\u8fd8\u5bb9\u6613\u51fa\u9519\u3002<\/p>\n

          \n
        • \u5982\u679c i * i == x，\u76f4\u63a5\u8fd4\u56de i；<\/li>\n
        • \u5982\u679c i * i > x，\u8bf4\u660e\u524d\u4e00\u4e2a\u6570 i-1 \u7684\u5e73\u65b9\u5df2\u7ecf\u8d85\u8fc7\u4e86 x，\u56e0\u6b64\u8fd4\u56de i – 1\u3002<\/li>\n<\/ul>\n

          \u7531\u4e8e i * i \u53ef\u80fd\u4f1a\u8d85\u8fc7 int \u7684\u6700\u5927\u503c，\u6240\u4ee5\u5e94\u4f7f\u7528 long long \u7c7b\u578b\u6765\u5b58\u50a8\u53d8\u91cf\u3002<\/p>\n

          class<\/span> Solution<\/span> {<\/span>
          \npublic<\/span>:<\/span>
          \n int<\/span> mySqrt<\/span>(<\/span>int<\/span> x)<\/span> {<\/span>
          \n \/\/ \u4f7f\u7528 long long \u6765\u907f\u514d\u6ea2\u51fa<\/span>
          \n long<\/span> long<\/span> i =<\/span> 0<\/span>;<\/span>
          \n for<\/span> (<\/span>i =<\/span> 0<\/span>;<\/span> i <=<\/span> x;<\/span> i++<\/span>)<\/span> {<\/span>
          \n \/\/ \u5982\u679c\u5e73\u65b9\u7b49\u4e8e x，\u8fd4\u56de i<\/span>
          \n if<\/span> (<\/span>i *<\/span> i ==<\/span> x)<\/span> return<\/span> i;<\/span>
          \n \/\/ \u5982\u679c\u5e73\u65b9\u5927\u4e8e x，\u8fd4\u56de i – 1<\/span>
          \n if<\/span> (<\/span>i *<\/span> i ><\/span> x)<\/span> return<\/span> i –<\/span> 1<\/span>;<\/span>
          \n }<\/span>
          \n \/\/ \u4e3a\u4e86\u786e\u4fdd\u6240\u6709\u8def\u5f84\u6709\u8fd4\u56de\u503c<\/span>
          \n return<\/span> –<\/span>1<\/span>;<\/span>
          \n }<\/span>
          \n}<\/span>;<\/span><\/p>\n

          2.\u4e8c\u5206\u67e5\u627e<\/p>\n

          \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

          \u8bbex\u7684\u5e73\u5206\u6839\u7684\u6700\u7ec8\u7ed3\u679c\u4e3aret\u3002\u5206\u6790ret\u5de6\u53f3\u4e24\u4fa7\u6570\u636e\u7684\u7279\u70b9，\u4ece\u800c\u53d1\u73b0\u4e8c\u6bb5\u6027\u3002<\/p>\n

          \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

          \u3010\u4ee3\u7801\u5b9e\u73b0\u3011<\/p>\n

          class<\/span> Solution<\/span> {<\/span>
          \npublic<\/span>:<\/span>
          \n int<\/span> mySqrt<\/span>(<\/span>int<\/span> x)<\/span>
          \n {<\/span>
          \n int<\/span> left =<\/span> 1<\/span>,<\/span> right =<\/span> x;<\/span>
          \n if<\/span>(<\/span>x <<\/span> 1<\/span>)<\/span> return<\/span> 0<\/span>;<\/span>\/\/\u5904\u7406\u4e0b\u8fb9\u754c\u60c5\u51b5<\/span>
          \n while<\/span>(<\/span>left <<\/span> right)<\/span>
          \n {<\/span>
          \n long<\/span> long<\/span> mid =<\/span> left +<\/span> (<\/span>right –<\/span> left +<\/span> 1<\/span>)<\/span>\/<\/span>2<\/span>;<\/span>
          \n if<\/span>(<\/span>mid *<\/span> mid <=<\/span> x)<\/span> left =<\/span> mid;<\/span>
          \n else<\/span> right =<\/span> mid –<\/span> 1<\/span>;<\/span>
          \n }<\/span>
          \n return<\/span> left;<\/span>
          \n }<\/span>
          \n}<\/span>;<\/span><\/p>\n

