http://www.sgi.com/tech/stl/Rope.html

1 BZOJ 1507 [NOI2003] Editor

 1 #include <iostream>
 2 #include <cstdio>
 3 #include <cstring>
 4 #include <cstdlib>
 5 #include <algorithm>
 6 #include <queue>
 7 #include <vector>
 8 #include <stack>
 9 #include <map>
10 #include <set>
11 #include <cmath>
12 #include <cctype>
13 #include <ctime>
14 #include <ext/rope>
15  
16 using namespace std;
17 using namespace __gnu_cxx;
18  
19 #define REP(i, n) for (int i = 0; i < (n); ++i)
20 #define eps 1e-9
21 #define SZ(x) ((int)x.size())
22 #define PI acos(-1.0)
23  
24 typedef long long ll;
25 typedef pair<int, int> pii;
26 const int maxn = 2e6 + 10;
27 crope my_rope;
28 char s[maxn], opt[15];
29 int q, p, n;
30 char c;
31  
32 int main() {
33 #ifdef __AiR_H
34     freopen("in.txt", "r", stdin);
35 //    freopen("out.txt", "w", stdout);
36 #endif // __AiR_H
37     scanf("%d", &q);
38     while (q--) {
39         scanf("%s", opt);
40         if (opt[0] == 'M') { scanf("%d", &p); }
41         else if (opt[0] == 'I') {
42             scanf("%d", &n);
43             for (int i = 0; i < n;) {
44                 c = getchar();
45                 if (32 <= c && c <= 126) { s[i++] = c; }
46             }
47             s[n] = '\0'; my_rope.insert(p, s);
48         } else if (opt[0] == 'D') {
49             scanf("%d", &n); my_rope.erase(p, n);
50         } else if (opt[0] == 'G') {
51             scanf("%d", &n); my_rope.copy(p, n, s);
52             s[n] = '\0'; printf("%s\n", s);
53         } else if (opt[0] == 'P') { --p; }
54         else { ++p; }
55     }
56     return 0;
57 }
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2 BZOJ 1269 [AHOI2006] 文本编辑器editor

 1 #include <iostream>
 2 #include <cstdio>
 3 #include <cstring>
 4 #include <cstdlib>
 5 #include <algorithm>
 6 #include <queue>
 7 #include <vector>
 8 #include <stack>
 9 #include <map>
10 #include <set>
11 #include <cmath>
12 #include <cctype>
13 #include <ctime>
14 #include <ext/rope>
15  
16 using namespace std;
17 using namespace __gnu_cxx;
18  
19 #define REP(i, n) for (int i = 0; i < (n); ++i)
20 #define eps 1e-9
21 #define SZ(x) ((int)x.size())
22 #define PI acos(-1.0)
23  
24 typedef long long ll;
25 typedef pair<int, int> pii;
26 const int maxn = 2e6 + 10;
27 crope rope1, rope2, t;
28 char opt[20], s[maxn];
29 char c;
30 int q, p, n, len;
31  
32 int main() {
33 #ifdef __AiR_H
34     freopen("in.txt", "r", stdin);
35 //    freopen("out.txt", "w", stdout);
36 #endif // __AiR_H
37     scanf("%d", &q);
38     while (q--) {
39         scanf("%s", opt);
40         if (opt[0] == 'M') { scanf("%d", &p); }
41         else if (opt[0] == 'I') {
42             scanf("%d", &n); len = rope1.length();
43             for (int i = 0; i < n;) {
44                 c = getchar();
45                 if (32 <= c && c <= 126) { s[i++] = c; }
46             }
47             s[n] = '\0'; rope1.insert(p, s);
48             reverse(s, s + n); rope2.insert(len - p, s);
49         } else if (opt[0] == 'D') {
50             scanf("%d", &n); len = rope1.length();
51             rope1.erase(p, n); rope2.erase(len - p - n, n);
52         } else if (opt[0] == 'G') { printf("%c\n", rope1[p]); }
53         else if (opt[0] == 'P') { --p; }
54         else if (opt[0] == 'N') { ++p; }
55         else {
56             scanf("%d", &n); len = rope1.length();
57             t = rope1.substr(p, n);
58             rope1 = rope1.substr(0, p) + rope2.substr(len - p - n, n) + rope1.substr(p + n, len - p - n);
59             rope2 = rope2.substr(0, len - p - n) + t + rope2.substr(len - p, p);
60         }
61     }
62     return 0;
63 }
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