{"id":243,"date":"2012-11-07T16:38:00","date_gmt":"2012-11-07T08:38:00","guid":{"rendered":"http:\/\/nike0good.jp1.rpvhost.net\/148"},"modified":"2012-11-07T16:38:00","modified_gmt":"2012-11-07T08:38:00","slug":"game_long_double_and_fixed","status":"publish","type":"post","link":"https:\/\/nike0good.com\/?p=243","title":{"rendered":"\u6bd4\u8d5b \uff08long double \u4e0efixed)"},"content":{"rendered":"

\u6bd4\u8d5b<\/strong><\/p>\n

 (mat.pas\/c\/cpp)<\/strong><\/p>\n

\u3010\u95ee\u9898\u63cf\u8ff0\u3011<\/strong><\/p>\n

    \u6709\u4e24\u4e2a\u961f\u4f0dA\u548cB\uff0c\u6bcf\u4e2a\u961f\u4f0d\u90fd\u6709n\u4e2a\u4eba\u3002\u8fd9\u4e24\u652f\u961f\u4f0d\u4e4b\u95f4\u8fdb\u884cn\u573a1\u5bf91\u6bd4\u8d5b\uff0c\u6bcf\u4e00\u573a\u90fd\u662f\u7531A\u4e2d\u7684\u4e00\u4e2a\u9009\u624b\u4e0eB\u4e2d\u7684\u4e00\u4e2a\u9009\u624b\u5bf9\u6297\u3002\u540c\u4e00\u4e2a\u4eba\u4e0d\u4f1a\u53c2\u52a0\u591a\u573a\u6bd4\u8d5b\uff0c\u6bcf\u4e2a\u4eba\u7684\u5bf9\u624b\u90fd\u662f\u968f\u673a\u800c\u7b49\u6982\u7387\u7684\u3002\u4f8b\u5982A\u961f\u6709A1\u548cA2\u4e24\u4e2a\u4eba\uff0cB\u961f\u6709B1\u548cB2\u4e24\u4e2a\u4eba\uff0c\u90a3\u4e48(A1 vs B1,A2 vs B2)\u548c(A1 vs B2,A2 vsB1)\u7684\u6982\u7387\u90fd\u662f\u5747\u7b49\u768450%\u3002<\/p>\n

    \u6bcf\u4e2a\u9009\u624b\u90fd\u6709\u4e00\u4e2a\u975e\u8d1f\u7684\u5b9e\u529b值\u3002\u5982\u679c\u5b9e\u529b值\u4e3aX\u548cY\u7684\u9009\u624b\u5bf9\u6297\uff0c\u90a3\u4e48\u5b9e\u529b值\u8f83\u5f3a\u7684\u9009\u624b\u6240\u5728\u7684\u961f\u4f0d\u5c06\u4f1a\u83b7\u5f97(X-Y)^2<\/strong>\u7684\u5f97\u5206\u3002<\/p>\n

    \u6c42A\u7684\u5f97\u5206\u51cfB\u7684\u5f97\u5206\u7684\u671f\u671b值\u3002<\/p>\n

\u3010\u8f93\u5165格\u5f0f\u3011<\/strong><\/p>\n

    \u7b2c\u4e00\u884c\u4e00\u4e2a\u6570n\u8868\u793a\u4e24\u961f\u7684\u4eba\u6570\u4e3an\u3002<\/p>\n

    \u7b2c\u4e8c\u884cn\u4e2a\u6570\uff0c\u7b2ci\u4e2a\u6570A[i]\u8868\u793a\u961f\u4f0dA\u7684\u7b2ci\u4e2a\u4eba\u7684\u5b9e\u529b值\u3002<\/p>\n

    \u7b2c\u4e09\u884cn\u4e2a\u6570\uff0c\u7b2ci\u4e2a\u6570B[i]\u8868\u793a\u961f\u4f0dB\u7684\u7b2ci\u4e2a\u4eba\u7684\u5b9e\u529b值\u3002<\/p>\n

\u3010\u8f93\u51fa格\u5f0f\u3011<\/strong><\/p>\n

    \u8f93\u51fa\u4ec5\u5305\u542b\u4e00\u4e2a\u5b9e\u6570\u8868\u793aA\u671f\u671b\u8d62B\u591a\u5c11\u5206\u3002\u7b54\u6848\u4fdd\u7559\u5230\u5c0f\u6570\u70b9\u540e\u4e00\u4f4d\uff08\u6ce8\u610f\u7cbe\u5ea6\uff09<\/span><\/strong>\u3002<\/p>\n

