{"id":389,"date":"2020-09-26T10:35:47","date_gmt":"2020-09-26T02:35:47","guid":{"rendered":"http:\/\/39.96.58.60\/?p=389"},"modified":"2022-10-18T16:39:35","modified_gmt":"2022-10-18T08:39:35","slug":"leetcode-338-%e6%af%94%e7%89%b9%e4%bd%8d%e8%ae%a1%e6%95%b0","status":"publish","type":"post","link":"http:\/\/www.yatenglg.cn\/blog\/?p=389","title":{"rendered":"Leetcode 338. \u6bd4\u7279\u4f4d\u8ba1\u6570"},"content":{"rendered":"<p>\u7ed9\u5b9a\u4e00\u4e2a\u975e\u8d1f\u6574\u6570&nbsp;<strong>num<\/strong>\u3002\u5bf9\u4e8e&nbsp;<strong>0 \u2264 i \u2264 num <\/strong>\u8303\u56f4\u4e2d\u7684\u6bcf\u4e2a\u6570\u5b57&nbsp;<strong>i&nbsp;<\/strong>\uff0c\u8ba1\u7b97\u5176\u4e8c\u8fdb\u5236\u6570\u4e2d\u7684 1 \u7684\u6570\u76ee\u5e76\u5c06\u5b83\u4eec\u4f5c\u4e3a\u6570\u7ec4\u8fd4\u56de\u3002<\/p>\n<p><strong>\u793a\u4f8b 1:<\/strong><\/p>\n<pre><strong>\u8f93\u5165: <\/strong>2\n\n<strong>\u8f93\u51fa: <\/strong>[0,1,1]<\/pre>\n<p><strong>\u793a\u4f8b&nbsp;2:<\/strong><\/p>\n<pre><strong>\u8f93\u5165: <\/strong>5\n\n<strong>\u8f93\u51fa: <\/strong><code>[0,1,1,2,1,2]<\/code><\/pre>\n<p><strong>\u8fdb\u9636:<\/strong><\/p>\n<ul>\n<li>\u7ed9\u51fa\u65f6\u95f4\u590d\u6742\u5ea6\u4e3a<strong>O(n*sizeof(integer))<\/strong>\u7684\u89e3\u7b54\u975e\u5e38\u5bb9\u6613\u3002\u4f46\u4f60\u53ef\u4ee5\u5728\u7ebf\u6027\u65f6\u95f4<strong>O(n)<\/strong>\u5185\u7528\u4e00\u8d9f\u626b\u63cf\u505a\u5230\u5417\uff1f<\/li>\n<li>\u8981\u6c42\u7b97\u6cd5\u7684\u7a7a\u95f4\u590d\u6742\u5ea6\u4e3a<strong>O(n)<\/strong>\u3002<\/li>\n<li>\u4f60\u80fd\u8fdb\u4e00\u6b65\u5b8c\u5584\u89e3\u6cd5\u5417\uff1f\u8981\u6c42\u5728C++\u6216\u4efb\u4f55\u5176\u4ed6\u8bed\u8a00\u4e2d\u4e0d\u4f7f\u7528\u4efb\u4f55\u5185\u7f6e\u51fd\u6570\uff08\u5982 C++ \u4e2d\u7684&nbsp;<strong>__builtin_popcount<\/strong>\uff09\u6765\u6267\u884c\u6b64\u64cd\u4f5c\u3002<\/li>\n<\/ul>\n<p>**\u96be\u5ea6**: Medium<\/p>\n<p>**\u6807\u7b7e**: \u4f4d\u8fd0\u7b97\u3001 \u52a8\u6001\u89c4\u5212\u3001<\/p>\n<div class=\"hcb_wrap\">\n<pre class=\"prism undefined-numbers lang-python\" data-lang=\"Python\"><code>\n# -*- coding: utf-8 -*-\n# @Author  : LG\n\n\"\"\"\n\u6267\u884c\u7528\u65f6\uff1a88 ms, \u5728\u6240\u6709 Python3 \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e8692.93% \u7684\u7528\u6237\n\u5185\u5b58\u6d88\u8017\uff1a20.6 MB, \u5728\u6240\u6709 Python3 \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e8623.45% \u7684\u7528\u6237\n\n\u89e3\u9898\u601d\u8def\uff1a\n    \u67d0\u4e00\u6570\u503cnum\u7684\u6bd4\u7279\u4f4d\u4e3a1\u7684\u8ba1\u6570\uff0c\u7b49\u4e8e\u5176 \/2\u7684\u4f59\u6570\u4e3a1 \u7684\u6570\u91cf\n    \u4f8b\uff1a\n            13  \u4f59                  6   \u4f59\n        \/2  6   1               \/2  3   0\n        \/2  3   0               \/2  1   1\n        \/2  1   1               \/2  0   1\n        \/2  0   1\n\n\"\"\"\nclass Solution:\n    def countBits(self, num: int) -&gt; List[int]:\n        dp = [0 for _ in range(num+1)]\n        for i in range(1, num+1):\n            dp[i] = dp[i \/\/ 2] if i%2 == 0 else dp[i \/\/ 2]+1\n        return dp<\/code><\/pre>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u7ed9\u5b9a\u4e00\u4e2a\u975e\u8d1f\u6574\u6570&nbsp;num\u3002\u5bf9\u4e8e&nbsp;0 \u2264 i \u2264 num \u8303\u56f4\u4e2d\u7684\u6bcf\u4e2a\u6570\u5b57&nbsp;i&#038;n&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","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\/389"}],"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=389"}],"version-history":[{"count":1,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/389\/revisions"}],"predecessor-version":[{"id":390,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/389\/revisions\/390"}],"wp:attachment":[{"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=389"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=389"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=389"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}