【BZOJ】【P1552&3506】【Cqoi2014】【排序机械臂】【题解】【Treap】

传送门:http://www.lydsy.com/JudgeOnline/problem.php?id=3506 http://www.lydsy.com/JudgeOnline/problem.php?id=1552

区间min,区间reverse

注意要以原序列的位置为第二关键字

Code:

#include<cstdio>
#include<climits>
#include<cstdlib>
#include<iostream>
#include<algorithm>
using namespace std;
struct node{
int val,key,rev,size,id;
node *c[2],*mn;
void split(int ned,node *&p,node *&q);
node(int _val=0,int _id=0,node *C=0){
key=rand();val=_val;rev=0;size=1;
c[0]=c[1]=C;mn=this;id=_id;
}
void makerev(){
rev^=1;
swap(c[0],c[1]);
if(mn!=this&&c[0]->mn->val<=c[1]->mn->val){
if(c[0]->mn->id<c[1]->mn->id)mn=c[0]->mn;
}
}
void pushdown(){
if(rev){
c[0]->makerev();
c[1]->makerev();
rev^=1;
}
}
node* rz(){
size=c[0]->size+1+c[1]->size;
if(c[0]->mn->val<c[1]->mn->val
||(c[0]->mn->val==c[1]->mn->val&&c[0]->mn->id<c[1]->mn->id))
mn=c[0]->mn;else mn=c[1]->mn;
if(val<mn->val||(val==mn->val&&id<mn->id))
mn=this;
return this;
}
}*root,*Null;
node *merge(node *p,node *q){
if(p==Null)return q->rz();
if(q==Null)return p->rz();
p->pushdown();q->pushdown();
if(p->key<q->key){
p->c[1]=merge(p->c[1],q);
return p->rz();
}else{
q->c[0]=merge(p,q->c[0]);
return q->rz();
}
}
void node::split(int ned,node *&p,node *&q){
if(this==Null){p=q=Null;return;}
pushdown();
if(c[0]->size>=ned){
c[0]->split(ned,p,q);
c[0]=Null;rz();
q=merge(q,this);
}else{
c[1]->split(ned-c[0]->size-1,p,q);
c[1]=Null;rz();
p=merge(this,p);
}
}
node *p,*q,*r,*s;
int n;
int getint(){
int res=0;char c=getchar();
while(!isdigit(c))c=getchar();
while(isdigit(c))res=res*10+c-'0',c=getchar();
return res;
}
int main(){
Null=new node(INT_MAX,0);
Null->key=INT_MAX;Null->size=0;
Null->c[0]=Null->c[1]=Null;
root=Null;
scanf("%d",&n);
for(int i=1;i<=n;i++){
int x;scanf("%d",&x);
root=merge(root,new node(x,i,Null));
}
for(int i=1;i<=n;i++){
root->split(i-1,p,q);
int ps=i;r=q;
while(r->mn!=r){
r->pushdown();
if(r->c[0]->mn->id==r->mn->id)r=r->c[0];
else ps+=r->c[0]->size+1,r=r->c[1];
}ps+=r->c[0]->size;
printf("%d%c",ps," \n"[i==n]);
q->split(ps-i+1,r,s);
r->makerev();
root=merge(p,merge(r,s));
}
return 0;
}