          \n

          35.\u641c\u7d22\u63d2\u5165\u4f4d\u7f6e<\/font><\/h3>\n

          \u3010\u9898\u76ee\u3011：35. \u641c\u7d22\u63d2\u5165\u4f4d\u7f6e <\/p>\n

          \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

          \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

          \u63d2\u5165\u4f4d\u7f6e\u662f\u7b2c\u4e00\u4e2a\u5927\u4e8e\u76ee\u6807\u503c\u7684\u6570，\u6216\u8005\u662f\u6700\u540e\u4e00\u4e2a\u6570\u636e\u3002\u5982\u679c\u5f53\u524d\u7684\u6570\u5927\u4e8e\u6216\u7b49\u4e8e\u76ee\u6807\u503c，\u90a3\u4e48\u8fd9\u91cc\u5c31\u662f\u6211\u4eec\u6240\u9700\u7684\u4e8c\u5206\u533a\u95f4\u3002\u5982\u679c\u6ca1\u6709\u5143\u7d20，\u5728\u6700\u540e\u4e00\u4e2a\u4f4d\u7f6e，\u7279\u6b8a\u60c5\u51b5\u7279\u6b8a\u5904\u7406\u3002<\/p>\n

          \"\u5916\u94fe\u56fe\u7247\u8f6c\u5b58\u5931\u8d25,\u6e90\u7ad9\u53ef\u80fd\u6709\u9632\u76d7\u94fe\u673a\u5236,\u5efa\u8bae\u5c06\u56fe\u7247\u4fdd\u5b58\u4e0b\u6765\u76f4\u63a5\u4e0a\u4f20\"<\/p>\n

          \u3010\u4ee3\u7801\u5b9e\u73b0\u3011<\/p>\n

          class<\/span> Solution<\/span> {<\/span>
          \npublic<\/span>:<\/span>
          \n int<\/span> searchInsert<\/span>(<\/span>vector<<\/span>int<\/span>><\/span>&<\/span> nums,<\/span> int<\/span> target)<\/span>
          \n {<\/span>
          \n int<\/span> left =<\/span> 0<\/span>,<\/span> right =<\/span> nums.<\/span>size<\/span>(<\/span>)<\/span> –<\/span> 1<\/span>;<\/span>
          \n while<\/span>(<\/span>left <<\/span> right)<\/span>
          \n {<\/span>
          \n int<\/span> mid =<\/span> left +<\/span> (<\/span>right –<\/span> left)<\/span>\/<\/span>2<\/span>;<\/span>
          \n if<\/span>(<\/span>nums[<\/span>mid]<\/span> <<\/span> target)<\/span> left =<\/span> mid +<\/span>1<\/span> ;<\/span>
          \n else<\/span> right =<\/span> mid;<\/span>
          \n }<\/span>
          \n if<\/span>(<\/span>nums[<\/span>left]<\/span> <<\/span> target)<\/span> return<\/span> right +<\/span> 1<\/span>;<\/span>
          \n else<\/span> return<\/span> right;<\/span>
          \n }<\/span>
          \n}<\/span>;<\/span><\/p>\n

          \u8fd9\u91cc\u9700\u8981\u5224\u65ad\u4e0b，\u5982\u679c\u8fbe\u5230\u6700\u540e\u4e00\u4e2a\u4f4d\u7f6e\u60c5\u51b5(nums[left] < target\u3002<\/p>\n

          \n

          69.\u5c71\u8109\u6570\u7ec4\u7684\u5cf0\u9876\u7d22\u5f15<\/font><\/h3>\n

          \u3010\u9898\u76ee\u3011：69. \u5c71\u8109\u6570\u7ec4\u7684\u5cf0\u9876\u7d22\u5f15<\/p>\n

          \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

          \u3010\u7b97\u6cd5\u601d\u8def<\/font>\u3011<\/p>\n

          \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

          \u901a\u8fc7\u7ed8\u56fe\u5206\u6790\u5143\u7d20\u4e4b\u95f4\u7684\u5927\u5c0f\u5173\u7cfb，\u4ece\u800c\u786e\u5b9a\u4e8c\u5206\u6cd5\u7684\u5212\u5206\u533a\u95f4\u3002<\/p>\n

