{"id":703,"date":"2020-06-23T15:57:38","date_gmt":"2020-06-23T07:57:38","guid":{"rendered":"http:\/\/www.guanhaobo.cn\/?p=703"},"modified":"2020-06-23T15:57:38","modified_gmt":"2020-06-23T07:57:38","slug":"jz11-%e4%ba%8c%e8%bf%9b%e5%88%b6%e4%b8%ad1%e7%9a%84%e4%b8%aa%e6%95%b0","status":"publish","type":"post","link":"https:\/\/www.guanhaobo.cn\/?p=703","title":{"rendered":"JZ11 \u2014 \u4e8c\u8fdb\u5236\u4e2d1\u7684\u4e2a\u6570"},"content":{"rendered":"

\u9898\u76ee\u63cf\u8ff0<\/h3>\n

\u8f93\u5165\u4e00\u4e2a\u6574\u6570\uff0c\u8f93\u51fa\u8be5\u6570\u4e8c\u8fdb\u5236\u8868\u793a\u4e2d1\u7684\u4e2a\u6570\u3002\u5176\u4e2d\u8d1f\u6570\u7528\u8865\u7801\u8868\u793a\u3002<\/p>\n

\u9898\u76ee\u5206\u6790<\/h3>\n

\u5f88\u591a\u540c\u5b66\u770b\u5230\u8fd9\u4e2a\u95ee\u9898\u7b2c\u4e00\u773c\u60f3\u5230\u7684\u662f\u9664K\u53d6\u4f59\u6cd5<\/code>\u8fdb\u884c\u8fdb\u5236\u8f6c\u6362\u3002\u4f46\u9898\u76ee\u8981\u6c42\u8d1f\u6570\u4f7f\u7528\u8865\u7801\u6765\u8868\u793a\uff0c\u8fd9\u5c31\u9700\u8981\u6211\u4eec\u624b\u52a8\u5c06\u539f\u7801\u8f6c\u6210\u8865\u7801\uff0c\u867d\u7136\u53ef\u4ee5\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0c\u4f46\u5e76\u4e0d\u4f18\u96c5\u3002<\/p>\n

