{"id":7374,"date":"2023-04-10T21:11:51","date_gmt":"2023-04-10T13:11:51","guid":{"rendered":"https:\/\/www.5x44.cn\/?p=7374"},"modified":"2023-04-10T21:12:30","modified_gmt":"2023-04-10T13:12:30","slug":"lambda%e7%a1%ae%e5%ae%9e%e5%a5%bd%e7%94%a8","status":"publish","type":"post","link":"https:\/\/www.5x44.cn\/?p=7374","title":{"rendered":"lambda\u786e\u5b9e\u597d\u7528"},"content":{"rendered":"\n<p>\u9898\u76ee\u8981\u6c42\uff1a<\/p>\n\n\n\n<p>\u5c06\u4e00\u4e2a\u957f\u5ea6\u4e3an\uff081&lt;=n&lt;=10<sup>4<\/sup>\uff09\u7684\u5b57\u7b26\u4e32\u5206\u6210n\/k\u4efd\u5b50\u5b57\u7b26\u4e32\uff0ck\u4e3a\u6bcf\u4e2a\u5b50\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\uff081&lt;=k&lt;=n\uff09\u3002\u6bcf\u4e2a\u5b50\u5b57\u7b26\u4e32\u4e2d\u4e0d\u80fd\u6709\u91cd\u590d\u7684\u5b57\u7b26\uff0c\u5e76\u4e14\u5b50\u5b57\u7b26\u4e32\u4e2d\u7684\u5b57\u7b26\u987a\u5e8f\u8981\u548c\u539f\u59cb\u5b57\u7b26\u4e32\u76f8\u540c\uff08\u4ee5\u5148\u51fa\u73b0\u7684\u5b57\u7b26\u4e3a\u51c6\uff0c\u4e5f\u5c31\u662fABCAB-&gt;ABC\uff09\u3002<\/p>\n\n\n\n<p>\u6211\u7684\u89e3\u9898\u601d\u8def\uff1a\uff081\uff09\u5206\u5272\u5b57\u7b26\u4e32\u5e76\u4e0d\u662f\u95ee\u9898\uff0c\u53ef\u4ee5\u7528\u5207\u7247\u5b8c\u6210\u3002\uff082\uff09\u5b50\u4e32\u53bb\u91cd\uff0c\u6211\u7684\u60f3\u6cd5\u662f\u628a\u5b50\u4e32\u53d8\u6210set\u7c7b\u578b\uff0c\u56e0\u4e3aset\u7c7b\u578b\u662f\u65e0\u5e8f\u65e0\u91cd\u590d\u7684\u3002\u7136\u540e\u4f9d\u6b21\u67e5\u627e\u65e0\u5e8f\u65e0\u91cd\u590d\u5b50\u4e32\u4e2d\u6bcf\u4e2a\u5b57\u6bcd\u5728\u6d88\u9664\u91cd\u590d\u4e4b\u524d\u7684\u5b50\u7b26\u4e32\u4e2d\u51fa\u73b0\u7684\u4f4d\u7f6e\uff0c\u5e76\u8bb0\u5f55\uff0c\u6700\u540e\u518d\u6392\u5e8f\u4e00\u4e0b\uff0c\u5c31\u53ef\u4ee5\u4e86\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>from math import ceil\n\ndef split_tool(s:str):\n#\u628a\u5b57\u7b26\u4e32\u53d8\u6210\u5b57\u5178\u7684\u539f\u56e0\u662f\uff0c\u8981\u8bb0\u5f55\u6bcf\u4e2a\u5b57\u6bcd\u5728\u539f\u59cb\u5b57\u7b26\u4e32\u4e2d\u51fa\u73b0\u7684\u4f4d\u7f6e\u3002key\u7528\u7684\u662f\u8981\u8bb0\u5f55\u7684\u5b57\u7b26\uff0cvalue\u4fdd\u5b58\u4f4d\u7f6e\u4fe1\u606f\uff0c\u73b0\u5728\u7684\u503c\u662fNone\u3002\n    final_unordered_chr=dict.fromkeys(set(s))\n#find\u8fd4\u56de\u539f\u59cb\u5b50\u4e32\u4e2d\u7b2c\u4e00\u6b21\u51fa\u73b0\u5f53\u524d\u5b57\u7b26\u7684\u4f4d\u7f6e\uff0c\u4fdd\u5b58\u5230\u5b57\u5178\u7684\u76f8\u5e94\u4f4d\u7f6e\u3002\n    for i in final_unordered_chr.keys():\n        final_unordered_chr&#91;i]=s.find(i)\n    return ''.join(<mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-amber-color\">map(lambda x:x&#91;0]<\/mark>, <mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">sorted(<\/mark><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-light-green-cyan-color\">final_unordered_chr.items()<\/mark><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">,key=lambda