{"id":2139,"date":"2022-01-19T14:25:28","date_gmt":"2022-01-19T06:25:28","guid":{"rendered":"http:\/\/139.9.1.231\/?p=2139"},"modified":"2022-01-19T14:25:30","modified_gmt":"2022-01-19T06:25:30","slug":"leetcodeday41","status":"publish","type":"post","link":"http:\/\/139.9.1.231\/index.php\/2022\/01\/19\/leetcodeday41\/","title":{"rendered":"leetcodeday41 &#8212; \u7f3a\u5931\u7684\u6b63\u6570"},"content":{"rendered":"\n<p><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p class=\"has-light-pink-background-color has-background\">\u89e3\u6cd5\uff1a\uff08\u53c2\u8003\u4e86\u5b98\u65b9 \u89e3\u6cd5\uff09<\/p>\n\n\n\n<p class=\"has-light-pink-background-color has-background\">1\u3001\u54c8\u5e0c\u8868<\/p>\n\n\n\n<p>\u5bf9\u4e8e\u300c\u524d\u8a00\u300d\u4e2d\u63d0\u5230\u7684\u7b2c\u4e00\u79cd\u505a\u6cd5\uff1a<\/p>\n\n\n\n<blockquote class=\"wp-block-quote\"><p>\u6211\u4eec\u53ef\u4ee5\u5c06\u6570\u7ec4\u6240\u6709\u7684\u6570\u653e\u5165\u54c8\u5e0c\u8868\uff0c\u968f\u540e\u4ece\u00a01\u00a0\u5f00\u59cb\u4f9d\u6b21\u679a\u4e3e\u6b63\u6574\u6570\uff0c\u5e76\u5224\u65ad\u5176\u662f\u5426\u5728\u54c8\u5e0c\u8868\u4e2d\u3002<\/p><\/blockquote>\n\n\n\n<p>\u4ed4\u7ec6\u60f3\u4e00\u60f3\uff0c\u6211\u4eec\u4e3a\u4ec0\u4e48\u8981\u4f7f\u7528\u54c8\u5e0c\u8868\uff1f\u8fd9\u662f\u56e0\u4e3a\u54c8\u5e0c\u8868\u662f\u4e00\u4e2a\u53ef\u4ee5\u652f\u6301\u5feb\u901f\u67e5\u627e\u7684\u6570\u636e\u7ed3\u6784\uff1a\u7ed9\u5b9a\u4e00\u4e2a\u5143\u7d20\uff0c\u6211\u4eec\u53ef\u4ee5\u5728\u00a0<em>O<\/em>(1)\u00a0\u7684\u65f6\u95f4\u67e5\u627e\u8be5\u5143\u7d20\u662f\u5426\u5728\u54c8\u5e0c\u8868\u4e2d\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u53ef\u4ee5\u8003\u8651\u5c06\u7ed9\u5b9a\u7684\u6570\u7ec4\u8bbe\u8ba1\u6210\u54c8\u5e0c\u8868\u7684\u300c\u66ff\u4ee3\u4ea7\u54c1\u300d\u3002<\/p>\n\n\n\n<p>\u5b9e\u9645\u4e0a\uff0c\u5bf9\u4e8e\u4e00\u4e2a\u957f\u5ea6\u4e3a\u00a0<em>N<\/em>\u00a0\u7684\u6570\u7ec4\uff0c\u5176\u4e2d\u6ca1\u6709\u51fa\u73b0\u7684\u6700\u5c0f\u6b63\u6574\u6570\u53ea\u80fd\u5728\u00a0[1,<em>N<\/em>+1]\u00a0\u4e2d\u3002\u8fd9\u662f\u56e0\u4e3a\u5982\u679c\u00a0[1,<em>N<\/em>]\u00a0\u90fd\u51fa\u73b0\u4e86\uff0c\u90a3\u4e48\u7b54\u6848\u662f\u00a0<em>N<\/em>+1\uff0c\u5426\u5219\u7b54\u6848\u662f[1,<em>N<\/em>]\u00a0\u4e2d\u6ca1\u6709\u51fa\u73b0\u7684\u6700\u5c0f\u6b63\u6574\u6570\u3002\u8fd9\u6837\u4e00\u6765\uff0c<strong>\u6211\u4eec\u5c06\u6240\u6709\u5728\u00a0[1,<em>N<\/em>]<\/strong>\u00a0\u8303\u56f4\u5185\u7684\u6570\u653e\u5165\u54c8\u5e0c\u8868\uff0c\u4e5f\u53ef\u4ee5\u5f97\u5230\u6700\u7ec8\u7684\u7b54\u6848\u3002\u800c\u7ed9\u5b9a\u7684\u6570\u7ec4\u6070\u597d\u957f\u5ea6\u4e3a\u00a0<em>N<\/em>\uff0c\u8fd9\u8ba9\u6211\u4eec\u6709\u4e86\u4e00\u79cd\u5c06\u6570\u7ec4\u8bbe\u8ba1\u6210\u54c8\u5e0c\u8868\u7684\u601d\u8def\uff1a<\/p>\n\n\n\n<blockquote