{"id":223,"date":"2012-10-31T11:03:00","date_gmt":"2012-10-31T03:03:00","guid":{"rendered":"http:\/\/nike0good.jp1.rpvhost.net\/128"},"modified":"2012-10-31T11:03:00","modified_gmt":"2012-10-31T03:03:00","slug":"the_sum_c___pit_father_amplt_amplt_ampgt_ampgt_lld","status":"publish","type":"post","link":"https:\/\/nike0good.com\/?p=223","title":{"rendered":"\u6c42\u548c\u5f0f (C++ \u5751\u7239\u7684<<,>>,%lld)"},"content":{"rendered":"

\u6c42\u548c\u5f0f(x3)<\/strong><\/p>\n

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

\u4f5c\u4e3a\u672c\u573a\u8003\u8bd5\u7684\u7b2c\u4e00\u9898\uff0c\u4f60\u7684\u4efb\u52a1\u5341\u5206\u7b80\u5355\uff1a<\/p>\n

\u7ed9\u5b9a\u957f\u5ea6\u4e3an\u7684\u5e8f\u5217A[i]\uff0c\u6c42\u6240\u6709A[i]xor A[j] (i<j)\u7684值\u4e4b\u548c<\/p>\n

 <\/p>\n

\u8f93\u5165<\/p>\n

\u7b2c\u4e00\u884c\u4e00\u4e2a\u6574\u6570N<\/p>\n

\u63a5\u4e0b\u6765N\u884c\uff0c\u7b2ci\u884c\u4e3aA[i]<\/p>\n

\u8f93\u51fa<\/p>\n

\u6240\u9700\u7684值<\/p>\n

 <\/p>\n

\u6837\u4f8b\u8f93\u5165<\/p>\n

3<\/p>\n

7<\/p>\n

3<\/p>\n

5<\/p>\n

\u6837\u4f8b\u8f93\u51fa<\/p>\n

12<\/p>\n

\u6837\u4f8b\u89e3\u91ca<\/p>\n

7 xor 3+3 xor 5+7 xor 5 = 4+6+2 = 12<\/p>\n

 <\/p>\n

\u6570\u636e\u8303\u56f4<\/p>\n

\u5bf9\u4e8e40%\u7684\u6570\u636e\uff0cN<=5000<\/p>\n

\u5bf9\u4e8e100%\u7684\u6570\u636e\uff0cN<=1000000<\/p>\n

\n<\/p>\n

c++\u4e2d\u7684%lld\u5343\u4e07\u522b\u7528\u554a \uff0c\u5404\u79cd\u5751\u4eba\uff01<\/p>\n

\u7edf\u4e00\u7528cout <\/p>\n

\u53e6\u5916C++\u4e2d(long long)\uff081<<k)<\/p>\n

\u8fd9\u91cc\u8981\u8f6c\uff0c\u4e0d\u7136\u5fc5wa<\/p>\n

\u5343\u4e07\u8981\u5148\u4e58\uff0c\u548c\u522b\u7684\u6570\u4e58\u5b8c\u4e0d\u5b9a\u4ec0\u4e48\u6570\u4e86\u2026\u2026<\/p>\n

\n<\/p>\n

\u672c\u9898\u662f\u4f4d\u8fd0\u7b97\u5206\u89e3\u6210\u4e00\u4f4d\u4e00\u4f4d\u8fd0\u7b97\uff08\u91cd\u8981\u6027\u8d28\uff09<\/p>\n

\n<\/p>\n

\n

#include<cstdio>\n#include<cstdlib>\n#include<cstring>\n#include<cmath>\n#include<iostream>\n#include<functional>\n#include<algorithm>\nusing namespace std;\n#define MAXN (100+10)\nint n,a,c[MAXN][2]={0};\/\/ 1<<i =(0.1)\nint main()\n{\n\tfreopen("x3.in","r",stdin);\n\tfreopen("x3.out","w",stdout);\n\n\/*\tfor (int i=0;i<=100;i++)\n\t{\n\t\tcout<<c[i][0]<<' '<<c[i][1]<<endl;\n\t}\n*\/\tlong long ans=0;\n\tscanf("%d",&n);\n\tint len=0;\n\tfor (int i=1;i<=n;i++)\n\t{\n\t\tscanf("%d",&a);\n\t\tint tot=-1;\n\t\tint j=100;\n\t\twhile (j--) {c[++tot][a%2]++;a\/=2;}\n\n\n\n\t\tlen=len<tot?tot:len;\n\n\t}\n\/*\tfor (int i=0;i<=100;i++)\n\t{\n\t\tcout<<c[i][0]<<' '<<c[i][1]<<endl;\n\t}\n*\/\n\tfor (int i=0;i<=28;i++)\n\t{\n\t\tans+=(long long)(1<<i)*(long long)c[i][1]*(long long)(n-c[i][1]);\n\n\/\/\tcout<<ans<<endl;\n\t}\n\n\n\/*\n\tfor (int i=0;i<=len;i++) cout<<c[i][0]<<' '<<c[i][1]<<' '<<endl;\n*\/\n\n\/\/\tprintf("%lldn",ans);\n\tcout<<ans<<endl;\n\/\/\twhile (1);\n\n\treturn 0;\n}\n<\/pre>\n<\/p>\n


\n<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"
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