{"id":631,"date":"2020-09-26T11:05:24","date_gmt":"2020-09-26T03:05:24","guid":{"rendered":"http:\/\/39.96.58.60\/?p=631"},"modified":"2022-10-18T16:38:35","modified_gmt":"2022-10-18T08:38:35","slug":"leetcode-27-%e7%a7%bb%e9%99%a4%e5%85%83%e7%b4%a0","status":"publish","type":"post","link":"http:\/\/www.yatenglg.cn\/blog\/?p=631","title":{"rendered":"Leetcode 27. \u79fb\u9664\u5143\u7d20"},"content":{"rendered":"

\u7ed9\u4f60\u4e00\u4e2a\u6570\u7ec4 nums <\/em>\u548c\u4e00\u4e2a\u503c val<\/em>\uff0c\u4f60\u9700\u8981 \u539f\u5730<\/a><\/strong> \u79fb\u9664\u6240\u6709\u6570\u503c\u7b49\u4e8e val <\/em>\u7684\u5143\u7d20\uff0c\u5e76\u8fd4\u56de\u79fb\u9664\u540e\u6570\u7ec4\u7684\u65b0\u957f\u5ea6\u3002<\/p>\n

\u4e0d\u8981\u4f7f\u7528\u989d\u5916\u7684\u6570\u7ec4\u7a7a\u95f4\uff0c\u4f60\u5fc5\u987b\u4ec5\u4f7f\u7528 O(1) \u989d\u5916\u7a7a\u95f4\u5e76 \u539f\u5730 <\/a>\u4fee\u6539\u8f93\u5165\u6570\u7ec4<\/strong>\u3002<\/p>\n

\u5143\u7d20\u7684\u987a\u5e8f\u53ef\u4ee5\u6539\u53d8\u3002\u4f60\u4e0d\u9700\u8981\u8003\u8651\u6570\u7ec4\u4e2d\u8d85\u51fa\u65b0\u957f\u5ea6\u540e\u9762\u7684\u5143\u7d20\u3002<\/p>\n

