{"id":168098,"date":"2021-11-18T22:24:04","date_gmt":"2021-11-18T14:24:04","guid":{"rendered":"http:\/\/www.idc.net\/help\/168098\/"},"modified":"2021-11-18T22:24:04","modified_gmt":"2021-11-18T14:24:04","slug":"%e5%90%8e%e6%b5%aa%e4%ba%91python%e6%95%99%e7%a8%8b%ef%bc%9apython%e4%b8%ad%e5%b8%b8%e7%94%a8%e7%9a%84%e6%9f%a5%e6%89%be%e6%95%b0%e6%8d%ae%e7%bb%93%e6%9e%84%e5%8f%8a%e7%ae%97%e6%b3%95%e6%b1%87","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/168098\/","title":{"rendered":"\u540e\u6d6a\u4e91Python\u6559\u7a0b\uff1aPython\u4e2d\u5e38\u7528\u7684\u67e5\u627e\u6570\u636e\u7ed3\u6784\u53ca\u7b97\u6cd5\u6c47\u603b"},"content":{"rendered":"<\/p>\n<p><strong><img decoding=\"async\" src=\"https:\/\/oss.py.cn\/pycn\/upload\/article\/000\/000\/003\/5d14875db4642559.jpg\" class=\"aligncenter\"><\/strong><\/p>\n<p><strong>\u4e00\u3001\u57fa\u672c\u6982\u5ff5<\/strong><\/p>\n<p>\u67e5\u627e\uff08Searching\uff09\u5c31\u662f\u6839\u636e\u7ed9\u5b9a\u7684\u67d0\u4e2a\u503c\uff0c\u5728\u67e5\u627e\u8868\u4e2d\u786e\u5b9a\u4e00\u4e2a\u5176\u5173\u952e\u5b57\u7b49\u4e8e\u7ed9\u5b9a\u503c\u7684\u6570\u636e\u5143\u7d20\uff08\u6216\u8bb0\u5f55\uff09\u3002<\/p>\n<p>\u67e5\u627e\u8868\uff08Search Table\uff09\uff1a\u7531\u540c\u4e00\u7c7b\u578b\u7684\u6570\u636e\u5143\u7d20\uff08\u6216\u8bb0\u5f55\uff09\u6784\u6210\u7684\u96c6\u5408<br \/>\u5173\u952e\u5b57\uff08Key\uff09\uff1a\u6570\u636e\u5143\u7d20\u4e2d\u67d0\u4e2a\u6570\u636e\u9879\u7684\u503c\uff0c\u53c8\u79f0\u4e3a\u952e\u503c\u3002<br \/>\u4e3b\u952e\uff08Primary Key\uff09\uff1a\u53ef\u552f\u4e00\u5730\u6807\u8bc6\u67d0\u4e2a\u6570\u636e\u5143\u7d20\u6216\u8bb0\u5f55\u7684\u5173\u952e\u5b57\u3002<\/p>\n<p>\u67e5\u627e\u8868\u6309\u7167\u64cd\u4f5c\u65b9\u5f0f\u53ef\u5206\u4e3a\uff1a<\/p>\n<p>\u9759\u6001\u67e5\u627e\u8868\uff08Static Search Table\uff09\uff1a\u53ea\u505a\u67e5\u627e\u64cd\u4f5c\u7684\u67e5\u627e\u8868\u3002\u5b83\u7684\u4e3b\u8981\u64cd\u4f5c\u662f\uff1a\u67e5\u8be2\u67d0\u4e2a\u201c\u7279\u5b9a\u7684\u201d\u6570\u636e\u5143\u7d20\u662f\u5426\u5728\u8868\u4e2d\u68c0\u7d22\u67d0\u4e2a\u201c\u7279\u5b9a\u7684\u201d\u6570\u636e\u5143\u7d20\u548c\u5404\u79cd\u5c5e\u6027\u52a8\u6001\u67e5\u627e\u8868\uff08Dynamic Search Table\uff09\uff1a\u5728\u67e5\u627e\u4e2d\u540c\u65f6\u8fdb\u884c\u63d2\u5165\u6216\u5220\u9664\u7b49\u64cd\u4f5c\uff1a\u67e5\u627e\u65f6\u63d2\u5165\u6570\u636e\u67e5\u627e\u65f6\u5220\u9664\u6570\u636e<\/p>\n<p><strong>\u4e8c\u3001\u65e0\u5e8f\u8868\u67e5\u627e<\/strong><\/p>\n<p>\u4e5f\u5c31\u662f\u6570\u636e\u4e0d\u6392\u5e8f\u7684\u7ebf\u6027\u67e5\u627e\uff0c\u904d\u5386\u6570\u636e\u5143\u7d20\u3002<br \/>\u7b97\u6cd5\u5206\u6790\uff1a\u6700\u597d\u60c5\u51b5\u662f\u5728\u7b2c\u4e00\u4e2a\u4f4d\u7f6e\u5c31\u627e\u5230\u4e86\uff0c\u6b64\u4e3aO(1)\uff1b\u6700\u574f\u60c5\u51b5\u5728\u6700\u540e\u4e00\u4e2a\u4f4d\u7f6e\u624d\u627e\u5230\uff0c\u6b64\u4e3aO(n)\uff1b\u6240\u4ee5\u5e73\u5747\u67e5\u627e\u6b21\u6570\u4e3a(n+1)\/2\u3002\u6700\u7ec8\u65f6\u95f4\u590d\u6742\u5ea6\u4e3aO(n)<\/p>\n<pre>#&nbsp;\u6700\u57fa\u7840\u7684\u904d\u5386\u65e0\u5e8f\u5217\u8868\u7684\u67e5\u627e\u7b97\u6cd5#&nbsp;\u65f6\u95f4\u590d\u6742\u5ea6O(n)\ndef&nbsp;sequential_search(lis,&nbsp;key):\n&nbsp;&nbsp;&nbsp;&nbsp;length&nbsp;=&nbsp;len(lis)&nbsp;&nbsp;&nbsp;&nbsp;\n&nbsp;&nbsp;&nbsp;&nbsp;for&nbsp;i&nbsp;in&nbsp;range(length):&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if&nbsp;lis[i]&nbsp;==&nbsp;key:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return&nbsp;i&nbsp;&nbsp;&nbsp;&nbsp;\n&nbsp;&nbsp;&nbsp;&nbsp;else:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return&nbsp;False\nif&nbsp;__name__&nbsp;==&nbsp;'__main__':\n&nbsp;&nbsp;&nbsp;&nbsp;LIST&nbsp;=&nbsp;[1,&nbsp;5,&nbsp;8,&nbsp;123,&nbsp;22,&nbsp;54,&nbsp;7,&nbsp;99,&nbsp;300,&nbsp;222]\n&nbsp;&nbsp;&nbsp;&nbsp;result&nbsp;=&nbsp;sequential_search(LIST,&nbsp;123)\n&nbsp;&nbsp;&nbsp;&nbsp;print(result)<\/pre>\n<p><strong>\u4e09\u3001\u6709\u5e8f\u8868\u67e5\u627e<\/strong><\/p>\n<p>\u67e5\u627e\u8868\u4e2d\u7684\u6570\u636e\u5fc5\u987b\u6309\u67d0\u4e2a\u4e3b\u952e\u8fdb\u884c\u67d0\u79cd\u6392\u5e8f\uff01<\/p>\n<p>1. \u4e8c\u5206\u67e5\u627e(Binary Search)<\/p>\n<p>\u7b97\u6cd5\u6838\u5fc3\uff1a\u5728\u67e5\u627e\u8868\u4e2d\u4e0d\u65ad\u53d6\u4e2d\u95f4\u5143\u7d20\u4e0e\u67e5\u627e\u503c\u8fdb\u884c\u6bd4\u8f83\uff0c\u4ee5\u4e8c\u5206\u4e4b\u4e00\u7684\u500d\u7387\u8fdb\u884c\u8868\u8303\u56f4\u7684\u7f29\u5c0f\u3002<\/p>\n<pre>#&nbsp;\u9488\u5bf9\u6709\u5e8f\u67e5\u627e\u8868\u7684\u4e8c\u5206\u67e5\u627e\u7b97\u6cd5#&nbsp;\u65f6\u95f4\u590d\u6742\u5ea6O(log(n))\ndef&nbsp;binary_search(lis,&nbsp;key):\n&nbsp;&nbsp;&nbsp;&nbsp;low&nbsp;=&nbsp;0\n&nbsp;&nbsp;&nbsp;&nbsp;high&nbsp;=&nbsp;len(lis)&nbsp;-&nbsp;1\n&nbsp;&nbsp;&nbsp;&nbsp;time&nbsp;=&nbsp;0\n&nbsp;&nbsp;&nbsp;&nbsp;while&nbsp;low&nbsp;&lt;&nbsp;high:\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;time&nbsp;+=&nbsp;1\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;mid&nbsp;=&nbsp;int((low&nbsp;+&nbsp;high)&nbsp;\/&nbsp;2)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