bzoj 1507: [NOI2003]Editor

 1 #include<cstdio>
 2 #include<iostream>
 3 #include<ext/rope>
 4 using namespace std;
 5 using namespace __gnu_cxx;
 6 crope list;
 7 int n,now;
 8 char ch[10],ch1[3000005];
 9 int main()
10 {
11     scanf("%d",&n);
12     for(int i=1;i<=n;i++)
13       {
14         int a1;
15         scanf("%s",ch);
16         if(ch[0]!=‘P‘&&ch[0]!=‘N‘)
17           scanf("%d",&a1);
18         if(ch[0]==‘M‘)
19           now=a1;
20         if(ch[0]==‘I‘)
21           {
22             for(int i=0;i<a1;i++)
23               {
24                 ch1[i]=getchar();
25                 for(;ch1[i]==‘\n‘;ch1[i]=getchar());
26               }
27             ch1[a1]=0;
28             list.insert(now,ch1);
29            } 
30         if(ch[0]==‘D‘)
31           list.erase(now,a1);
32         if(ch[0]==‘G‘)
33           {
34             list.copy(now,a1,ch1);
35             ch1[a1]=0;
36             printf("%s\n",ch1);
37           }
38         if(ch[0]==‘P‘)
39           now--;
40         if(ch[0]==‘N‘)
41           now++;
42       }
43     return 0;
44 }