HDU 4006 Treap

Continue to test the template ...

1#include <iostream>2#include <cstring>3#include <cstdlib>4#include <cstdio>5#include <ctime>6 using namespacestd;7 8 structNode9 {TenNode * ch[2]; One     intV, R, size, CNT; A     intcmpintx) -     { -         if(x = = v)return-1; the         returnX < v?0:1; -     }     -     voidMaintain () -     { +Size =CNT; -         if(ch[0]! = NULL) Size + = ch[0]->size; +         if(ch[1]! = NULL) Size + = ch[1]->size; A     } at }; -  - voidRotate (Node * & O,intd) - { -Node * k = o->ch[d ^1]; -O->ch[d ^1] = k->Ch[d]; inK-&GT;CH[D] =o; -O->maintain (); toK->maintain (); +o =K; - } the  * voidInsert (Node * & O,intx) $ {Panax Notoginseng     if(O = =NULL) -     { theo =NewNode (); +o->ch[0] = o->ch[1] =NULL; AO->v =x; theO->r =rand (); +O->size = o->cnt =1; -     } $     Else $     { -         intD = o->CMP (x); -         if(d = =-1 ) the         { -o->cnt++;Wuyio->size++; the         } -         Else Wu         { -Insert (o->Ch[d], x); About             if(O->ch[d]->r > o->R) $             { -Rotate (o, D ^1 ); -             } -             Else A             { +O->maintain (); the             } -         } $     } the } the  the intKTH (Node * o,intk) the { -     intTMP = (o->ch[0] = = NULL?0: o->ch[0]->size); in     if(k >= tmp +1&& k <= tmp + o->cnt)returnO->v; the     Else if(K < TMP +1)returnKTH (o->ch[0], k); the     Else returnKTH (o->ch[1], k-tmp-o->CNT); About } the  the voidClear (Node *o) the { +     if(o = = NULL)return ; -Clear (o->ch[0] ); theClear (o->ch[1] );Bayi     Deleteo; the } the  - intMain () - { the     intN, K; the      while(SCANF ("%d%d", &n, &k)! =EOF) the     { theNode * Root =NULL; -         Charop[2]; the          for(inti =0; I < n; i++ ) the         { thescanf"%s", op);94             if(op[0] =='I' ) the             { the                 inttmp; thescanf"%d", &tmp);98 Insert (root, tmp); About             } -             Else101             {102printf"%d\n", kth (Root, Root->size +1-k));103             }104         } the Clear (root);106Root =NULL;107     }108     return 0;109}

HDU 4006 Treap