class=\"wp-block-quote\"><p>\u6211\u4eec\u5bf9\u6570\u7ec4\u8fdb\u884c\u904d\u5386\uff0c\u5bf9\u4e8e\u904d\u5386\u5230\u7684\u6570\u00a0x<em>x<\/em>\uff0c\u5982\u679c\u5b83\u5728[1,<em>N<\/em>]\u00a0\u7684\u8303\u56f4\u5185\uff0c\u90a3\u4e48\u5c31\u5c06\u6570\u7ec4\u4e2d\u7684\u7b2c\u00a0<em>x<\/em>\u22121\u00a0\u4e2a\u4f4d\u7f6e\uff08\u6ce8\u610f\uff1a\u6570\u7ec4\u4e0b\u6807\u4ece\u00a00\u00a0\u5f00\u59cb\uff09\u6253\u4e0a\u300c\u6807\u8bb0\u300d\u3002\u5728\u904d\u5386\u7ed3\u675f\u4e4b\u540e\uff0c\u5982\u679c\u6240\u6709\u7684\u4f4d\u7f6e\u90fd\u88ab\u6253\u4e0a\u4e86\u6807\u8bb0\uff0c\u90a3\u4e48\u7b54\u6848\u662f\u00a0<em>N<\/em>+1\uff0c\u5426\u5219\u7b54\u6848\u662f\u6700\u5c0f\u7684\u6ca1\u6709\u6253\u4e0a\u6807\u8bb0\u7684\u4f4d\u7f6e\u52a0\u00a01\u3002<\/p><\/blockquote>\n\n\n\n<p>\u90a3\u4e48\u5982\u4f55\u8bbe\u8ba1\u8fd9\u4e2a\u300c\u6807\u8bb0\u300d\u5462\uff1f\u7531\u4e8e\u6570\u7ec4\u4e2d\u7684\u6570\u6ca1\u6709\u4efb\u4f55\u9650\u5236\uff0c\u56e0\u6b64\u8fd9\u5e76\u4e0d\u662f\u4e00\u4ef6\u5bb9\u6613\u7684\u4e8b\u60c5\u3002\u4f46\u6211\u4eec\u53ef\u4ee5\u7ee7\u7eed\u5229\u7528\u4e0a\u9762\u7684\u63d0\u5230\u7684\u6027\u8d28\uff1a\u7531\u4e8e\u6211\u4eec\u53ea\u5728\u610f\u00a0[1,<em>N<\/em>]\u00a0\u4e2d\u7684\u6570\uff0c\u56e0\u6b64\u6211\u4eec\u53ef\u4ee5\u5148\u5bf9\u6570\u7ec4\u8fdb\u884c\u904d\u5386\uff0c\u628a\u4e0d\u5728\u00a0[1,<em>N<\/em>]\u00a0\u8303\u56f4\u5185\u7684\u6570\u4fee\u6539\u6210\u4efb\u610f\u4e00\u4e2a\u5927\u4e8e\u00a0<em>N<\/em>\u00a0\u7684\u6570\uff08\u4f8b\u5982<em>N<\/em>+1\uff09\u3002\u8fd9\u6837\u4e00\u6765\uff0c<strong>\u6570\u7ec4\u4e2d\u7684\u6240\u6709\u6570\u5c31\u90fd\u662f\u6b63\u6570\u4e86<\/strong>\uff0c\u56e0\u6b64\u6211\u4eec\u5c31\u53ef\u4ee5\u5c06\u300c\u6807\u8bb0\u300d\u8868\u793a\u4e3a\u300c\u8d1f\u53f7\u300d\u3002\u7b97\u6cd5\u7684\u6d41\u7a0b\u5982\u4e0b\uff1a<\/p>\n\n\n\n<ul><li>\u6211\u4eec\u5c06\u6570\u7ec4\u4e2d\u6240\u6709\u5c0f\u4e8e\u7b49\u4e8e\u00a00\u00a0\u7684\u6570\u4fee\u6539\u4e3a<em>N<\/em>+1\uff1b<\/li><li>\u6211\u4eec\u904d\u5386\u6570\u7ec4\u4e2d\u7684\u6bcf\u4e00\u4e2a\u6570\u00a0<em>x<\/em>\uff0c\u5b83\u53ef\u80fd\u5df2\u7ecf\u88ab\u6253\u4e86\u6807\u8bb0\uff0c\u56e0\u6b64\u539f\u672c\u5bf9\u5e94\u7684\u6570\u4e3a\u00a0\u2223<em>x<\/em>\u2223\uff0c\u5176\u4e2d\u00a0\u2223\u2223\u00a0\u4e3a\u7edd\u5bf9\u503c\u7b26\u53f7\u3002\u5982\u679c\u00a0|x| in [1, N]\u2223<em>x<\/em>\u2223\u2208[1,<em>N<\/em>]\uff0c\u90a3\u4e48\u6211\u4eec\u7ed9\u6570\u7ec4\u4e2d\u7684\u7b2c\u00a0|x| &#8211; 