          \u3010\u4ee3\u7801\u5b9e\u73b0\u3011<\/p>\n

          class<\/span> Solution<\/span> {<\/span>
          \npublic<\/span>:<\/span>
          \n int<\/span> peakIndexInMountainArray<\/span>(<\/span>vector<<\/span>int<\/span>><\/span>&<\/span> arr)<\/span>
          \n {<\/span>
          \n int<\/span> left =<\/span> 0<\/span>,<\/span> right =<\/span> arr.<\/span>size<\/span>(<\/span>)<\/span>–<\/span>1<\/span>;<\/span>
          \n while<\/span>(<\/span>left <<\/span> right)<\/span>
          \n {<\/span>
          \n int<\/span> mid =<\/span> left +<\/span> (<\/span>right –<\/span> left +<\/span> 1<\/span>)<\/span> \/<\/span> 2<\/span>;<\/span>
          \n if<\/span>(<\/span>arr[<\/span>mid –<\/span> 1<\/span>]<\/span> <=<\/span> arr[<\/span>mid]<\/span>)<\/span> left =<\/span> mid;<\/span>
          \n else<\/span> right =<\/span> mid –<\/span> 1<\/span>;<\/span>
          \n }<\/span>
          \n return<\/span> left;<\/span>
          \n }<\/span>
          \n}<\/span>;<\/span><\/p>\n

          \u3010\u7ec6\u8282\u5206\u6790\u3011<\/p>\n

          1.arr[mid – 1] <= arr[mid] \u662f\u5426\u4f1a\u8d8a\u754c？<\/p>\n

          \u5728 arr[mid – 1] \u4e2d，mid \u7684\u6700\u5c0f\u503c\u662f 1，\u56e0\u4e3a mid = left + (right – left + 1) \/ 2，\u800c left \u4ece 0 \u5f00\u59cb，mid \u6c38\u8fdc\u4e0d\u4f1a\u662f 0\u3002arr[mid – 1] \u8bbf\u95ee\u7684\u662f mid \u5de6\u8fb9\u7684\u5143\u7d20，\u56e0\u6b64\u4e0d\u4f1a\u8d8a\u754c\u3002<\/p>\n

          2.\u5982\u679c\u91c7\u7528arr[mid + 1]\u540e\u679c<\/p>\n

          \u5982\u679c\u662f arr[mid + 1]，\u90a3\u4f1a\u5bfc\u81f4\u5728 mid \u8fbe\u5230\u6570\u7ec4\u6700\u540e\u4e00\u4e2a\u5143\u7d20\u65f6\u8d8a\u754c，\u4f46\u662f\u8fd9\u79cd\u60c5\u51b5\u5728\u8fd9\u4e2a\u7b97\u6cd5\u4e2d\u5e76\u6ca1\u6709\u53d1\u751f，\u56e0\u4e3a\u6211\u4eec\u59cb\u7ec8\u662f\u5728 left \u5230 right \u7684\u8303\u56f4\u5185\u8fdb\u884c\u67e5\u627e，\u786e\u4fdd mid + 1 \u4e0d\u4f1a\u8d85\u51fa\u754c\u9650\u3002<\/p>\n

          \n

          162. \u5bfb\u627e\u5cf0\u503c<\/font><\/h3>\n

          \u3010\u9898\u76ee\u3011：162. \u5bfb\u627e\u5cf0\u503c<\/p>\n

          \"\u5916\u94fe\u56fe\u7247\u8f6c\u5b58\u5931\u8d25,\u6e90\u7ad9\u53ef\u80fd\u6709\u9632\u76d7\u94fe\u673a\u5236,\u5efa\u8bae\u5c06\u56fe\u7247\u4fdd\u5b58\u4e0b\u6765\u76f4\u63a5\u4e0a\u4f20\"<\/p>\n