if&nbsp;key&nbsp;&lt;&nbsp;lis[mid]:\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;high&nbsp;=&nbsp;mid&nbsp;-&nbsp;1\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;elif&nbsp;key&nbsp;&gt;&nbsp;lis[mid]:\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;low&nbsp;=&nbsp;mid&nbsp;+&nbsp;1\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;else:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;#&nbsp;\u6253\u5370\u6298\u534a\u7684\u6b21\u6570\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;print(\"times:&nbsp;%s\"&nbsp;%&nbsp;time)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return&nbsp;mid\n&nbsp;&nbsp;&nbsp;&nbsp;print(\"times:&nbsp;%s\"&nbsp;%&nbsp;time)&nbsp;&nbsp;&nbsp;&nbsp;return&nbsp;Falseif&nbsp;__name__&nbsp;==&nbsp;'__main__':\n&nbsp;&nbsp;&nbsp;&nbsp;LIST&nbsp;=&nbsp;[1,&nbsp;5,&nbsp;7,&nbsp;8,&nbsp;22,&nbsp;54,&nbsp;99,&nbsp;123,&nbsp;200,&nbsp;222,&nbsp;444]\n&nbsp;&nbsp;&nbsp;&nbsp;result&nbsp;=&nbsp;binary_search(LIST,&nbsp;99)\n&nbsp;&nbsp;&nbsp;&nbsp;print(result)<\/pre>\n<p>2. \u63d2\u503c\u67e5\u627e<\/p>\n<p>\u4e8c\u5206\u67e5\u627e\u6cd5\u867d\u7136\u5df2\u7ecf\u5f88\u4e0d\u9519\u4e86\uff0c\u4f46\u8fd8\u6709\u53ef\u4ee5\u4f18\u5316\u7684\u5730\u65b9\u3002<br \/>\u6709\u7684\u65f6\u5019\uff0c\u5bf9\u534a\u8fc7\u6ee4\u8fd8\u4e0d\u591f\u72e0\uff0c\u8981\u662f\u6bcf\u6b21\u90fd\u6392\u9664\u5341\u5206\u4e4b\u4e5d\u7684\u6570\u636e\u5c82\u4e0d\u662f\u66f4\u597d\uff1f\u9009\u62e9\u8fd9\u4e2a\u503c\u5c31\u662f\u5173\u952e\u95ee\u9898\uff0c\u63d2\u503c\u7684\u610f\u4e49\u5c31\u662f\uff1a\u4ee5\u66f4\u5feb\u7684\u901f\u5ea6\u8fdb\u884c\u7f29\u51cf\u3002<\/p>\n<p>\u76f8\u5173\u63a8\u8350\uff1a\u300aPython\u89c6\u9891\u6559\u7a0b\u300b<\/p>\n<p>\u63d2\u503c\u7684\u6838\u5fc3\u5c31\u662f\u4f7f\u7528\u516c\u5f0f\uff1a<br \/>value = (key - list[low])\/(list[high] - list[low])<\/p>\n<p>\u7528\u8fd9\u4e2avalue\u6765\u4ee3\u66ff\u4e8c\u5206\u67e5\u627e\u4e2d\u76841\/2\u3002<br \/>\u4e0a\u9762\u7684\u4ee3\u7801\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528\uff0c\u53ea\u9700\u8981\u6539\u4e00\u53e5\u3002<\/p>\n<pre>#&nbsp;\u63d2\u503c\u67e5\u627e\u7b97\u6cd5#&nbsp;\u65f6\u95f4\u590d\u6742\u5ea6O(log(n))\ndef&nbsp;binary_search(lis,&nbsp;key):\n&nbsp;&nbsp;&nbsp;&nbsp;low&nbsp;=&nbsp;0\n&nbsp;&nbsp;&nbsp;&nbsp;high&nbsp;=&nbsp;len(lis)&nbsp;-&nbsp;1\n&nbsp;&nbsp;&nbsp;&nbsp;time&nbsp;=&nbsp;0\n&nbsp;&nbsp;&nbsp;&nbsp;while&nbsp;low&nbsp;&lt;&nbsp;high:\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;time&nbsp;+=&nbsp;1\