{"id":640,"date":"2020-03-27T00:24:22","date_gmt":"2020-03-26T16:24:22","guid":{"rendered":"http:\/\/www.mustenaka.cn\/?p=640"},"modified":"2020-03-27T00:27:08","modified_gmt":"2020-03-26T16:27:08","slug":"howtocountthenumberof1","status":"publish","type":"post","link":"https:\/\/www.mustenaka.cn\/index.php\/2020\/03\/27\/howtocountthenumberof1\/","title":{"rendered":"\u5982\u4f55\u7edf\u8ba1\u6570\u5b57\u4e2d\u4e8c\u8fdb\u5236\u4e2d\u76841\u7684\u4e2a\u6570"},"content":{"rendered":"<h2>\u5982\u4f55\u7edf\u8ba1\u6570\u5b57\u4e2d\u4e8c\u8fdb\u5236\u4e2d\u76841\u7684\u4e2a\u6570<\/h2>\n<p>\u76f4\u63a5\u8fdb\u884c\u4f4d\u79fb\u662f\u4e0d\u597d\u7684\uff0c\u6bd4\u8f83\u6d6a\u8d39\u65f6\u95f4\uff0c\u5728\u4e25\u683c\u73af\u5883\u4e2d\u4f1a\u8d85\u65f6\u3002<\/p>\n<p>\u4e00\u79cd\u6539\u8fdb\u7684\u601d\u8def\u662f\u5728\u5faa\u73af\u4e2d\u5224\u65adn = n&amp;(n-1)\u53ef\u4ee5\u51cf\u5c11\u65f6\u95f4<\/p>\n<blockquote><p>\u4e00\u4e2a\u6570\u5b575<\/p>\n<p>0101<\/p>\n<p>\u51cf\u53bb1\u5c31\u662f<\/p>\n<p>0100<\/p><\/blockquote>\n<p>\u5c31\u662f\u81ea\u52a8\u53bb\u6389\u6700\u53f3\u8fb9\u4e00\u4f4d\u4e8c\u8fdb\u52361<\/p>\n<p>\u77e5\u9053\u8fd9\u4e2a\u539f\u7406\u8fdb\u800c\u8fdb\u884c\u7edf\u8ba1\u8fdb\u884c\u4e86\u591a\u5c11\u6b21\u76f8\u51cf\u5373\u53ef\uff0c\u6ce8\u610f\u6574\u4e2a\u8fd0\u7b97\u662f\u6309\u7167\u8865\u7801\u8fdb\u884c\u8fd0\u7b97\u7684\u3002<\/p>\n<pre class=\"pure-highlightjs\"><code class=\"\" cpp=\"\">#include&lt;iostream&gt;\r\nusing namespace std;\r\n\r\nint main() {\r\n\tunsigned int ans=0,n;\r\n\tcin&gt;&gt;n;\r\n\twhile(n) {\r\n\t\tn=n&amp;(n-1);\r\n\t\tans++;\r\n\t}\r\n\tcout&lt;&lt;ans&lt;&lt;endl;\r\n\treturn 0;\r\n}<\/code><\/pre>\n<p>\u8ba1\u7b97\u673a\u8ba1\u7b97\u662f\u901a\u8fc7\u5c06<strong>\u539f\u7801<\/strong>\u8f6c\u6362\u4e3a<strong>\u53cd\u7801<\/strong>\u518d\u8f6c\u6362\u4e3a<strong>\u8865\u7801<\/strong>\u800c\u8fdb\u884c\u8ba1\u7b97\u7684\u3002<\/p>\n<p>\u6b64\u65f6\uff08\u4ee58\u4f4d\u5bbd\u4e3a\u4f8b\uff09<\/p>\n<blockquote><p>-1<\/p>\n<p>\u539f\u7801\uff1a1000 0001<\/p>\n<p>\u53cd\u7801\uff1a1111 1110<\/p>\n<p>\u8865\u7801\uff1a1111 1111<\/p><\/blockquote>\n<p>\u6b64\u65f6\u4e0a\u8ff0\u7684\u6c42\u89e3\u65b9\u6cd5\u5c06\u4f1a\u5f97\u5230\u7ed3\u679c\uff1a8\uff0c\u6211\u7684\u8ba1\u7b97\u673a\u4f7f\u7528int\u5b9a\u4e49\u5219\u5f97\u5230\u7ed3\u679c32.