          \u89e3\u6cd5\u4e00：\u66b4\u529b\u89e3\u6cd5<\/p>\n

          \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

          \u89e3\u6cd5\u4e8c：\u6ed1\u52a8\u7a97\u53e3<\/p>\n

          \u901a\u8fc7\u4e24\u4e2a\u70b9\u7684\u5206\u6790，\u5982\u679carr[i]>arr[i+1]，\u5448\u73b0\u4e0b\u964d\u8d8b\u52bf，\u53ef\u4ee5\u5224\u65ad\u5de6\u8fb9\u4e00\u5b9a\u6709\u5cf0\u503c，\u4f46\u662f\u53f3\u8fb9\u4e0d\u4e00\u5b9a\u6709\u5cf0\u503c，\u53ef\u80fd\u662f\u76f4\u63a5\u5230\u8d1f\u65e0\u7a77\u6216\u8005\u53e6\u8d77\u4e00\u5cf0\u3002\u540c\u7406arr[i]<arr[i+1]，\u5448\u73b0\u4e0a\u5347\u8d8b\u52bf，\u53ef\u4ee5\u5224\u65ad\u53f3\u8fb9\u4e00\u5b9a\u6709\u5cf0\u503c，\u4f46\u662f\u5de6\u8fb9\u4e0d\u4e00\u5b9a\u6709\u5cf0\u503c\u3002<\/p>\n

          \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

          \u6211\u4eec\u53ef\u4ee5\u6839\u636e1，2\u79cd\u60c5\u51b5\u53bb\u5206\u51fa\u4e8c\u6bb5\u6027，\u5c31\u53ef\u4ee5\u4f7f\u7528\u4e8c\u5206\u67e5\u627e\u3002<\/p>\n

          \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

          \u5982\u679carr[mid] > arr[mid+1]，\u5219\u5de6\u4fa7\u4e00\u5b9a\u6709\u6211\u4eec\u7684\u7ed3\u679c，\u53ea\u9700right\u7b49\u4e8emid，\u800carr[mid] < arr[mid+1]，\u5219\u53f3\u4fa7\u4e00\u5b9a\u6709\u6211\u4eec\u7684\u7ed3\u679c，left\u7b49\u4e8emid +1\u53bb\u67e5\u627e\u3002<\/p>\n

          \u3010\u4ee3\u7801\u5b9e\u73b0\u3011<\/p>\n

          class<\/span> Solution<\/span> {<\/span>
          \npublic<\/span>:<\/span>
          \n int<\/span> findPeakElement<\/span>(<\/span>vector<<\/span>int<\/span>><\/span>&<\/span> nums)<\/span>
          \n {<\/span>
          \n int<\/span> left =<\/span> 0<\/span>,<\/span>rigth =<\/span> nums.<\/span>size<\/span>(<\/span>)<\/span> –<\/span> 1<\/span>;<\/span>
          \n while<\/span>(<\/span>left <<\/span> rigth)<\/span>
          \n {<\/span>
          \n int<\/span> mid =<\/span> left +<\/span> (<\/span>rigth –<\/span> left +<\/span> 1<\/span>)<\/span>\/<\/span>2<\/span>;<\/span>
          \n if<\/span>(<\/span>nums[<\/span>mid –<\/span> 1<\/span>]<\/span> <<\/span> nums[<\/span>mid]<\/span>)<\/span> left =<\/span> mid;<\/span>
          \n else<\/span> rigth =<\/span> mid –<\/span> 1<\/span>;<\/span>
          \n }<\/span>
          \n return<\/span> left;<\/span>
          \n }<\/span>
          \n}<\/span>;<\/span><\/p>\n

          \u3010\u4e2a\u4eba\u601d\u8003<\/font>\u3011<\/p>\n

          \u5173\u4e8eleft\u548cright\u79fb\u52a8\u89c4\u5f8b，\u9700\u8981\u901a\u8fc7\u7ed8\u56fe\u53bb\u5206\u6790\u8d70\u5411\u3002\u8fd9\u91cc\u5f88\u597d\u901a\u8fc7\u8868\u793a\u4e86\u76ee\u6807\u503c\u662f\u5426\u5b58\u5728\u4f5c\u4e3a\u7a81\u7834\u53e3，\u53d1\u73b0\u4e8c\u6bb5\u6027\u3002\u6240\u4ee5\u5177\u4f53\u60c5\u51b5\u8fd8\u662f\u9700\u8981\u5177\u4f53\u5206\u6790\u7684\u3002<\/p>\n

          \n

          153. \u5bfb\u627e\u65cb\u8f6c\u6392\u5e8f\u6570\u7ec4\u4e2d\u7684\u6700\u5c0f\u503c<\/font><\/h3>\n

          \u3010\u9898\u76ee\u3011：153. \u5bfb\u627e\u65cb\u8f6c\u6392\u5e8f\u6570\u7ec4\u4e2d\u7684\u6700\u5c0f\u503c<\/p>\n

