{"id":216,"date":"2012-10-27T16:33:00","date_gmt":"2012-10-27T08:33:00","guid":{"rendered":"http:\/\/nike0good.jp1.rpvhost.net\/121"},"modified":"2012-10-27T16:33:00","modified_gmt":"2012-10-27T08:33:00","slug":"the_flip_sort_sort","status":"publish","type":"post","link":"https:\/\/nike0good.com\/?p=216","title":{"rendered":"\u7ffb\u8f6c\u6392\u5e8f (sort)"},"content":{"rendered":"

\u7ffb\u8f6c\u6392\u5e8f(sort)<\/strong><\/p>\n

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

Alex\u5f97\u5230\u4e86\u5b58\u653e\u7740\u4e00\u4e2a1-n\u6392\u5217\u7684\u5bb9\u5668\u3002\u8fd9\u4e2a\u5bb9\u5668\u652f\u6301\u7684\u552f\u4e00\u64cd\u4f5c\uff0c\u662f\u7ffb\u8f6c\u6392\u5217\u7684\u67d0\u4e00\u6bb5\u3002\u601d\u8003\u5f88\u4e45\u4e4b\u540e\uff0c\u4ed6\u51b3\u5b9a\u7528\u4ee5\u4e0b\u65b9\u5f0f\u8ba9\u8fd9\u4e2a\u6392\u5217\u6709\u5e8f\uff1a<\/p>\n

 <\/p>\n

1 \u627e\u5230\u6bcf\u4e00\u4e2a\u6781\u5927\u7684\u4e0b\u964d\u5b50\u5e8f\u5217\uff08\u5b50\u5e8f\u5217\u8981\u6c42\u8fde\u7eed\uff09<\/p>\n

2 \u5bf9\u4e8e\u6bcf\u4e2a\u957f\u5ea6\u5927\u4e8e1\u7684\u6781\u5927\u4e0b\u964d\u5b50\u5e8f\u5217\uff0c\u5bf9\u5b83\u8fdb\u884c\u7ffb\u8f6c<\/p>\n

3 \u5982\u679c\u6392\u5217\u4f9d\u7136\u4e0d\u662f\u6709\u5e8f\u7684\uff0c\u8f6c1<\/p>\n

 <\/p>\n

\u6211\u4eec\u4e3e\u4e00\u4e2a\u4f8b\u5b50\uff1a\u521d\u59cb\u6392\u5217\u662f(5 3 1 4 2)<\/p>\n

\u4e00\u5f00\u59cb\u6781\u5927\u7684\u4e0b\u964d\u5b50\u5e8f\u5217\u662f(5 3 1)(4 2)<\/p>\n

\u628a\u8fd9\u4e9b\u5e8f\u5217\u7ffb\u8f6c\u540e\u5f97\u52301 3 5 2 4<\/p>\n

\u63a5\u4e0b\u6765\u7684\u6781\u5927\u4e0b\u964d\u5b50\u5e8f\u5217\u662f(1)(3)(5 2)(4)<\/p>\n

\u7ffb\u8f6c\u540e\u662f13 2 5 4<\/p>\n

\u63a5\u4e0b\u6765\u7684\u6781\u5927\u4e0b\u964d\u5b50\u5e8f\u5217\u662f(1)(3 2)(5 4)<\/p>\n

\u7ffb\u8f6c\u540e\u662f12 3 4 5\uff0c\u6ee1\u8db3\u8981\u6c42<\/p>\n

 <\/p>\n

\u5b9a\u4e49\u7ffb\u8f6c\u4e00\u4e2a\u5b50\u5e8f\u5217\u7684\u8d39\u7528\u4e3a1\uff08\u6ce8\u610f\u4e00\u8f6e\u7ffb\u8f6c\u7684\u8d39\u7528\u53ef\u80fd\u5927\u4e8e1\uff09\uff0c\u90a3\u4e48\u4e0a\u9762\u7684\u8d39\u7528\u4e00\u5171\u662f2+1+2=5\u3002<\/p>\n

 <\/p>\n

\u73b0\u5728\uff0c\u7ed9\u4f60\u4e00\u4e2a\u6392\u5217\uff0c\u4f60\u8981\u6c42\u51fa\u5bf9\u8fd9\u4e2a\u6392\u5217\u6392\u5e8f\u7684\u8d39\u7528\u3002<\/p>\n

\u53e6\u5916\u9898\u76ee\u4fdd\u8bc1\uff1a\u7b2c\u4e00\u6b21\u5212\u5206\u65f6\uff0c\u6240\u6709\u6781\u5927\u4e0b\u964d\u5b50\u5e8f\u5217\u7684\u957f\u5ea6\u90fd\u662f\u5076\u6570<\/p>\n

\u8f93\u5165<\/p>\n

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

\u7b2c\u4e8c\u884c\u8868\u793aN\u4e2a\u6570\u7684\u6392\u5217<\/p>\n

\u8f93\u51fa<\/p>\n

\u6240\u9700\u8d39\u7528\u3002\u5982\u679c\u4e0d\u80fd\u6392\u5e8f\uff0c\u8f93\u51fa-1<\/p>\n