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;#&nbsp;\u8ba1\u7b97mid\u503c\u662f\u63d2\u503c\u7b97\u6cd5\u7684\u6838\u5fc3\u4ee3\u7801\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;mid&nbsp;=&nbsp;low&nbsp;+&nbsp;int((high&nbsp;-&nbsp;low)&nbsp;*&nbsp;(key&nbsp;-&nbsp;lis[low])\/(lis[high]&nbsp;-&nbsp;lis[low]))\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;print(\"mid=%s,&nbsp;low=%s,&nbsp;high=%s\"&nbsp;%&nbsp;(mid,&nbsp;low,&nbsp;high))&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if&nbsp;key&nbsp;&lt;&nbsp;lis[mid]:\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;high&nbsp;=&nbsp;mid&nbsp;-&nbsp;1\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;elif&nbsp;key&nbsp;&gt;&nbsp;lis[mid]:\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;low&nbsp;=&nbsp;mid&nbsp;+&nbsp;1\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;else:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;#&nbsp;\u6253\u5370\u67e5\u627e\u7684\u6b21\u6570\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;print(\"times:&nbsp;%s\"&nbsp;%&nbsp;time)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return&nbsp;mid\n&nbsp;&nbsp;&nbsp;&nbsp;print(\"times:&nbsp;%s\"&nbsp;%&nbsp;time)&nbsp;&nbsp;&nbsp;&nbsp;return&nbsp;Falseif&nbsp;__name__&nbsp;==&nbsp;'__main__':\n&nbsp;&nbsp;&nbsp;&nbsp;LIST&nbsp;=&nbsp;[1,&nbsp;5,&nbsp;7,&nbsp;8,&nbsp;22,&nbsp;54,&nbsp;99,&nbsp;123,&nbsp;200,&nbsp;222,&nbsp;444]\n&nbsp;&nbsp;&nbsp;&nbsp;result&nbsp;=&nbsp;binary_search(LIST,&nbsp;444)\n&nbsp;&nbsp;&nbsp;&nbsp;print(result)<\/pre>\n<p>\u63d2\u503c\u7b97\u6cd5\u7684\u603b\u4f53\u65f6\u95f4\u590d\u6742\u5ea6\u4ecd\u7136\u5c5e\u4e8eO(log(n))\u7ea7\u522b\u7684\u3002\u5176\u4f18\u70b9\u662f\uff0c\u5bf9\u4e8e\u8868\u5185\u6570\u636e\u91cf\u8f83\u5927\uff0c\u4e14\u5173\u952e\u5b57\u5206\u5e03\u6bd4\u8f83\u5747\u5300\u7684\u67e5\u627e\u8868\uff0c\u4f7f\u7528\u63d2\u503c\u7b97\u6cd5\u7684\u5e73\u5747\u6027\u80fd\u6bd4\u4e8c\u5206\u67e5\u627e\u8981\u597d\u5f97\u591a\u3002\u53cd\u4e4b\uff0c\u5bf9\u4e8e\u5206\u5e03\u6781\u7aef\u4e0d\u5747\u5300\u7684\u6570\u636e\uff0c\u5219\u4e0d\u9002\u5408\u4f7f\u7528\u63d2\u503c\u7b97\u6cd5\u3002<\/p>\n<p><strong>3. \u6590\u6ce2\u90a3\u5951\u67e5\u627e<\/strong><\/p>\n<p>\u7531\u63d2\u503c\u7b97\u6cd5\u5e26\u6765\u7684\u542f\u53d1\uff0c\u53d1\u660e\u4e86\u6590\u6ce2\u90a3\u5951\u7b97\u6cd5\u3002\u5176\u6838\u5fc3\u4e5f\u662f\u5982\u4f55\u4f18\u5316\u90a3\u4e2a\u7f29\u51cf\u901f\u7387\uff0c\u4f7f\u5f97\u67e5\u627e\u6b21\u6570\u5c3d\u91cf\u964d\u4f4e\u3002<br \/>\u4f7f\u7528\u8fd9\u79cd\u7b97\u6cd5\uff0c\u524d\u63d0\u662f\u5df2\u7ecf\u6709\u4e00\u4e2a\u5305\u542b\u6590\u6ce2\u90a3\u5951\u6570\u636e\u7684\u5217\u8868<br \/>F = [1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144,...]