          \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

          \u793a\u4f8b 1：<\/p>\n

          \u8f93\u5165：nums =<\/span> [<\/span>3<\/span>,<\/span>4<\/span>,<\/span>5<\/span>,<\/span>1<\/span>,<\/span>2<\/span>]<\/span>
          \n\u8f93\u51fa：1<\/span>
          \n\u89e3\u91ca：\u539f\u6570\u7ec4\u4e3a [<\/span>1<\/span>,<\/span>2<\/span>,<\/span>3<\/span>,<\/span>4<\/span>,<\/span>5<\/span>]<\/span> ，\u65cb\u8f6c 3<\/span> \u6b21\u5f97\u5230\u8f93\u5165\u6570\u7ec4\u3002<\/p>\n

          \u793a\u4f8b 2：<\/p>\n

          \u8f93\u5165：nums =<\/span> [<\/span>4<\/span>,<\/span>5<\/span>,<\/span>6<\/span>,<\/span>7<\/span>,<\/span>0<\/span>,<\/span>1<\/span>,<\/span>2<\/span>]<\/span>
          \n\u8f93\u51fa：0<\/span>
          \n\u89e3\u91ca：\u539f\u6570\u7ec4\u4e3a [<\/span>0<\/span>,<\/span>1<\/span>,<\/span>2<\/span>,<\/span>4<\/span>,<\/span>5<\/span>,<\/span>6<\/span>,<\/span>7<\/span>]<\/span> ，\u65cb\u8f6c 4<\/span> \u6b21\u5f97\u5230\u8f93\u5165\u6570\u7ec4\u3002<\/p>\n

          \u89e3\u6cd5\u4e00：\u66b4\u529b\u89e3\u6cd5<\/p>\n

          \u66b4\u529b\u67e5\u627e\u6700\u5c0f\u503c，\u65f6\u95f4\u590d\u6742\u5ea6O(N)\u3002\u66b4\u529b\u89e3\u6cd5\u6162，\u662f\u6ca1\u6709\u5229\u7528\u8fd9\u4e2a\u6570\u7ec4\u7684\u7279\u6027，\u7ecf\u8fc7\u65cb\u8f6c\u7684\u6709\u5e8f\u6570\u7ec4\u3002<\/p>\n

          \u89e3\u6cd5\u4e8c：\u4e8c\u5206\u67e5\u770b<\/p>\n

          \u753b\u5f20\u66f2\u7ebf\u56fe，\u5bfb\u627e\u4e8c\u6bb5\u6027，\u4ee5D\u70b9nums[n-1]\u4e3a\u53c2\u7167\u7269，AB\u533a\u57df\u662f\u4e25\u683c\u5927\u4e8eD\u70b9，CD\u533a\u57df\u662f\u5c0f\u4e8e\u7b49\u4e8eD\u70b9\u7684\u3002<\/p>\n

          \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

          \u901a\u8fc7mid\u5728\u67d0\u4e2a\u533a\u95f4\u5982\u4f55\u79fb\u52a8，\u53bb\u63a8\u5230\u4e24\u4e2a\u53d8\u91cf\u7684\u79fb\u52a8\u65b9\u5f0f\u3002<\/p>\n

          \u3010\u4ee3\u7801\u5b9e\u73b0\u3011<\/p>\n

          class<\/span> Solution<\/span> {<\/span>
          \npublic<\/span>:<\/span>
          \n int<\/span> findMin<\/span>(<\/span>vector<<\/span>int<\/span>><\/span>&<\/span> nums)<\/span>
          \n {<\/span>
          \n int<\/span> left =<\/span> 0<\/span>,<\/span>right =<\/span> nums.<\/span>size<\/span>(<\/span>)<\/span> –<\/span> 1<\/span>;<\/span>
          \n int<\/span> x =<\/span>nums[<\/span>right]<\/span>;<\/span>
          \n while<\/span>(<\/span>left <<\/span> right)<\/span>
          \n {<\/span>
          \n int<\/span> mid =<\/span> left +<\/span> (<\/span>right –<\/span> left)<\/span>\/<\/span>2<\/span>;<\/span>
          \n if<\/span>(<\/span>nums[<\/span>mid]<\/span> ><\/span> x)<\/span> left =<\/span> mid +<\/span> 1<\/span>;<\/span>
          \n else<\/span> right =<\/span> mid;<\/span>
          \n }<\/span>
          \n return<\/span> nums[<\/span>left]<\/span>;<\/span>
          \n }<\/span>
          \n}<\/span>;<\/span><\/p>\n