<\/p>\n<p>\u5982\u679c\u4f60\u9700\u8981\u6c42\u7684\u8ba1\u7b97\u673a\u8865\u7801\u7684\u4e8c\u8fdb\u52361\u7684\u4f4d\u6570\uff0c\u5373\u53ef\u4e86\uff0c\u5982\u679c\u9700\u8981\u6c42\u7684\u662f\u539f\u7801\u7684\u4e8c\u8fdb\u5236\u4f4d\u6570\uff0c\u90a3\u4e48\u8fd8\u8981\u8fdb\u884c\u5982\u4e0b\u5904\u7406\uff1a<\/p>\n<pre class=\"pure-highlightjs\"><code class=\"\" cpp=\"\">#include&lt;iostream&gt;\r\nusing namespace std;\r\n\r\nint main() {\r\n\tint ans=0,n;\r\n\tcin&gt;&gt;n;\r\n\tif(n&lt;=0) {\r\n\t\tn=(-n);\r\n\t\t\/\/\u770b\u4f60\u9700\u4e0d\u9700\u8981\u5c06\u7b26\u53f7\u4f4d\u8bb0\u4f5c\u4e00\u4e2a\u4e8c\u8fdb\u5236\uff0c\u9700\u8981\u5219ans=1,\u4e0d\u9700\u8981\u5219\u4e3a0\r\n\t\tans=1;\r\n\t}\r\n\twhile(n) {\r\n\t\tn=n&amp;(n-1);\r\n\t\tans++;\r\n\t}\r\n\tcout&lt;&lt;ans&lt;&lt;endl;\r\n\treturn 0;\r\n}<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u5982\u4f55\u7edf\u8ba1\u6570\u5b57\u4e2d\u4e8c\u8fdb\u5236\u4e2d\u76841\u7684\u4e2a\u6570 \u76f4\u63a5\u8fdb\u884c\u4f4d\u79fb\u662f\u4e0d\u597d\u7684\uff0c\u6bd4\u8f83\u6d6a\u8d39\u65f6\u95f4\uff0c\u5728\u4e25\u683c\u73af\u5883\u4e2d\u4f1a\u8d85\u65f6\u3002 \u4e00\u79cd\u6539\u8fdb [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5,32,43],"tags":[33,6],"class_list":["post-640","post","type-post","status-publish","format-standard","hentry","category-algorithm","category-cpp","category-programming-language","tag-c","tag-algorithm"],"views":1896,"_links":{"self":[{"href":"https:\/\/www.mustenaka.cn\/index.php\/wp-json\/wp\/v2\/posts\/640","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.mustenaka.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.mustenaka.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.mustenaka.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.mustenaka.cn\/index.php\/wp-json\/wp\/v2\/comments?post=640"}],"version-history":[{"count":2,"href":"https:\/\/www.mustenaka.cn\/index.php\/wp-json\/wp\/v2\/posts\/640\/revisions"}],"predecessor-version":[{"id":642,"href":"https:\/\/www.mustenaka.cn\/index.php\/wp-json\/wp\/v2\/posts\/640\/revisions\/642"}],"wp:attachment":[{"href":"https:\/\/www.mustenaka.cn\/index.php\/wp-json\/wp\/v2\/media?parent=640"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.mustenaka.cn\/index.php\/wp-json\/wp\/v2\/categories?post=640"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.mustenaka.cn\/index.php\/wp-json\/wp\/v2\/tags?post=640"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}