<\/p>\n<pre>#&nbsp;\u6590\u6ce2\u90a3\u5951\u67e5\u627e\u7b97\u6cd5#&nbsp;\u65f6\u95f4\u590d\u6742\u5ea6O(log(n))def&nbsp;fibonacci_search(lis,&nbsp;key):\n&nbsp;&nbsp;&nbsp;&nbsp;#&nbsp;\u9700\u8981\u4e00\u4e2a\u73b0\u6210\u7684\u6590\u6ce2\u90a3\u5951\u5217\u8868\u3002\u5176\u5143\u7d20\u7684\u503c\u5fc5\u987b\u8d85\u8fc7\u67e5\u627e\u8868\u4e2d\u5143\u7d20\u4e2a\u6570\u7684\u6570\u503c\u3002\n&nbsp;&nbsp;&nbsp;&nbsp;F&nbsp;=&nbsp;[1,&nbsp;1,&nbsp;2,&nbsp;3,&nbsp;5,&nbsp;8,&nbsp;13,&nbsp;21,&nbsp;34,&nbsp;55,&nbsp;89,&nbsp;144,&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;233,&nbsp;377,&nbsp;610,&nbsp;987,&nbsp;1597,&nbsp;2584,&nbsp;4181,&nbsp;6765,&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;10946,&nbsp;17711,&nbsp;28657,&nbsp;46368]\n&nbsp;&nbsp;&nbsp;&nbsp;low&nbsp;=&nbsp;0\n&nbsp;&nbsp;&nbsp;&nbsp;high&nbsp;=&nbsp;len(lis)&nbsp;-&nbsp;1\n&nbsp;&nbsp;&nbsp;&nbsp;\n&nbsp;&nbsp;&nbsp;&nbsp;#&nbsp;\u4e3a\u4e86\u4f7f\u5f97\u67e5\u627e\u8868\u6ee1\u8db3\u6590\u6ce2\u90a3\u5951\u7279\u6027\uff0c\u5728\u8868\u7684\u6700\u540e\u6dfb\u52a0\u51e0\u4e2a\u540c\u6837\u7684\u503c\n&nbsp;&nbsp;&nbsp;&nbsp;#&nbsp;\u8fd9\u4e2a\u503c\u662f\u539f\u67e5\u627e\u8868\u7684\u6700\u540e\u90a3\u4e2a\u5143\u7d20\u7684\u503c\n&nbsp;&nbsp;&nbsp;&nbsp;#&nbsp;\u6dfb\u52a0\u7684\u4e2a\u6570\u7531F[k]-1-high\u51b3\u5b9a\n&nbsp;&nbsp;&nbsp;&nbsp;k&nbsp;=&nbsp;0\n&nbsp;&nbsp;&nbsp;&nbsp;while&nbsp;high&nbsp;&gt;&nbsp;F[k]-1:\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;k&nbsp;+=&nbsp;1\n&nbsp;&nbsp;&nbsp;&nbsp;print(k)\n&nbsp;&nbsp;&nbsp;&nbsp;i&nbsp;=&nbsp;high&nbsp;&nbsp;&nbsp;&nbsp;while&nbsp;F[k]-1&nbsp;&gt;&nbsp;i:\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;lis.append(lis[high])\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;i&nbsp;+=&nbsp;1\n&nbsp;&nbsp;&nbsp;&nbsp;print(lis)&nbsp;&nbsp;&nbsp;&nbsp;\n&nbsp;&nbsp;&nbsp;&nbsp;#&nbsp;\u7b97\u6cd5\u4e3b\u903b\u8f91\u3002time\u7528\u4e8e\u5c55\u793a\u5faa\u73af\u7684\u6b21\u6570\u3002\n&nbsp;&nbsp;&nbsp;&nbsp;time&nbsp;=&nbsp;0\n&nbsp;&nbsp;&nbsp;&nbsp;while&nbsp;low&nbsp;&lt;=&nbsp;high:\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;time&nbsp;+=&nbsp;1\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;#&nbsp;\u4e3a\u4e86\u9632\u6b62F\u5217\u8868\u4e0b\u6807\u6ea2\u51fa\uff0c\u8bbe\u7f6eif\u548celse\