1\u4e2a\u4f4d\u7f6e\u7684\u6570\u6dfb\u52a0\u4e00\u4e2a\u8d1f\u53f7\u3002\u6ce8\u610f\u5982\u679c\u5b83\u5df2\u7ecf\u6709\u8d1f\u53f7\uff0c\u4e0d\u9700\u8981\u91cd\u590d\u6dfb\u52a0\uff1b<\/li><li>\u5728\u904d\u5386\u5b8c\u6210\u4e4b\u540e\uff0c\u5982\u679c\u6570\u7ec4\u4e2d\u7684\u6bcf\u4e00\u4e2a\u6570\u90fd\u662f\u8d1f\u6570\uff0c\u90a3\u4e48\u7b54\u6848\u662f\u00a0<em>N<\/em>+1\uff0c\u5426\u5219\u7b54\u6848\u662f\u7b2c\u4e00\u4e2a\u6b63\u6570\u7684\u4f4d\u7f6e\u52a0\u00a01\u3002<\/li><\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>def firstMissingPositive(nums):\r\n        lens=len(nums)\r\n        for i in range(lens):\r\n            if nums&#91;i]&lt;0:\r\n                nums&#91;i]=lens+1\r\n\r\n        for i in range(lens):\r\n            num = abs(nums&#91;i])\r\n            if num &lt;= lens:\r\n                nums&#91;num - 1] = -abs(nums&#91;num - 1])\r\n        print(nums)\r\n        for i in range(lens):\r\n            if nums&#91;i]>=0:\r\n                return i+1\r\n        return lens+1 <\/code><\/pre>\n\n\n\n<div class=\"wp-block-image is-style-default\"><figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" src=\"http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-238.png\" alt=\"\" class=\"wp-image-2141\" width=\"580\" height=\"107\" srcset=\"http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-238.png 765w, http:\/\/139.9.1.231\/wp-content\/uploads\/2022\/01\/image-238-300x56.png 300w\" sizes=\"(max-width: 580px) 100vw, 580px\" \/><\/figure><\/div>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u89e3\u6cd5\uff1a\uff08\u53c2\u8003\u4e86\u5b98\u65b9 \u89e3\u6cd5\uff09 1\u3001\u54c8\u5e0c\u8868 \u5bf9\u4e8e\u300c\u524d\u8a00\u300d\u4e2d\u63d0\u5230\u7684\u7b2c\u4e00\u79cd\u505a\u6cd5\uff1a \u6211\u4eec\u53ef\u4ee5\u5c06\u6570\u7ec4\u6240\u6709\u7684\u6570\u653e\u5165\u54c8\u5e0c\u8868\uff0c\u968f &hellip; <a href=\"http:\/\/139.9.1.231\/index.php\/2022\/01\/19\/leetcodeday41\/\" class=\"more-link\">\u7ee7\u7eed\u9605\u8bfb<span class=\"screen-reader-text\">leetcodeday41 &#8212; \u7f3a\u5931\u7684\u6b63\u6570<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[6],"tags":[],"_links":{"self":[{"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/posts\/2139"}],"collection":[{"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/comments?post=2139"}],"version-history":[{"count":2,"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/posts\/2139\/revisions"}],"predecessor-version":[{"id":2142,"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/posts\/2139\/revisions\/2142"}],"wp:attachment":[{"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/media?parent=2139"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/categories?post=2139"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/tags?post=2139"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}