 <\/p>\n

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

4<\/p>\n

3 1 4 2<\/p>\n

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

3<\/p>\n

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

\u5bf9\u4e8e10%\u7684\u6570\u636e\uff0cN<=10<\/p>\n

\u5bf9\u4e8e40%\u7684\u6570\u636e\uff0cN<=3000<\/p>\n

\u5bf9\u4e8e100%\u7684\u6570\u636e\uff0cN<=100000<\/p>\n

\n<\/p>\n

\u53ef\u4ee5\u8bc1\u660e\u4e00\u5b9a\u80fd\u6392\u5e8f\uff0c\u5426\u5219\u4e00\u5b9a\u80fd\u8fdb\u884c\u4ea4\u6362\u3002<\/p>\n

\u7531\u4e8e\uff0c\u7b2c\u4e00\u6b21\u5212\u5206\u65f6\uff0c\u6240\u6709\u6781\u5927\u4e0b\u964d\u5b50\u5e8f\u5217\u7684\u957f\u5ea6\u90fd\u662f\u5076\u6570\uff0c\u6ca1\u6709\u5355\u4e2a\u70b9\uff0c\u6545\u4e4b\u540e\u7684\u89e3\u5c3d\u53ef\u80fd\u5728\u9012\u589e\u5e8f\u5217\u63a5\u53e3\uff0c\u957f\u5ea6\u4e0d\u8d85\u8fc72<\/p>\n

<\/h1>\n

(6 5) (2 1) (4 3)<\/h1>\n

 5 (6--1 ) 2--3 4 <\/h1>\n
\u5982\u679c\u6709\u5355\u4e2a\u70b9<\/div>\n
\n<\/div>\n

(7 6 1) 4 (5 3 2)<\/h1>\n

 1 6 (7 4 2) 3 5<\/h1>\n

\n<\/p>\n

\n<\/p>\n

\n<\/p>\n<\/p>\n

\u5e76\u4e14\u7b2c\u4e00\u8f6e\u7ffb\u8f6c\u4e4b\u540e\u4e0d\u4f1a\u6709\u957f\u5ea6>=3\u7684\u6781\u957f\u4e0b\u964d\u5b50\u5e8f\u5217<\/p>\n

\u4e8e\u662f\u95ee\u9898\u53d8\u6210\u4e86\u6c42\u9006\u5e8f\u5bf9\u7684\u4e2a\u6570\uff0c\u5f52\u5e76\u6392\u5e8f\u6216\u8005\u6811\u72b6\u6570\u7ec4\u89e3\u51b3<\/p>\n

<\/p>\n

\n<\/p>\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 (100000+10)\n#define INF (0xfffffff)\nint n,a[MAXN];\nlong long ans=0;\nint le[MAXN],re[MAXN];\nint len(int l,int r)\n{\n\treturn r-l+1;\n}\nvoid mergesort(int l,int r)\n{\n\tif (l>=r) return;\n\tint m=(l+r)>>1;\n\tmergesort(l,m);\n\tmergesort(m+1,r);\n\tmemcpy(le+1,a+l,sizeof(int)*(m-l+1));\n\tmemcpy(re+1,a+m+1,sizeof(int)*(r-m));\n\tle[m-l+2]=re[r-m+1]=INF;\n\tint i=1,j=1;\n\tfor (int k=l;k<=r;k++)\n\t\tif (le[i]<re[j])\n\t\t{\n\t\t\ta[k]=le[i];\n\t\t\ti++;\n\t\t}\n\t\telse\n\t\t{\n\t\t\ta[k]=re[j];\n\t\t\tj++;\n\t\t\tans+=m-l+1-(i-1);\n\t\t}\n}\nint main()\n{\n\tfreopen("sort.in","r",stdin);\n\tfreopen("sort.out","w",stdout);\n\tscanf("%d",&n);\n\tfor (int i=1;i<=n;i++)\n\t{\n\t\tscanf("%d",&a[i]);\n\t}\n\tint h=1;\n\tfor (int i=1;i<n;i++)\n\t{\n\t\tif (a[i]<a[i+1])\n\t\t{\n\t\t\tif (h!=i)\n\t\t\t{\n\t\t\t\tans++;\n\t\t\t\tfor (int j=1;j<=(i-h+1)\/2;j++) swap(a[(i+h)\/2-j+( (i-h)%2  ) ],a[(i+h)\/2+j]);\n\/\/\t\t\t\tfor (int k=1;k<=n;k++) cout<<a[k]<<' ';\n\/\/\t\t\t\tcout<<endl;\n\t\t\t}\n\t\t\th=i+1;\n\t\t}\n\t}\n\tif (h!=n)\n\t{\n\t\tans++;\n\t\tint i=n;\n\t\tfor (int j=1;j<=(i-h+1)\/2;j++) swap(a[(i+h)\/2-j+( (i-h)%2  ) ],a[(i+h)\/2+j]);\n\/\/\t\tfor (int k=1;k<=n;k++) cout<<a[k]<<' ';\n\/\/\t\tcout<<endl;\n\t}\n\n\tmergesort(1,n);\n\n\n\tcout<<ans<<endl;\n\/\/\twhile (1);\n\treturn 0;\n}\n<\/pre><\/p>\n","protected":false},"excerpt":{"rendered":"
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