 <\/p>\n

\u793a\u4f8b 1:<\/strong><\/p>\n

\u7ed9\u5b9a nums<\/em> = [3,2,2,3]<\/strong>, val<\/em> = 3<\/strong>,\n\n\n\n\u51fd\u6570\u5e94\u8be5\u8fd4\u56de\u65b0\u7684\u957f\u5ea6 2<\/strong>, \u5e76\u4e14 nums <\/em>\u4e2d\u7684\u524d\u4e24\u4e2a\u5143\u7d20\u5747\u4e3a 2<\/strong>\u3002\n\n\n\n\u4f60\u4e0d\u9700\u8981\u8003\u8651\u6570\u7ec4\u4e2d\u8d85\u51fa\u65b0\u957f\u5ea6\u540e\u9762\u7684\u5143\u7d20\u3002\n\n<\/pre>\n
\u793a\u4f8b 2:<\/strong><\/p>\n
\u7ed9\u5b9a nums<\/em> = [0,1,2,2,3,0,4,2]<\/strong>, val<\/em> = 2<\/strong>,\n\n\n\n\u51fd\u6570\u5e94\u8be5\u8fd4\u56de\u65b0\u7684\u957f\u5ea6 5<\/code><\/strong>, \u5e76\u4e14 nums <\/em>\u4e2d\u7684\u524d\u4e94\u4e2a\u5143\u7d20\u4e3a 0<\/code><\/strong>, 1<\/code><\/strong>, 3<\/code><\/strong>, 0<\/code><\/strong>, 4<\/strong>\u3002\n\n\n\n\u6ce8\u610f\u8fd9\u4e94\u4e2a\u5143\u7d20\u53ef\u4e3a\u4efb\u610f\u987a\u5e8f\u3002\n\n\n\n\u4f60\u4e0d\u9700\u8981\u8003\u8651\u6570\u7ec4\u4e2d\u8d85\u51fa\u65b0\u957f\u5ea6\u540e\u9762\u7684\u5143\u7d20\u3002\n\n<\/pre>\n
 <\/p>\n
\u8bf4\u660e:<\/strong><\/p>\n
\u4e3a\u4ec0\u4e48\u8fd4\u56de\u6570\u503c\u662f\u6574\u6570\uff0c\u4f46\u8f93\u51fa\u7684\u7b54\u6848\u662f\u6570\u7ec4\u5462?<\/p>\n
\u8bf7\u6ce8\u610f\uff0c\u8f93\u5165\u6570\u7ec4\u662f\u4ee5\u300c\u5f15\u7528\u300d<\/strong>\u65b9\u5f0f\u4f20\u9012\u7684\uff0c\u8fd9\u610f\u5473\u7740\u5728\u51fd\u6570\u91cc\u4fee\u6539\u8f93\u5165\u6570\u7ec4\u5bf9\u4e8e\u8c03\u7528\u8005\u662f\u53ef\u89c1\u7684\u3002<\/p>\n
\u4f60\u53ef\u4ee5\u60f3\u8c61\u5185\u90e8\u64cd\u4f5c\u5982\u4e0b:<\/p>\n
\/\/ nums<\/strong> \u662f\u4ee5\u201c\u5f15\u7528\u201d\u65b9\u5f0f\u4f20\u9012\u7684\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u4e0d\u5bf9\u5b9e\u53c2\u4f5c\u4efb\u4f55\u62f7\u8d1d\n\nint len = removeElement(nums, val);\n\n\n\n\/\/ \u5728\u51fd\u6570\u91cc\u4fee\u6539\u8f93\u5165\u6570\u7ec4\u5bf9\u4e8e\u8c03\u7528\u8005\u662f\u53ef\u89c1\u7684\u3002\n\n\/\/ \u6839\u636e\u4f60\u7684\u51fd\u6570\u8fd4\u56de\u7684\u957f\u5ea6, \u5b83\u4f1a\u6253\u5370\u51fa\u6570\u7ec4\u4e2d \u8be5\u957f\u5ea6\u8303\u56f4\u5185<\/strong> \u7684\u6240\u6709\u5143\u7d20\u3002\n\nfor (int i = 0; i < len; i++) {\n\n    print(nums[i]);\n\n}\n\n<\/pre>\n
**\u96be\u5ea6**: Easy<\/p>\n
**\u6807\u7b7e**: \u6570\u7ec4\u3001 \u53cc\u6307\u9488\u3001<\/p>\n
\n
\n# -*- coding: utf-8 -*-\n# @Author  : LG\n\n\"\"\"\n\u6267\u884c\u7528\u65f6\uff1a36 ms, \u5728\u6240\u6709 Python3 \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e8688.61% \u7684\u7528\u6237\n\u5185\u5b58\u6d88\u8017\uff1a13.6 MB, \u5728\u6240\u6709 Python3 \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e8682.05% \u7684\u7528\u6237\n\n\u89e3\u9898\u601d\u8def\uff1a\n    \u6839\u636e\u9898\u610f\uff0c\u4e0d\u9700\u8981\u4e3b\u52a8\u5220\u9664\u91cd\u590d\u5143\u7d20\uff0c\u53ea\u9700\u5c06\u4e0d\u91cd\u590d\u5143\u7d20\u524d\u79fb\u5373\u53ef\n\"\"\"\nclass Solution:\n    def removeElement(self, nums: List[int], val: int) -> int:\n        index = 0\n        for i, value in enumerate(nums):\n            if value == val:\n                pass\n            else:\n                nums[index] = value\n                index += 1\n        return index<\/code><\/pre>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
\u7ed9\u4f60\u4e00\u4e2a\u6570\u7ec4 nums \u548c\u4e00\u4e2a\u503c val\uff0c\u4f60\u9700\u8981 \u539f\u5730 \u79fb\u9664\u6240\u6709\u6570\u503c\u7b49\u4e8e val&nbsp…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":[],"categories":[11,1],"tags":[],"_links":{"self":[{"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/631"}],"collection":[{"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=631"}],"version-history":[{"count":1,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/631\/revisions"}],"predecessor-version":[{"id":632,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/631\/revisions\/632"}],"wp:attachment":[{"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=631"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=631"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=631"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}