\u539f\u7801\uff1a\u5c06\u4e00\u4e2a\u6574\u6570\uff0c\u8f6c\u6362\u6210\u4e8c\u8fdb\u5236\uff0c\u5c31\u662f\u5176\u539f\u7801\u3002\u5982\u5355\u5b57\u8282\u76845\u7684\u539f\u7801\u4e3a\uff1a0000 0101\uff1b-5\u7684\u539f\u7801\u4e3a1000 0101\u3002\n\u53cd\u7801\uff1a\u6b63\u6570\u7684\u539f\u7801\u53cd\u7801\u8865\u7801\u76f8\u540c\uff1b\u8d1f\u6570\u7684\u53cd\u7801\u662f\u5c06\u539f\u7801\u4e2d\uff0c\u9664\u7b26\u53f7\u4f4d\u4ee5\u5916\uff0c\u6bcf\u4e00\u4f4d\u53d6\u53cd\u3002\u5982\u5355\u5b57\u8282\u76845\u7684\u53cd\u7801\u4e3a\uff1a0000 0101\uff1b-5\u7684\u53cd\u7801\u4e3a1111 1010\u3002\n\u8865\u7801\uff1a\u6b63\u6570\u7684\u539f\u7801\u53cd\u7801\u8865\u7801\u76f8\u540c\uff1b\u8d1f\u6570\u7684\u53cd\u7801\u52a0\u4e00\u5c31\u662f\u8865\u7801\u3002\u5982\u5355\u5b57\u8282\u76845\u7684\u8865\u7801\u4e3a\uff1a0000 0101\uff1b-5\u7684\u539f\u7801\u4e3a1111 1011\u3002\n<\/code><\/pre>\n
\u89e3\u6cd5\u4e00<\/h4>\n
\u5199\u8fc7\u5feb\u901f\u5e42\u7b97\u6cd5\u7684\u540c\u5b66\u5e94\u8be5\u90fd\u77e5\u9053\uff0c\u53ef\u4ee5\u901a\u8fc7\u4f4d\u8fd0\u7b97\u5feb\u901f\u5224\u65ad\u6bcf\u4e00\u4f4d\u662f\u5426\u662f1\u3002\u800c\u8ba1\u7b97\u673a\u4e2d\u6574\u6570\u6070\u597d\u662f\u4f7f\u7528\u8865\u7801\u6765\u5b58\u50a8\u7684\uff0c\u56e0\u6b64\u4e5f\u65e0\u987b\u8003\u8651\u6b63\u8d1f\u6570\u7684\u95ee\u9898\uff0c\u76f4\u63a5\u4f7f\u7528\u4f4d\u8fd0\u7b97\u5373\u53ef\u3002
\n\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
int NumberOf1(int n)\n{\n    int ans = 0;\n    while (n)\n    {\n        if (n & 1)\n            ans++;\n        n >>= 1;\n    }\n    return ans;\n}\n<\/code><\/pre>\n
\u4f46\u8fd9\u79cd\u7ecf\u5178\u5199\u6cd5\u5176\u5b9e\u662f\u5b58\u5728\u95ee\u9898\u7684\u3002
\n\u5bf9\u4e8e\u8d1f\u6570\u6765\u8bf4\uff0c\u7b26\u53f7\u4f4d\u4e3a1\uff0c\u53f3\u79fb\u4e4b\u540e\u7b26\u53f7\u4f4d\u8fd8\u662f1\uff0c\u4f8b\u5982-8>>2<\/code>\u537311111000<\/code>\u53f3\u79fb\u4e24\u4f4d\u540e\u4e3a11111110<\/code>\u3002
\n\u6240\u4ee5\u5f53n\u4e3a\u8d1f\u6570\u65f6\uff0cwhile (n)<\/code>\u8fd9\u4e2a\u5faa\u73af\u6c38\u8fdc\u4e5f\u4e0d\u4f1a\u7ed3\u675f\u3002
\n\u600e\u4e48\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\u5417\uff1f
\n\u6211\u4eec\u53ef\u4ee5\u4e0d\u5bf9n<\/code>\u8fdb\u884c\u4f4d\u79fb\u8fd0\u7b97\uff0c\u800c\u662f\u5bf91<\/code>\u8fdb\u884c\u4f4d\u79fb\u8fd0\u7b97\u3002\u4f8b\u5982n & 1<\/code>\u7528\u6765\u5224\u65ad\u6700\u53f31\u4f4d\u662f\u5426\u4e3a1\uff0cn & 10<\/code>\u7528\u6765\u5224\u65ad\u81ea\u53f3\u5411\u5de6\u7b2c2\u4f4d\u662f\u5426\u4e3a1\u3002
\n\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
int NumberOf1(int n)\n{\n    int ans = 0;\n    int base = 1;\n    while (base)\n    {\n        if (n & base)\n            ans++;\n        base <<= 1;\n    }\n    return ans;\n}\n<\/code><\/pre>\n
\u5047\u8bbeint<\/code>\u662f4\u4e2a\u5b57\u8282\uff0c\u5219base<\/code>\u5728\u4f4d\u79fb32\u6b21\u540e\u4f1a\u53d8\u4e3a0\uff0c\u6b64\u65f6\u4f1a\u9000\u51fa\u5faa\u73af\u3002<\/p>\n
\u89e3\u6cd5\u4e8c<\/h4>\n
\u5728\u4e8c\u8fdb\u5236\u4e2d\uff0c\u6709\u5982\u4e0b\u7ed3\u8bba\uff1a
\n1. n-1<\/code>\u53ef\u4ee5\u4f7fn<\/code>\u4e2d\u6700\u53f3\u76841\u53d8\u4e3a0\uff0c\u4e14\u6b64\u4f4d\u7f6e\u53f3\u8fb9\u5168\u90e8\u75310\u53d8\u4e3a1\uff0c\u4f8b\u5982110100 - 1 = 110011<\/code>\uff1b