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if&nbsp;k&nbsp;&lt;&nbsp;2:\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;mid&nbsp;=&nbsp;low&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;else:\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;mid&nbsp;=&nbsp;low&nbsp;+&nbsp;F[k-1]-1\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;print(\"low=%s,&nbsp;mid=%s,&nbsp;high=%s\"&nbsp;%&nbsp;(low,&nbsp;mid,&nbsp;high))&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if&nbsp;key&nbsp;&lt;&nbsp;lis[mid]:\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;high&nbsp;=&nbsp;mid&nbsp;-&nbsp;1\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;k&nbsp;-=&nbsp;1\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;elif&nbsp;key&nbsp;&gt;&nbsp;lis[mid]:\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;low&nbsp;=&nbsp;mid&nbsp;+&nbsp;1\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;k&nbsp;-=&nbsp;2\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;else:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if&nbsp;mid&nbsp;&lt;=&nbsp;high:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;#&nbsp;\u6253\u5370\u67e5\u627e\u7684\u6b21\u6570\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;print(\"times:&nbsp;%s\"&nbsp;%&nbsp;time)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return&nbsp;mid&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;else:\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;print(\"times:&nbsp;%s\"&nbsp;%&nbsp;time)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return&nbsp;high\n&nbsp;&nbsp;&nbsp;&nbsp;print(\"times:&nbsp;%s\"&nbsp;%&nbsp;time)&nbsp;&nbsp;&nbsp;&nbsp;return&nbsp;Falseif&nbsp;__name__&nbsp;==&nbsp;'__main__':\n&nbsp;&nbsp;&nbsp;&nbsp;LIST&nbsp;=&nbsp;[1,&nbsp;5,&nbsp;7,&nbsp;8,&nbsp;22,&nbsp;54,&nbsp;99,&nbsp;123,&nbsp;200,&nbsp;222,&nbsp;444]\n&nbsp;&nbsp;&nbsp;&nbsp;result&nbsp;=&nbsp;fibonacci_search(LIST,&nbsp;444)\n&nbsp;&nbsp;&nbsp;&nbsp;print(result)<\/pre>\n<p>\u7b97\u6cd5\u5206\u6790\uff1a\u6590\u6ce2\u90a3\u5951\u67e5\u627e\u7684\u6574\u4f53\u65f6\u95f4\u590d\u6742\u5ea6\u4e5f\u4e3aO(log(n))\u3002\u4f46\u5c31\u5e73\u5747\u6027\u80fd\uff0c\u8981\u4f18\u4e8e\u4e8c\u5206\u67e5\u627e\u3002\u4f46\u662f\u5728\u6700\u574f\u60c5\u51b5\u4e0b\uff0c\u6bd4\u5982\u8fd9\u91cc\u5982\u679ckey\u4e3a1\uff0c\u5219\u59cb\u7ec8\u5904\u4e8e\u5de6\u4fa7\u534a\u533a\u67e5\u627e\uff0c\u6b64\u65f6\u5176\u6548\u7387\u8981\u4f4e\u4e8e\u4e8c\u5206\u67e5\u627e\u3002<\/p>\n<p>\u603b\u7ed3\uff1a\u4e8c\u5206\u67e5\u627e\u7684mid\u8fd0\u