Splay模板

  1 //poj3580
  2 //#pragma comment(linker,"/STACK:102400000,102400000")
  3 #include <cstdio>
  4 #include <set>
  5 #include <map>
  6 #include <ctime>
  7 #include <cctype>
  8 #include <string>
  9 #include <cstring>
 10 #include <cstdlib>
 11 #include <cmath>
 12 #include <assert.h>
 13 #include <algorithm>
 14 #include <iostream>
 15 #include <climits>
 16 #include <queue>
 17 #include <vector>
 18 
 19 #define dte(x) cout << #x << " = " << x << endl;
 20 #define scaf2(x,y) scaf(x);scaf(y);
 21 #define mkp make_pair
 22   
 23 using namespace std;
 24 template<typename T>inline void scaf(T&v)
 25 {
 26     char ch = getchar();
 27     for(; ch < '0' || ch > '9'; ch = getchar());
 28     for(v = 0; ch >= '0' && ch <= '9'; ch = getchar()) v = (v << 1) +(v << 3) + ch - '0';
 29 }
 30 typedef long long LL;
 31 typedef unsigned long long ULL;
 32 typedef pair <int, int> PII;
 33 const int maxN = 2e5 + 10;
 34 const LL mod = 1e9 + 7;
 35 const double eps = 1e-9;
 36 const LL oo = ~ 0U >> 2;
 37 
 38 int inn[maxN];
 39 
 40 struct SplayTree
 41 {
 42     static const int smaxN = 4e5 + 10;
 43     #define keyNode chird[chird[root][1]][0]
 44     int item[smaxN];
 45     int parent[smaxN];
 46     int sz[smaxN];
 47     int chird[smaxN][2];
 48     
 49     int root, vtot;
 50     
 51     SplayTree()
 52     {
 53         root = vtot = 0;
 54         item[0] = -1;
 55         parent[0] = sz[0] = chird[0][0] = chird[0][1] = 0;
 56     }
 57     
 58     void Rotate(const int& x, const int& lr)
 59     {//lr - > 0: leftRotate 1: rightRotate
 60         int y = parent[x];
 61         pushDown(y); pushDown(x);
 62         chird[y][! lr] = chird[x][lr];
 63         if (chird[x][lr]) parent[chird[x][lr]] = y;
 64         parent[x] = parent[y];
 65         if (parent[y])
 66         {
 67             if (chird[parent[y]][0] == y) chird[parent[y]][0] = x;
 68             else chird[parent[y]][1] = x;
 69         }
 70         chird[x][lr] = y; parent[y] = x;
 71         pushUp(y);
 72     }
 73     
 74     void Splay(int x, const int& target)
 75     {//Splay x to target't chird -- target must be x's ancestor
 76         for (pushDown(x); parent[x] != target;)
 77         {
 78             if (parent[parent[x]] == target)/*x's father's father is target -> rotate x to x's father*/
 79             {
 80                 if (chird[parent[x]][0] == x) Rotate(x, 1);
 81                 else Rotate(x, 0);
 82             }else
 83             {
 84                 int y = parent[x], z = parent[parent[x]];
 85                 if (chird[z][0] == y)/*y is z's lson*/
 86                 {
 87                     if (chird[y][0] == x) Rotate(y, 1), Rotate(x, 1);//yi zi xing
 88                     else Rotate(x, 0), Rotate(x, 1);//zhi zi xing
 89                 }else
 90                 {
 91                     if (chird[y][0] == x) Rotate(x, 1), Rotate(x, 0);//zhi
 92                     else Rotate(y, 0), Rotate(x, 0);//yi
 93                 }
 94             }
 95         }
 96         pushUp(x);
 97         if (!target) root = x;
 98     }
 99     
100     int Search(const int& target)
101     {
102         int x = root;
103         while (x)
104         {
105             if (item[x] == target) break;
106             if (item[x] > target) x = chird[x][0];
107             else x = chird[x][1];
108         }
109         if (x) Splay(x, 0);
110         return x;
111     }
112     
113     void Insert(const int& target, const int& _id)
114     {
115 //        if (Search(target)) return;//exist?