          \u3010\u7591\u95ee:\u9009\u62e9A\u70b9\u7684\u503c\u4f5c\u4e3a\u53c2\u7167\u7269\u3011<\/p>\n

          \u90a3\u4e48x = nums[0]，\u901a\u8fc7\u7ed8\u56fe\u548cmid\u843d\u70b9\u53bb\u63a8\u5bfcleft\u548cright\u79fb\u52a8\u65b9\u5f0f\u5373\u53ef\u3002<\/p>\n

          \n

          LCR 173. \u70b9\u540d<\/font><\/h3>\n

          \u3010\u9898\u76ee\u3011：LCR 173. \u70b9\u540d<\/p>\n

          \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

          1.\u5e38\u89c1\u89e3\u6cd5<\/p>\n

        • \u54c8\u5e0c\u8868\u6cd5 \u521b\u5efa\u4e00\u4e2a\u5927\u5c0f\u4e3a n+1 \u7684\u54c8\u5e0c\u8868，\u904d\u5386\u539f\u59cb\u6570\u7ec4\u5e76\u5c06\u5143\u7d20\u586b\u5165\u54c8\u5e0c\u8868，\u7136\u540e\u68c0\u67e5\u54ea\u4e2a\u4f4d\u7f6e\u6ca1\u6709\u88ab\u586b\u5145，\u8fd9\u5c31\u662f\u7f3a\u5931\u7684\u6570\u5b57\u3002<\/li>\n
        • \u76f4\u63a5\u904d\u5386\u6cd5 \u76f4\u63a5\u904d\u5386\u539f\u6570\u7ec4，\u627e\u5230\u7f3a\u5931\u7684\u5143\u7d20\u3002<\/li>\n
        • \u4f4d\u8fd0\u7b97\u6cd5 (XOR) \u4f7f\u7528\u4f4d\u8fd0\u7b97（XOR）\u6765\u62b5\u6d88\u91cd\u590d\u51fa\u73b0\u7684\u6570\u5b57，\u6700\u7ec8\u5269\u4e0b\u7684\u5c31\u662f\u7f3a\u5931\u7684\u6570\u5b57\u3002<\/li>\n
        • \u6570\u5b66\u6cd5 (\u9ad8\u65af\u6c42\u548c\u516c\u5f0f) \u5229\u7528\u7b49\u5dee\u6570\u5217\u7684\u6c42\u548c\u516c\u5f0f，\u8ba1\u7b97\u4ece 0 \u5230 n \u7684\u603b\u548c\u4e0e\u6570\u7ec4\u4e2d\u6240\u6709\u5143\u7d20\u7684\u548c\u4e4b\u95f4\u7684\u5dee\u503c，\u5f97\u51fa\u7f3a\u5931\u7684\u6570\u5b57\u3002<\/li>\n

          \u8fd9\u4e9b\u65b9\u6cd5\u7684\u65f6\u95f4\u590d\u6742\u5ea6\u90fd\u662f O(n)，\u56e0\u6b64\u9002\u5408\u5904\u7406\u5927\u89c4\u6a21\u6570\u636e\u3002<\/p>\n

          2.\u4e8c\u5206\u67e5\u627e<\/p>\n

          \u3010\u601d\u8003：0 \u5230 n-1，\u4e3a\u4ec0\u4e48\u957f\u5ea6\u662f n-1？\u8fd9\u4e2a\u95ee\u9898\u5e38\u89c1\u4e8e\u9762\u8bd5\u4e2d，\u9762\u8bd5\u5b98\u53ef\u80fd\u4f1a\u4e0e\u4f60\u63a2\u8ba8\u662f\u5426\u8fd8\u6709\u5176\u4ed6\u89e3\u6cd5\u3002\u3011<\/p>\n

          \u8fd9\u91cc\u53ef\u4ee5\u6839\u636e\u56fe\u4e0b，\u53d1\u73b0\u4e8c\u6bb5\u6027\u4f7f\u7528\u4e8c\u5206\u67e5\u627e\u3002<\/p>\n