7b97\u662f\u52a0\u6cd5\u4e0e\u9664\u6cd5\uff0c\u63d2\u503c\u67e5\u627e\u5219\u662f\u590d\u6742\u7684\u56db\u5219\u8fd0\u7b97\uff0c\u800c\u6590\u6ce2\u90a3\u5951\u67e5\u627e\u53ea\u662f\u6700\u7b80\u5355\u7684\u52a0\u51cf\u8fd0\u7b97\u3002\u5728\u6d77\u91cf\u6570\u636e\u7684\u67e5\u627e\u4e2d\uff0c\u8fd9\u79cd\u7ec6\u5fae\u7684\u5dee\u522b\u53ef\u80fd\u4f1a\u5f71\u54cd\u6700\u7ec8\u7684\u67e5\u627e\u6548\u7387\u3002\u56e0\u6b64\uff0c\u4e09\u79cd\u6709\u5e8f\u8868\u7684\u67e5\u627e\u65b9\u6cd5\u672c\u8d28\u4e0a\u662f\u5206\u5272\u70b9\u7684\u9009\u62e9\u4e0d\u540c\uff0c\u5404\u6709\u4f18\u52a3\uff0c\u5e94\u6839\u636e\u5b9e\u9645\u60c5\u51b5\u8fdb\u884c\u9009\u62e9\u3002<\/p>\n<p><strong>\u56db\u3001\u7ebf\u6027\u7d22\u5f15\u67e5\u627e<\/strong><\/p>\n<p>\u5bf9\u4e8e\u6d77\u91cf\u7684\u65e0\u5e8f\u6570\u636e\uff0c\u4e3a\u4e86\u63d0\u9ad8\u67e5\u627e\u901f\u5ea6\uff0c\u4e00\u822c\u4f1a\u4e3a\u5176\u6784\u9020\u7d22\u5f15\u8868\u3002<br \/>\u7d22\u5f15\u5c31\u662f\u628a\u4e00\u4e2a\u5173\u952e\u5b57\u4e0e\u5b83\u76f8\u5bf9\u5e94\u7684\u8bb0\u5f55\u8fdb\u884c\u5173\u8054\u7684\u8fc7\u7a0b\u3002<br \/>\u4e00\u4e2a\u7d22\u5f15\u7531\u82e5\u5e72\u4e2a\u7d22\u5f15\u9879\u6784\u6210\uff0c\u6bcf\u4e2a\u7d22\u5f15\u9879\u81f3\u5c11\u5305\u542b\u5173\u952e\u5b57\u548c\u5176\u5bf9\u5e94\u7684\u8bb0\u5f55\u5728\u5b58\u50a8\u5668\u4e2d\u7684\u4f4d\u7f6e\u7b49\u4fe1\u606f\u3002<br \/>\u7d22\u5f15\u6309\u7167\u7ed3\u6784\u53ef\u4ee5\u5206\u4e3a\uff1a\u7ebf\u6027\u7d22\u5f15\u3001\u6811\u5f62\u7d22\u5f15\u548c\u591a\u7ea7\u7d22\u5f15\u3002<br \/>\u7ebf\u6027\u7d22\u5f15\uff1a\u5c06\u7d22\u5f15\u9879\u7684\u96c6\u5408\u901a\u8fc7\u7ebf\u6027\u7ed3\u6784\u6765\u7ec4\u7ec7\uff0c\u4e5f\u53eb\u7d22\u5f15\u8868\u3002<br \/>\u7ebf\u6027\u7d22\u5f15\u53ef\u5206\u4e3a\uff1a\u7a20\u5bc6\u7d22\u5f15\u3001\u5206\u5757\u7d22\u5f15\u548c\u5012\u6392\u7d22\u5f15<\/p>\n<p><strong>\u7a20\u5bc6\u7d22\u5f15<\/strong><\/p>\n<p>\u7a20\u5bc6\u7d22\u5f15\u6307\u7684\u662f\u5728\u7ebf\u6027\u7d22\u5f15\u4e2d\uff0c\u4e3a\u6570\u636e\u96c6\u5408\u4e2d\u7684\u6bcf\u4e2a\u8bb0\u5f55\u90fd\u5efa\u7acb\u4e00\u4e2a\u7d22\u5f15\u9879\u3002<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/static.zybuluo.com\/feixuelove1009\/zql63gfci7xe9vr215fwan19\/image_1b2cl8r0dk1v1u0ssf0rmk8o29.png\" class=\"aligncenter\"><\/p>\n<p>\u8fd9\u5176\u5b9e\u5c31\u76f8\u5f53\u4e8e\u7ed9\u65e0\u5e8f\u7684\u96c6\u5408\uff0c\u5efa\u7acb\u4e86\u4e00\u5f20\u6709\u5e8f\u7684\u7ebf\u6027\u8868\u3002\u5176\u7d22\u5f15\u9879\u4e00\u5b9a\u662f\u6309\u7167\u5173\u952e\u7801\u8fdb\u884c\u6709\u5e8f\u7684\u6392\u5217\u3002<br \/>\u8fd9\u4e5f\u76f8\u5f53\u4e8e\u628a\u67e5\u627e\u8fc7\u7a0b\u4e2d\u9700\u8981\u7684\u6392\u5e8f\u5de5\u4f5c\u7ed9\u63d0\u524d\u505a\u4e86\u3002<\/p>\n<p><strong>\u5206\u5757\u7d22\u5f15<\/strong><\/p>\n<p>\u7ed9\u5927\u91cf\u7684\u65e0\u5e8f\u6570\u636e\u96c6\u5408\u8fdb\u884c\u5206\u5757\u5904\u7406\uff0c\u4f7f\u5f97\u5757\u5185\u65e0\u5e8f\uff0c\u5757\u4e0e\u5757\u4e4b\u95f4\u6709\u5e8f\u3002<br \/>\u8fd9\u5176\u5b9e\u662f\u6709\u5e8f\u67e5\u627e\u548c\u65e0\u5e8f\u67e5\u627e\u7684\u4e00\u79cd\u4e2d\u95f4\u72b6\u6001\u6216\u8005\u8bf4\u59a5\u534f\u72b6\u6001\u3002\u56e0\u4e3a\u6570\u636e\u91cf\u8fc7\u5927\uff0c\u5efa\u7acb\u5b8c\u6574\u7684\u7a20\u5bc6\u7d22\u5f15\u8017\u65f6\u8017\u529b\uff0c\u5360\u7528\u8d44\u6e90\u8fc7\u591a\uff1b\u4f46\u5982\u679c\u4e0d\u505a\u4efb\u4f55\u6392\u5e8f\u6216\u8005\u7d22\u5f15\uff0c\u90a3\u4e48\u904d\u5386\u7684\u67e5\u627e\u4e5f\u65e0\u6cd5\u63a5\u53d7\uff0c\u53ea\u80fd\u6298\u4e2d\uff0c\u505a\u4e00\u5b9a\u7a0b\u5ea6\u7684\u6392\u5e8f\u6216\u7d22\u5f15\u3002<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/static.zybuluo.com\/feixuelove1009\/s4ebrxzidymtvu65vudic12o\/image_1b2clkecf3mt1j7a8hn3v5vbrm.png\" class=\"aligncenter\"><\/p>\n<p>\u5206\u5757\u7d22\u5f15\u7684\u6548\u7387\u6bd4\u904d\u5386\u67e5\u627e\u7684O(n)\u8981\u9ad8\u4e00\u4e9b\uff0c\u4f46\u4e0e\u4e8c\u5206\u67e5\u627e\u7684O(logn)\u8fd8\u662f\u8981\u5dee\u4e0d\u5c11\u3002<\/p>\n<p><strong>\u5012\u6392\u7d22\u5f15<\/strong><\/p>\n<p>\u4e0d\u662f\u7531\u8bb0\u5f55\u6765\u786e\u5b9a\u5c5e\u6027\u503c\uff0c\u800c\u662f\u7531\u5c5e\u6027\u503c\u6765\u786e\u5b9a\u8bb0\u5f55\u7684\u4f4d\u7f6e\uff0c\u8fd9\u79cd\u88ab\u79f0\u4e3a\u5012\u6392\u7d22\u5f15\u3002\u5176\u4e2d\u8bb0\u5f55\u53f7\u8868\u5b58\u50a8\u5177\u6709\u76f8\u540c\u6b21\u5173\u952e\u5b57\u7684\u6240\u6709\u8bb0\u5f55\u7684\u5730\u5740\u6216\u5f15\u7528\uff08\u53ef\u4ee5\u662f\u6307\u5411\u8bb0\u5f55\u7684\u6307\u9488\u6216\u8be5\u8bb0\u5f55\u7684\u4e3b\u5173\u952e\u5b57\uff09\u3002<\/p>\n<p>\u5012\u6392\u7d22\u5f15\u662f\u6700\u57fa\u7840\u7684\u641c\u7d22\u5f15\u64ce\u7d22\u5f15\u6280\u672f\u3002<\/p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e00\u3001\u57fa\u672c\u6982\u5ff5 \u67e5\u627e\uff08Searching\uff09\u5c31\u662f\u6839\u636e\u7ed9\u5b9a\u7684\u67d0\u4e2a\u503c\uff0c\u5728\u67e5\u627e\u8868\u4e2d\u786e\u5b9a\u4e00\u4e2a\u5176\u5173\u952e\u5b57\u7b49\u4e8e\u7ed9\u5b9a\u503c\u7684\u6570\u636e\u5143\u7d20\uff08 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