116         int x = root, y = 0, lr;
117         while (x)
118         {
119             y = x; ++ sz[y];
120             if (item[x] > target) x = chird[x][0];
121             else x = chird[x][1];
122         }
123         if (item[y] > target) lr = 0;
124         else lr = 1;
125         sz[x = ++ vtot] = 1;
126         parent[x] = y; chird[y][lr] = x;
127         item[x] = target;
128         chird[x][0] = chird[x][1] = 0;
129         Splay(x, 0);
130     }
131     
132     void Delete(const int& target)
133     {
134         int x = Search(target);
135         if (!x) return;//no exist
136         int lc = chird[x][0], rc = chird[x][1];
137         sz[x] = parent[lc] = parent[rc] = chird[x][0] = chird[x][1] = 0;
138         if (!lc) root = rc;
139         else
140         {
141             for (pushDown(lc); chird[lc][1]; pushDown(lc)) lc = chird[lc][1];
142             Splay(lc, 0);
143             parent[rc] = lc;
144             chird[lc][1] = rc;
145             pushUp(root);
146         }
147     }
148     
149     int findParent(const int& target)
150     {
151         int x = root, ret = 0;
152         while (x)
153         {
154             if (target <= item[x]) x = chird[x][0];
155             else ret = x, x = chird[x][1];
156         }
157         if (ret) Splay(ret, 0);
158         return ret;
159     }
160     
161     int findSuccessor(const int& target)
162     {
163         int x = root, ret = 0;
164         while (x)
165         {
166             if (target >= item[x]) x = chird[x][1];
167             else ret = x, x = chird[x][0];
168         }
169         if (ret) Splay(ret, 0);
170         return ret;
171     }
172     
173     int findKth(int k, const int& target)
174     {
175         int x = root;
176         while (x)
177         {
178             pushDown(x);
179              int y = sz[chird[x][0]];
180             if (y == k) break;
181             if (y > k) x = chird[x][0];
182             else x = chird[x][1], k -= y + 1;
183         }
184         if (x) Splay(x, target);
185         return x;//item[x]???
186     }
187     
188     void Treaval(const int& x, int& num)
189     {
190         if (x)
191         {
192             pushDown(x);
193             Treaval(chird[x][0], num);
194             printf("%d", item[x]);
195             if (-- num) putchar(32);
196             else putchar(10);
197             Treaval(chird[x][1], num);
198         }
199     }
200     
201     void outPut(int n)
202     {
203         int m = n;
204         findKth(0, 0);
205         Treaval(root, m);
206     }
207     
208     void newNode(int& x, const int& val, const int& father)
209     {
210         item[x = ++ vtot] = val; sz[x] = 1; parent[x] = father; 
211         minVal[x] = val; rev[x] = false; addLazy[x] = 0;
212         chird[x][0] = chird[x][1] = 0;
213     }
214     
215     void buildSplay(int n)
216     {
217         root = vtot = 0;
218         item[0] = 0; rev[0] = 0; addLazy[0] = 0; minVal[0] = oo;
219         parent[0] = sz[0] = chird[0][0] = chird[0][1] = 0;
220         newNode(root, oo, 0);//ex node?
221         newNode(chird[root][1], oo, root);
222         buildTree(keyNode, 1, n, chird[root][1]);
223         pushUp(chird[root][1]);
224         pushUp(root);
225     }
226     
227     void buildTree(int& x, const int& l, const int& r, const int& father)
228     {
229         if (l > r) return;
230         int mid = l + r >> 1;
231         newNode(x, inn[mid], father);
232         buildTree(chird[x][0], l, mid - 1, x);
233         buildTree(chird[x][1], mid + 1, r, x);
234         pushUp(x);
235     }
236     
237     void pushUp(const int& x)
238     {
239         sz[x] = sz[chird[x][0]] + sz[chird[x][1]] + 1;
240         minVal[x] = item[x];
241         if (chird[x][0]) minVal[x] = min(minVal[x], minVal[chird[x][0]]);
242         if (chird[x][1]) minVal[x] = min(minVal[x], minVal[chird[x][1]]);;
243     }
244     
245     void pushDown(const int& x)
246     {
247         if (rev[x])
248         {
249             int lc = chird[x][0], rc = chird[x][1];
250             swap(chird[x][0], chird[x][1]);
251             if (lc) rev[lc] ^= 1;
252             if (rc) rev[rc] ^= 1;
253             rev[x] ^= 1;
254         }
255         if (addLazy[x])
256         {