\u3010\u6837\u4f8b\u8f93\u5165\u3011<\/strong><\/p>\n

    2<\/p>\n

    37<\/p>\n

    15<\/p>\n

\u3010\u6837\u4f8b\u8f93\u51fa\u3011<\/strong><\/p>\n

    20.0<\/p>\n

\u3010\u6570\u636e\u89c4\u6a21\u3011<\/strong><\/p>\n

    \u5bf9\u4e8e30%\u7684\u6570\u636e\uff0cn\u226450\u3002<\/p>\n

    \u5bf9\u4e8e100%\u7684.\u636e,n\u226450000;A[i],B[i]\u226450000\u3002<\/p>\n

 <\/p>\n

\u2211(a[i]-b[i))^2<\/p>\n

\u6ce8\u610f\u540e\u7f00\u6570\u8981\u5728\u6392\u5e8f\u540eT_Y<\/p>\n

\n<\/p>\n

\u53e6\u5916C++\u8981\u7528long double ---\u4f46\u662f\u4e0d\u80fd\u7528.lf\u5360\u4f4d\u7b26<\/p>\n

\n<\/p>\n

\u8981\u7528\u5982\u4e0b\u7684格\u5f0f<\/p>\n

\n<\/p>\n

cout.setf(ios::fixed);\n\tcout.precision(1);\n\n\n\n\tcout<<ans\/n<<endl;<\/pre>\n
\n<\/p>\n
\n<\/p>\n
#include<cstdio>\n#include<cstring>\n#include<cstdlib>\n#include<cmath>\n#include<cctype>\n#include<functional>\n#include<algorithm>\n#include<iostream>\nusing namespace std;\n#define MAXN (50000+10)\nlong long n,a[MAXN],b[MAXN],sumb[MAXN],sumb2[MAXN];\nint main()\n{\n    freopen("mat.in","r",stdin);\n    freopen("mat.out","w",stdout);\n\n    scanf("%d",&n);\n    sumb[0]=sumb2[0]=0;\n    for (int i=1;i<=n;i++)\n    {\n        cin>>a[i];\n\t}\n    sort(a+1,a+1+n);\n\tfor (int i=1;i<=n;i++)\n    {\n        cin>>b[i];\n}\n    sort(b+1,b+1+n);\n\n\tfor (int i=1;i<=n;i++)\n\t{\n\t\tsumb[i]=sumb[i-1]+b[i];\n        sumb2[i]=sumb2[i-1]+b[i]*b[i];\n\t}\n\n\n\tlong double ans=0.0;\n\n\n\tfor (int i=1;i<=n;i++) cout<<sumb[i]<<' ';\n\tcout<<endl;\n\tint r=0;\n    for (int i=1;i<=n;i++)\n    {\n        while (r<n&&a[i]>b[r+1]) r++;\n\n\n        ans+=a[i]*a[i]*(2*r-n);\n        ans+=2*sumb2[r]-sumb2[n];\n\n        ans-=2*a[i]*(2*sumb[r]-sumb[n]);\n\n        \/*\n\t\tlong double tmp=0.0;\n        \/\/cout<<r<<endl;\n\n\t\ttmp+=r*a[i]*a[i]-2*a[i]*sumb[r]+sumb2[r];\n        cout<<tmp<<endl;\n\n\t\ttmp-=(n-r)*a[i]*a[i]-2*a[i]*(sumb[n]-sumb[r])+sumb2[n]-sumb2[r];\n        tmp\/=n;\n\n        ans+=tmp;\n\n\n\/\/\t\tcout<<ans;\n\t*\/\n    }\n\n\/\/\tcout<<ans<<endl;\n\n\tcout.setf(ios::fixed);\n\tcout.precision(1);\n\n\n\n\tcout<<ans\/n<<endl;\n\n\n\n\/\/  while (1);\n    return 0;\n}\n\n<\/pre>\n<\/p>\n
\n<\/p>\n
\n<\/p>\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
\u6bd4\u8d5b  (mat.pas\/c\/cpp) \u3010\u95ee\u9898\u63cf\u8ff0\u3011     \u6709\u4e24\u4e2a\u961f […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":"","footnotes":""},"categories":[3],"tags":[29,30],"class_list":["post-243","post","type-post","status-publish","format-standard","hentry","category-defaultcategory","tag-c","tag-dp"],"yoast_head":"\n\u6bd4\u8d5b \uff08long double \u4e0efixed) - nike0good<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/nike0good.com\/?p=243\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u6bd4\u8d5b \uff08long double \u4e0efixed) - 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