\n2. n & (n-1)<\/code>\u53ef\u4ee5\u4f7fn<\/code>\u4e2d\u6700\u53f3\u76841\u53d8\u4e3a0\uff0c\u5176\u4ed6\u4f4d\u7f6e\u4e0d\u53d8\uff0c\u4f8b\u5982110100 & (110100 - 1) = 110100 & 110011 = 110000<\/code><\/p>\n
\u5373\u6bcf\u6267\u884c\u4e00\u6b21n = n & (n-1)<\/code>\uff0cn\u5c31\u4f1a\u5c11\u4e00\u4e2a1\uff0c\u76f4\u5230n\u5168\u90e8\u4e3a0
\n\u56e0\u6b64\u6709\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
int NumberOf1(int n)\n{\n    int ans = 0;\n    while (n)\n    {\n        n &= n - 1;\n        ans++;\n    }\n    return ans;\n}\n<\/code><\/pre>\n
\u5faa\u73af\u6267\u884c\u6b21\u6570\u5c31\u662f\u7b54\u6848\u7684\u6b21\u6570\u3002<\/p>\n
C++<\/h3>\n
class Solution\n{\npublic:\n    int NumberOf1(int n)\n    {\n        int ans = 0;\n        int base = 1;\n        while (base)\n        {\n            if (n & base)\n                ans++;\n            base <<= 1;\n        }\n        return ans;\n    }\n};\n<\/code><\/pre>\n
Java<\/h3>\n
public class Solution {\n    public int NumberOf1(int n) {\n        int ans = 0;\n        while (n != 0) {\n            n &= n - 1;\n            ans++;\n        }\n        return ans;\n    }\n}\n<\/code><\/pre>\n
What`s more<\/h4>\n
\u5728\u89e3\u6cd5\u4e00\u4e2d\u6211\u4eec\u8bf4\u8fc7\uff0c\u7ecf\u5178\u7684\u5411\u53f3\u4f4d\u79fb\u64cd\u4f5c\uff0c\u5bf9\u4e8e\u8d1f\u6570\u6765\u8bf4\u662f\u9519\u8bef\u7684\uff0c\u56e0\u4e3a\u8d1f\u6570\u5728\u53f3\u79fb\u7684\u65f6\u5019\u9ad8\u4f4d\u4f1a\u81ea\u52a8\u8865\u4e3a1.
\n\u5728Java\u4e2d\u9664\u4e86\u666e\u901a\u7684\u4f4d\u79fb\u64cd\u4f5c>><\/code>\u548c<<<\/code>\uff0c\u8fd8\u6709\u4e00\u79cd\u65e0\u7b26\u53f7\u53f3\u79fb\u64cd\u4f5c>>><\/code>\uff0c\u5bf9\u8d1f\u6570\u8fdb\u884c\u65e0\u7b26\u53f7\u4f4d\u79fb\u5c31\u4e0d\u4f1a\u81ea\u52a8\u5728\u9ad8\u4f4d\u88651\u4e86\u3002\uff08Java\u6ca1\u6709\u65e0\u7b26\u53f7\u5de6\u79fb\u64cd\u4f5c\uff0c\u56e0\u4e3a\u548c\u666e\u901a\u5de6\u79fb\u6ca1\u533a\u522b\uff09
\n\u56e0\u6b64\uff0c\u5982\u679c\u4f7f\u7528Java\u8bed\u8a00\uff0c\u53ea\u8981\u5c06>><\/code>\u6539\u4e3a>>><\/code>\uff0c\u4f7f\u7528\u89e3\u6cd5\u4e00\u4e2d\u7ed9\u51fa\u7684\u7b2c\u4e00\u79cd\u4ee3\u7801\u4e5f\u662fOK\u7684\u3002<\/p>\n
class Solution {\n    public int NumberOf1(int n) {\n        int ans = 0;\n        while (n != 0) {\n            if ((n & 1) == 1)\n                ans++;\n            n >>>= 1;\n        }\n        return ans;\n    }\n}\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
\u9898\u76ee\u63cf\u8ff0 \u8f93\u5165\u4e00\u4e2a\u6574\u6570\uff0c\u8f93\u51fa\u8be5\u6570\u4e8c\u8fdb\u5236\u8868\u793a\u4e2d1\u7684\u4e2a\u6570\u3002\u5176\u4e2d\u8d1f\u6570\u7528\u8865\u7801\u8868\u793a\u3002 \u9898\u76ee\u5206\u6790 \u5f88\u591a\u540c\u5b66\u770b\u5230\u8fd9\u4e2a\u95ee\u9898\u7b2c\u4e00 […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[36,39],"class_list":["post-703","post","type-post","status-publish","format-standard","hentry","category-algo","tag-36","tag-offer"],"_links":{"self":[{"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=\/wp\/v2\/posts\/703","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=703"}],"version-history":[{"count":0,"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=\/wp\/v2\/posts\/703\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=703"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=703"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=703"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}