257             if (chird[x][0])
258             {
259                 item[chird[x][0]] += addLazy[x];
260                 minVal[chird[x][0]] += addLazy[x];
261                 addLazy[chird[x][0]] += addLazy[x];
262             }
263             if (chird[x][1])
264             {
265                 item[chird[x][1]] += addLazy[x];
266                 minVal[chird[x][1]] += addLazy[x];
267                 addLazy[chird[x][1]] += addLazy[x];
268             }
269             addLazy[x] = 0;
270         }
271     }
272     
273     void add(const int& l, const int& r, const int& v)
274     {
275         findKth(l - 1, 0); findKth(r + 1, root);
276         item[keyNode] += v;
277         addLazy[keyNode] += v;
278         minVal[keyNode] += v;
279         Splay(keyNode, 0);
280     }
281     
282     void insVal(const int& l, const int& v)
283     {
284         findKth(l, 0); findKth(l + 1, root);
285         if (keyNode) while (1);
286         newNode(keyNode, v, chird[root][1]);
287         Splay(keyNode, 0);
288     }
289     
290     void del(const int& target)
291     {
292         findKth(target, 0);
293         pushDown(root);
294         int x = root;
295         int lc = chird[x][0], rc = chird[x][1];
296         sz[x] = parent[lc] = parent[rc] = chird[x][0] = chird[x][1] = 0;
297         if (!lc) root = rc;
298         else
299         {
300             for (pushDown(lc); chird[lc][1]; pushDown(lc)) lc = chird[lc][1];
301             Splay(lc, 0);
302             parent[rc] = lc;
303             chird[lc][1] = rc;
304             pushUp(root);
305         }
306     }
307     
308     int getMin(const int& l, const int& r)
309     {
310         findKth(l - 1, 0); findKth(r + 1, root);
311         return minVal[keyNode];
312     }
313     
314     void Reverse(const int& l, const int& r)
315     {
316         findKth(l - 1, 0); findKth(r + 1, root);
317         rev[keyNode] ^= 1;
318         Splay(keyNode, 0);
319     }
320     
321     void Revolve(const int& l, const int& r, const int& v)
322     {
323         int rr = r - v;
324         int ll = rr + 1;
325         findKth(ll - 1, 0); findKth(r + 1, root);
326         int x = keyNode; keyNode = 0; parent[x] = 0;
327         pushUp(chird[root][1]); pushUp(root);
328         findKth(l - 1, 0); findKth(l, root);
329         keyNode = x;
330         parent[keyNode] = chird[root][1];
331         pushUp(chird[root][1]); pushUp(root);
332         Splay(keyNode, 0);
333     }
334     
335     int minVal[smaxN];
336     int addLazy[smaxN];
337     bool rev[smaxN];
338 }spt;
339 
340 int main()
341 {
342 //    freopen("ok.out", "w", stdout);
343     int n, i, m;
344     int l, r, v;
345     char opt[10];
346 //    scaf(n);
347     scanf("%d", &n);
348     for (i = 1; i <= n; ++ i)
349 //        scaf(inn[i]);
350         scanf("%d", &inn[i]);
351     spt.buildSplay(n);
352 //    scaf(m);
353     scanf("%d", &m);
354     while (m --)
355     {
356         scanf("%s", opt);
357 //        printf("%s
", opt);
358         if ('A' == opt[0])
359         {
360 //            scaf2(l, r); scaf(v);
361             scanf("%d%d%d", &l, &r, &v);
362             spt.add(l, r, v);
363         }else if ('I' == opt[0])
364         {
365 //            scaf2(l, v);
366             scanf("%d%d", &l, &v);
367             spt.insVal(l, v);
368         }else if ('D' == opt[0])
369         {
370 //            scaf(v);
371             scanf("%d", &v);
372              spt.del(v);
373 //             spt.outPut(spt.sz[spt.root]);
374         }else if ('M' == opt[0])
375         {
376 //            scaf2(l, r);
377             scanf("%d%d", &l, &r);
378             printf("%d
", spt.getMin(l, r));
379         }else if ('E' == opt[3])
380         {
381 //            scaf2(l, r);
382             scanf("%d%d", &l, &r);
383             spt.Reverse(l, r);
384 //            spt.outPut(spt.sz[spt.root]);
385         }else
386         {
387 //            scaf2(l, r); scaf(v);
388             scanf("%d%d%d", &l, &r, &v);
389             int len = r - l + 1;
390             v = (v % len + len) % len;
391             if (v) spt.Revolve(l, r, v);
392         }
393         spt.findKth(0, 0);
394 //        spt.outPut(spt.sz[spt.root]);
395 //        printf("%d
", spt.sz[spt.root]);
396     }
397     return 0;
398 }