x:x&#91;1])<\/mark><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-amber-color\">)<\/mark>)\n#\u6700\u540e\u7684return\u7531join\u3001map\u3001sorted\u4e09\u4e2a\u51fd\u6570\u7ec4\u6210\uff0csorted\u5c06\u65e0\u5e8f\u65e0\u91cd\u590d\u7684\u5b57\u7b26\u6392\u5e8f\u5b83\u8fd4\u56de\u7684\u662f\u4e00\u4e2a\u6392\u597d\u5e8f\u7684\u961f\u5217\uff08\u961f\u5217\u7684\u5143\u7d20\u662f\u5143\u7ec4\uff0c\u6bcf\u4e2a\u5143\u7ec4\u6709\u4e24\u4e2a\u503c\uff0c\u4e00\u4e2a\u662f\u6211\u4eec\u9700\u8981\u8fd4\u56de\u7684\u5b57\u7b26\uff0c\u53e6\u4e00\u4e2a\u662f\u5b83\u7684\u4f4d\u7f6e\u4fe1\u606f\uff0c\u6240\u4ee5lambda\u8981\u8fd4\u56dex&#91;1]\uff09\uff0cmap\u7684\u4f5c\u7528\u662f\u628a\u961f\u5217\u91cc\u7684\u5143\u7ec4\u53bb\u6389\uff0c\u53d8\u6210\u4e00\u4e2a\u53ea\u6709\u6211\u4eec\u9700\u8981\u5b57\u7b26\u7684\u961f\u5217\uff0cjoin\u7684\u53c2\u6570\u9700\u8981\u4e00\u4e2a\u53ef\u8fed\u4ee3\u7684\u5143\u7d20\uff0c\u7136\u540e\u5c06\u5176\u94fe\u63a5\u6210\u5b57\u7b26\u4e32\u3002<\/code><\/pre>\n\n\n\n<p>\u5982\u679c\u6709\u66f4\u597d\u7684\u65b9\u6cd5\u53ef\u4ee5\u7ed9\u6211\u90ae\u4ef6qowoq@msn.com<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u9898\u76ee\u8981\u6c42\uff1a \u5c06\u4e00\u4e2a\u957f\u5ea6\u4e3an\uff081&lt;=n&lt;=104\uff09\u7684\u5b57\u7b26\u4e32\u5206\u6210n\/k\u4efd\u5b50\u5b57\u7b26\u4e32\uff0ck\u4e3a\u6bcf\u4e2a\u5b50\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\uff081&lt;=k&lt;=n\uff09\u3002\u6bcf\u4e2a\u5b50\u5b57\u7b26\u4e32\u4e2d\u4e0d&#8230;<\/p>\n<p class=\"read-more\"><a class=\"btn btn-default\" href=\"https:\/\/www.5x44.cn\/?p=7374\"> Read More<span class=\"screen-reader-text\">  Read More<\/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":[15],"tags":[],"class_list":["post-7374","post","type-post","status-publish","format-standard","hentry","category-python3"],"_links":{"self":[{"href":"https:\/\/www.5x44.cn\/index.php?rest_route=\/wp\/v2\/posts\/7374","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.5x44.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.5x44.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.5x44.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.5x44.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7374"}],"version-history":[{"count":2,"href":"https:\/\/www.5x44.cn\/index.php?rest_route=\/wp\/v2\/posts\/7374\/revisions"}],"predecessor-version":[{"id":7376,"href":"https:\/\/www.5x44.cn\/index.php?rest_route=\/wp\/v2\/posts\/7374\/revisions\/7376"}],"wp:attachment":[{"href":"https:\/\/www.5x44.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7374"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.5x44.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7374"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.5x44.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7374"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}