          \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

          \u901a\u8fc7\u6bd4\u8f83\u6570\u503c\u4e0e\u5bf9\u5e94\u4e0b\u6807\u7684\u5173\u7cfb，\u4f5c\u4e3a\u4e8c\u5206\u6cd5\u7684\u5224\u5b9a\u6807\u51c6，\u4ece\u800c\u5212\u5206\u641c\u7d22\u533a\u95f4\u3002<\/p>\n

          class<\/span> Solution<\/span> {<\/span>
          \npublic<\/span>:<\/span>
          \n int<\/span> takeAttendance<\/span>(<\/span>vector<<\/span>int<\/span>><\/span>&<\/span> records)<\/span>
          \n {<\/span>
          \n int<\/span> left =<\/span> 0<\/span>,<\/span>rigth =<\/span> records.<\/span>size<\/span>(<\/span>)<\/span> –<\/span> 1<\/span>;<\/span>
          \n while<\/span>(<\/span>left <<\/span> rigth)<\/span>
          \n {<\/span>
          \n int<\/span> mid =<\/span> left +<\/span> (<\/span>rigth –<\/span> left)<\/span> \/<\/span> 2<\/span>;<\/span>
          \n if<\/span>(<\/span>records[<\/span>mid]<\/span> ==<\/span> mid)<\/span> left =<\/span> mid +<\/span> 1<\/span>;<\/span>
          \n else<\/span> rigth =<\/span> mid;<\/span>
          \n }<\/span>
          \n if<\/span>(<\/span>records[<\/span>left]<\/span> ==<\/span> left)<\/span> return<\/span> left +<\/span> 1<\/span>;<\/span>
          \n else<\/span> return<\/span> left;<\/span><\/p>\n

          }<\/span>
          \n}<\/span>;<\/span><\/p>\n

          \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \u5feb\u548c\u5c0f\u4e8c\u4e00\u8d77\u8e0f\u4e0a\u7cbe\u5f69\u7684\u7b97\u6cd5\u4e4b\u65c5！\u5173\u6ce8\u6211，\u6211\u4eec\u5c06\u4e00\u8d77\u7834\u89e3\u7b97\u6cd5\u5965\u79d8，\u63a2\u7d22\u66f4\u591a\u5b9e\u7528\u4e14\u6709\u8da3\u7684\u77e5\u8bc6，\u5f00\u542f\u5c5e\u4e8e\u4f60\u7684\u7f16\u7a0b\u5192\u9669！<\/font><\/p>\n","protected":false},"excerpt":{"rendered":"

          \u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb997\u6b21\uff0c\u70b9\u8d5e48\u6b21\uff0c\u6536\u85cf47\u6b21\u3002\u5728\u672c\u7bc7\u6587\u7ae0\u4e2d\uff0c\u6211\u4eec\u5c06\u6df1\u5165\u89e3\u6790\u4e8c\u5206\u67e5\u627e\u7b97\u6cd5\u7684\u6838\u5fc3\u539f\u7406\u3002\u4ece\u57fa\u672c\u6982\u5ff5\u5230\u5b9e\u9645\u5e94\u7528\uff0c\u5e26\u4f60\u4e86\u89e3\u5982\u4f55\u5229\u7528\u4e8c\u5206\u67e5\u627e\u9ad8\u6548\u5b9a\u4f4d\u5143\u7d20\uff0c\u63d0\u5347\u641c\u7d22\u6548\u7387\u3002\u65e0\u8bba\u4f60\u662f\u521a\u63a5\u89e6\u7b97\u6cd5\u7684\u65b0\u624b\uff0c\u8fd8\u662f\u60f3\u4f18\u5316\u4ee3\u7801\u6027\u80fd\u7684\u8001\u624b\uff0c\u4e8c\u5206\u67e5\u627e\u90fd\u662f\u4f60\u4e0d\u53ef\u5ffd\u89c6\u7684\u5f3a\u5927\u5de5\u5177\uff01<\/p>\n","protected":false},"author":2,"featured_media":34205,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[2889,55,427,2888],"topic":[],"class_list":["post-34225","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-2889","tag-c","tag-427","tag-2888"],"yoast_head":"\n\u3010\u4f18\u9009\u7b97\u6cd5 | \u4e8c\u5206\u67e5\u627e\u3011\u4e8c\u5206\u67e5\u627e\u7b97\u6cd5\u89e3\u6790\uff1a\u5982\u4f55\u901a\u8fc7\u4e8c\u6bb5\u6027\u4f18\u5316\u641c\u7d22\u6548\u7387 - 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