{"id":463,"date":"2020-03-09T11:20:06","date_gmt":"2020-03-09T03:20:06","guid":{"rendered":"http:\/\/wangliguang.cn\/?p=9"},"modified":"2020-03-09T11:20:06","modified_gmt":"2020-03-09T03:20:06","slug":"%e6%97%b6%e9%97%b4%e5%a4%8d%e6%9d%82%e5%ba%a6%e4%b8%bao1%e7%9a%84%e6%8a%bd%e6%a0%b7%e7%ae%97%e6%b3%95-alias-sample-method","status":"publish","type":"post","link":"https:\/\/wangliguang.cn\/?p=463","title":{"rendered":"\u65f6\u95f4\u590d\u6742\u5ea6\u4e3aO(1)\u7684\u62bd\u6837\u7b97\u6cd5\u2014\u2014\u522b\u540d\u91c7\u6837\uff08alias sample method\uff09"},"content":{"rendered":"<p>\u3000\u3000\u5f53\u6211\u4eec\u5f97\u5230\u4e00\u4e2a\u6982\u7387\u5206\u5e03\uff0c\u5982\u4f55\u6839\u636e\u8fd9\u4e2a\u6982\u7387\u5206\u5e03\u62bd\u6837\u662f\u4e00\u4e2a\u5e38\u89c1\u7684\u95ee\u9898\u3002\u8fd9\u7bc7\u6587\u7ae0\u5c06\u4ecb\u7ecdalias method\uff08\u522b\u540d\u91c7\u6837\uff09\uff0c\u8fd9\u79cd\u7b97\u6cd5\u7684\u8fd0\u884c\u65f6\u95f4\u590d\u6742\u5ea6\u4e3aO(1)\u7684\uff0c\u5f53\u7136\u63d0\u524d\u9700\u8981\u590d\u6742\u5ea6\u4e3aO(n)\u7684\u9884\u5904\u7406\u3002\u4e0b\u9762\u6211\u5c06\u901a\u8fc7\u4e00\u4e2a\u4f8b\u5b50\u4ecb\u7ecd\u522b\u540d\u91c7\u6837\u7b97\u6cd5\u3002<\/p>\n<h2>\u95ee\u9898\u80cc\u666f<\/h2>\n<p>\u3000\u3000\u5047\u8bbe\u4e00\u5171\u5b58\u5728A\uff0cB\uff0cC\uff0cD\u56db\u79cd\u60c5\u51b5\uff0c\u5b83\u4eec\u7684\u6982\u7387\u5206\u522b\u4e3a 0.3\uff0c0.1\uff0c0.1\uff0c0.5\u3002\u5982\u4f55\u5b9e\u73b0\u6309\u6982\u7387\u62bd\u6837\u5462\uff1f<br \/>\n\u3000\u3000\u6bd4\u8f83\u5e38\u7528\u7684\u4e00\u79cd\u65b9\u6cd5\u662f\u751f\u6210\u4e00\u4e2a\u6570\u7ec4\uff1a1\uff0c2\uff0c2\uff0c3\uff0c3\uff0c3\uff0c4\uff0c4\uff0c4\uff0c4\uff0c\u5176\u4e2d1\u5bf9\u5e94A\uff0c2\u5bf9\u5e94B\uff0c\u4ee5\u6b64\u7c7b\u63a8\u3002\u7136\u540e\u968f\u673a\u5728\u6570\u7ec4\u4e2d\u62bd\u53d6\u4e00\u4e2a\u5373\u53ef\u3002\u8fd9\u79cd\u65b9\u6cd5\u7b80\u5355\u6613\u5b9e\u73b0\uff0c\u4f46\u662f\u8fd9\u662f\u4ec5\u4ec5\u67094\u79cd\u60c5\u51b5\u65f6\u3002\u5f53\u60c5\u51b5\u53d8\u591a\uff0c\u8fd9\u79cd\u65b9\u6cd5\u5c31\u4f1a\u5360\u7528\u5f88\u5927\u7684\u7a7a\u95f4\u4e86\uff0c<strong>\u6240\u4ee5\u5e76\u4e0d\u9002\u7528\u4e8e\u5927\u89c4\u6a21<\/strong>\u7684\u901a\u7528\u60c5\u51b5\u3002<br \/>\n\u3000\u3000\u53e6\u5916\uff0c\u53ef\u4ee5\u6839\u636e\u5b83\u4eec\u7684\u6982\u7387\u5bc6\u5ea6\u5206\u5e03\u751f\u6210\u7d2f\u79ef\u5206\u5e03\uff1a0.3\uff0c0.4\uff0c0.5\uff0c1\u3002\u7136\u540e\u751f\u6210\u4e00\u4e2a0-1\u4e4b\u95f4\u7684\u968f\u673a\u6570\uff0c\u770b\u5b83\u843d\u5728\u54ea\u4e2a\u533a\u95f4\u3002\u7136\u800c\uff0c\u8fd9\u65f6\u9700\u8981\u4e0e\u4e34\u754c\u70b9\u8fdb\u884c\u6bd4\u8f83\u3002\u6211\u4eec\u77e5\u9053\uff0c\u63d2\u5165\u6709\u5e8f\u6570\u5217\u6700\u597d\u7684\u65f6\u95f4\u590d\u6742\u5ea6\u4e3aO(logn)\uff0c\u6240\u4ee5\u8fd9\u79cd\u65b9\u6cd5\u590d\u6742\u5ea6\u8f83\u5927\u3002<br \/>\n\u3000\u3000\u6211\u4eec\u8fd9\u7bc7\u6587\u7ae0\u63d0\u5230\u7684alias method\u53ef\u4ee5<strong>\u5b9e\u73b0\u4ee5\u8fd0\u884c\u590d\u6742\u5ea6\u4e3aO(1)\u7684\u65b9\u5f0f\u62bd\u6837<\/strong>\u3002\u5f53\u7136\u5b83<strong>\u9700\u8981\u9884\u5904\u7406<\/strong>\uff0c<strong>\u9884\u5904\u7406\u7684\u65f6\u95f4\u590d\u6742\u5ea6\u4e3aO(n)<\/strong>,\u4f46\u662f\u91cd\u590d\u8dd1\u7684\u65f6\u5019\uff0c\u8fd0\u884c\u65f6\u95f4\u590d\u6742\u5ea6\u4f4e\u624d\u662f\u91cd\u8981\u7684\u3002<\/p>\n<h2>\u522b\u540d\u91c7\u6837\u7b97\u6cd5<\/h2>\n<p>\u3000\u3000\u4e0b\u9762\u4ecb\u7ecdalias method\u7684\u5904\u7406\u8fc7\u7a0b\u3002<br \/>\n\u3000\u3000\u6211\u4eec\u77e5\u9053\u7b49\u6982\u7387\u5206\u5e03\u62bd\u6837\u7684\u65f6\u95f4\u590d\u6742\u5ea6\u4e3aO(1)\uff0c\u8003\u8651\u4e00\u79cd\u60c5\u51b5\uff0c\u5982\u679cA,B,C,D\u6982\u7387\u5206\u5e03\u5747\u4e3a0.25\uff0c\u90a3\u6211\u4eec\u968f\u673a\u751f\u62101\uff0c2\uff0c3\uff0c4,\u62bd\u4e2d\u54ea\u4e2a\u5c31\u662f\u54ea\u4e2a\uff0c\u590d\u6742\u5ea6\u81ea\u7136\u4e3aO(1)\uff0c<strong>\u8fd9\u662f\u7b49\u6982\u7387\u5206\u5e03\u62bd\u6837\u7684\u60c5\u51b5<\/strong>\u3002<br \/>\n\u3000\u3000\u6211\u4eec\u77e5\u9053\u4e8c\u9879\u4e0d\u7b49\u6982\u7387\u5206\u5e03\u62bd\u6837\u7684\u65f6\u95f4\u590d\u6742\u5ea6\u4e5f\u4e3aO(1)\uff0c\u5982\u679c\u53ea\u6709\u4e24\u4e2a\u53d8\u91cf\uff0c\u6bd4\u5982A,B\u6982\u7387\u5206\u5e03\u4e3a 0.2\uff0c0.8.\u90a3\u6211\u4eec\u7528\u7d2f\u79ef\u5206\u5e03\u7684\u65b9\u6cd5\uff0c\u5c0f\u4e8e0.2\u5c31\u662fA, \u5927\u4e8e\u5c31\u662fB,\u53ea\u9700\u6bd4\u8f83\u4e00\u6b21\uff0c\u6240\u4ee5\u590d\u6742\u5ea6\u4e5f\u662fO(1)\uff0c<strong>\u8fd9\u662f\u4e8c\u9879\u5206\u5e03\u62bd\u6837\u7684\u60c5\u51b5<\/strong>\u3002<br \/>\n\u3000\u3000alias method\u5c31\u662f\u628a<strong>\u8fd9\u4e24\u79cd\u65b9\u6cd5\u7ed3\u5408<\/strong>\u8d77\u6765\u3002<br \/>\n\u3000\u3000\u4ecd\u7136\u4ee5\u672c\u6587\u4e00\u5f00\u59cb\u63d0\u51fa\u7684\u4f8b\u5b50\u4e3a\u4f8b\u3002\u539f\u6765\u7684\u6982\u7387\u5206\u5e03\u5982\u4e0b,\u6211\u4eec\u7528\u7eff\u8272\u4ee3\u8868A\uff0c\u84dd\u8272\u4ee3\u8868B\uff0c\u7d2b\u8272\u4ee3\u8868C\uff0c\u6a59\u8272\u4ee3\u8868D\uff1a<br \/>\n   <img decoding=\"async\" src=\"https:\/\/www.wangliguang.cn\/wp-content\/uploads\/2020\/03\/\u56fe2-3.png\" alt=\"\u539f\u59cb\" \/><br \/>\n   \u9996\u5148\u6211\u4eec\u628a\u539f\u6982\u7387\u5206\u5e03\u4e58\u4ee5N\uff08\u4e3a\u540e\u9762\u7684\u62fc\u63a5\u505a\u51c6\u5907\uff09,\u8fd9\u91cc\u662fN=4\u3002\u5f97\u5230\uff1a1.2\uff0c0.4\uff0c0.4\uff0c2.0\uff0c\u5982\u56fe\u6240\u793a\u3002<br \/>\n  <img decoding=\"async\" src=\"https:\/\/www.wangliguang.cn\/wp-content\/uploads\/2020\/03\/\u56fe1-2.png\" alt=\"\u4e584\u540e\" \/><br \/>\n\u3000\u3000\u6211\u4eec\u628a\u5b83\u62fc\u6210\u7b49\u6982\u7387\u5206\u5e03\u548c\u4e8c\u9879\u4e0d\u7b49\u6982\u7387\u5206\u5e03\uff1a<br \/>\n<img decoding=\"async\" src=\"https:\/\/www.wangliguang.cn\/wp-content\/uploads\/2020\/03\/\u56fe3-4.png\" alt=\"\u5904\u7406\u540e\" \/><br \/>\n\u3000\u3000\u6ce8\u610f\u62fc\u63a5\u7684\u8fc7\u7a0b\u4e2d\uff0c<strong>\u6bcf\u4e00\u5217\u6700\u591a\u6709\u4e24\u79cd\u60c5\u51b5<\/strong>\uff0c\u8fd9\u6837\u624d\u80fd\u8ba9\u6bcf\u4e00\u5217\u90fd\u7b26\u5408\u4e8c\u9879\u5206\u5e03\u3002<br \/>\n\u3000\u3000\u505a\u5b8c\u4ee5\u4e0a\u5904\u7406\u540e\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u5f00\u59cb\u62bd\u6837\u4e86\u3002\u9996\u5148\u6211\u4eec\u4ee5\u7b49\u6982\u7387\u5206\u5e03\u62bd\u4e00\u5217\uff0c\u7136\u540e\u751f\u6210\u4e00\u4e2a0-1\u4e4b\u95f4\u7684\u968f\u673a\u6570\u3002<br \/>\n\u3000\u3000\u4e3e\u4f8b\u6765\u8bf4\uff0c\u4f8b\u5982\u6211\u4eec\u9996\u5148\u62bd\u4e2d\u4e86\u7b2c\u56db\u5217\uff08\u6982\u7387\u4e3a0.25\uff09\u3002\u7136\u540e\u5728\u7b2c\u56db\u5217\u4e2d\u8fdb\u884c\u4e8c\u9879\u5206\u5e03\u62bd\u6837\uff0c\u5982\u679c\u5c0f\u4e8e0.8\uff0c\u7eff\u8272\uff0c\u4ee3\u8868A\uff0c\u53cd\u4e4b\uff0c\u5c31\u662f\u6a59\u8272\uff0c\u4ee3\u8868D\u3002\u8fd9\u4e24\u4e2a\u64cd\u4f5c\u7684\u590d\u6742\u5ea6\u5747\u4e3aO(1)\uff0c\u6545\u603b\u65f6\u95f4\u590d\u6742\u5ea6\u4e5f\u4e3aO(1)\u3002<br \/>\n\u3000\u3000\u90a3\u4e48\u8fd9\u6837\u62bd\u6837\u662f\u6b63\u786e\u7684\u5417\uff1f\u6362\u53e5\u8bdd\u8bf4\uff0c\u5728\u539f\u6982\u7387\u5206\u5e03\u4e2d\u62bd\u5230A\u7684\u6982\u7387\u662f0.3\uff0c\u90a3\u4f7f\u7528alias\u65b9\u6cd5\u62bd\u5230\u7684\u6982\u7387\u8fd8\u662f0.3\u5417\uff1f<br \/>\n\u3000\u3000\u6211\u4eec\u4ecd\u7136\u4ee5\u62bd\u53d6A\u60c5\u51b5\u4e3a\u4f8b\u3002\u539f\u6765\u62bd\u4e2da\u7684\u6982\u7387\u4e3a0.3\u3002\u8fd0\u7528alias method\u65b9\u6cd5\u540e\uff0c\u62bd\u4e2da\u7684\u6982\u7387\u4e3a\u62bd\u4e2d\u7b2c\u4e00\u5217+\u62bd\u4e2d\u7b2c\u56db\u5217\u4e14\u968f\u673a\u6570\u5c0f\u4e8e0.2\uff0c\u7b97\u8d77\u6765\u4e3a0.25+ 0.25 * 0.2\uff09 = 0.3\uff0c\u5b8c\u5168\u4e00\u6837\u3002<\/p>\n<h2>\u53c2\u8003\u6587\u732e<\/h2>\n<p>1\uff0c http:\/\/blog.csdn.net\/sky_zhe\/article\/details\/10051967<br \/>\n2\uff0c https:\/\/www.cnblogs.com\/zqiguoshang\/p\/5885455.html<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u3000\u3000\u5f53\u6211\u4eec\u5f97\u5230\u4e00\u4e2a\u6982\u7387\u5206\u5e03\uff0c\u5982\u4f55\u6839\u636e\u8fd9\u4e2a\u6982\u7387\u5206\u5e03\u62bd\u6837\u662f\u4e00\u4e2a\u5e38\u89c1\u7684\u95ee\u9898\u3002\u8fd9\u7bc7\u6587\u7ae0\u5c06\u4ecb\u7ecdalias method\uff08&hellip; <a href=\"https:\/\/wangliguang.cn\/?p=463\" class=\"more-link\">\u7ee7\u7eed\u9605\u8bfb <span class=\"screen-reader-text\">\u65f6\u95f4\u590d\u6742\u5ea6\u4e3aO(1)\u7684\u62bd\u6837\u7b97\u6cd5\u2014\u2014\u522b\u540d\u91c7\u6837\uff08alias sample method\uff09<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16,21],"tags":[38,43],"class_list":["post-463","post","type-post","status-publish","format-standard","hentry","category-16","category-21","tag-38","tag-43"],"_links":{"self":[{"href":"https:\/\/wangliguang.cn\/index.php?rest_route=\/wp\/v2\/posts\/463","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wangliguang.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wangliguang.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wangliguang.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/wangliguang.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=463"}],"version-history":[{"count":0,"href":"https:\/\/wangliguang.cn\/index.php?rest_route=\/wp\/v2\/posts\/463\/revisions"}],"wp:attachment":[{"href":"https:\/\/wangliguang.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=463"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wangliguang.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=463"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wangliguang.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=463"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}