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#include <cstdlib>
#include <typeinfo>
#include <iostream>
#include <vector>
#include <iterator>
using namespace std;
template<typename E>
class Place {
Place<E> *pre;
E value;
public:
static int count;
Place(Place<E>*a) : pre(a) {}
virtual ~Place() {pre = NULL;}
virtual void insert(E&) = 0;
virtual void print(int) = 0;
virtual void setR(Place<E> *) = 0;
virtual void setL(Place<E> *) = 0;
virtual Place<E>* getR() = 0;
virtual Place<E>* getL() = 0;
virtual int found(E&, int, const bool&) = 0;
virtual void remove(E&) = 0;
virtual Place<E>* go(E&, const bool&) = 0;
virtual void goUp(E&, E&) = 0;
virtual int getNum() = 0;
virtual void vecMake(vector<E> &a, int &i) = 0;
virtual void clean()=0;
virtual Place<E> *getPre() {return pre;}
virtual void setPre(Place<E> *a) {pre = a;}
virtual E& getVal() {return value;}
virtual void setVal(E& i) {value = i;}
virtual bool equals(Place<E> *a) {return a == this;}
virtual bool equals(E& i){return this->getVal() == i;}
};
template <typename E>int Place<E>::count = 0;
template<typename E>
class Node : public Place<E> {
Place <E>*left;
Place <E>*right;
public:
Node(Place <E>*a) : Place<E>::Place(a) {}
virtual ~Node() { Place<E>::count--;
if(left != NULL){delete left;}
if(right != NULL){delete right;}}
virtual void setL(Place<E>* a) {left = a;}
virtual void setR(Place<E>* a) {right = a;}
virtual void print(int i) {
left->print(i+1);
cout << "<" << this->getVal()<<"|"<<i<< ">";
right->print(i+1);
}
virtual void insert(E& i) {go(i, true)->insert(i);}
virtual Place<E>* getR() {return right;}
virtual int found(E& i, int j, const bool &b) {return go(i, true)->found(i, j+1, b);}
virtual void remove(E& i) {go(i, true)->remove(i);}
virtual Place<E>* go(E& i, const bool &b) {
if (b) {if (i >= this->getVal()) return right;
else return left;
} else {if (i >= this->getVal()) return left;
else return right;
}}
virtual void goUp(E &i, E &j) {
if (this->equals(i)){
this->setVal(j);
return;
}this->getPre()->goUp(i, j);
}
virtual Place<E>* getL() { return left;}
virtual int getNum() {return -1;}
virtual void vecMake(vector<E>& a, int &i) {
left->vecMake(a, i);
right->vecMake(a, i);
}
};
template <typename E>
class Leaf : public Place<E> {
int numbers;
public:
Leaf(Place <E>*a) : Place<E>::Place(a) {numbers = 1;}
virtual ~Leaf() {Place<E>::count--;}
virtual void clean(){delete this;}
virtual void print(int i) {cout << this->getVal();}
virtual void setR(Place <E>*) {return;}
virtual void setL(Place <E>*) {return;}
virtual void insert(E &i) {
if (this->equals(i)) {
numbers++;
return;
}Place<E>::count+=2;
Place <E>*pom = new Node<E> (this->getPre());
Place <E>*tmp = new Leaf<E> (pom);
tmp->setVal(i);
this->setPre(pom);
if (i < this->getVal()) {
pom->setL(tmp);
pom->setR(this);
pom->setVal(this->getVal());
} else {
pom->setL(this);
pom->setR(tmp);
pom->setVal(i);
}
if (pom->getPre()->getR()->equals(this)) {
pom->getPre()->setR(pom);
} else pom->getPre()->setL(pom);
}
virtual Place<E>* getR() {return NULL;}
virtual int found(E &i, int j, const bool &b) {
if (!this->equals(i)){
if(!b) return -1;
else return 0;
}
if (b) return numbers;
return j;
}
virtual void remove(E &i) {
if (!this->equals(i)) return;
if (numbers != 1) {//this->getVal() == i &&
numbers--;
return;
}
Place<E>*omg = this->getPre();
Place<E>*tmp = omg->getPre();
Place<E>*pom=omg->go(i, false);
if (tmp->getVal() > i) {
tmp->setL(pom);
} else tmp ->setR(pom);
pom->setPre(tmp);
pom->goUp(i, this->getPre()->getVal());
tmp = NULL;
pom = NULL;
if(omg->getVal()>i){
omg->setR(NULL);
}else omg->setL(NULL);
delete omg;
}
virtual Place<E>* go(E&, const bool&) {return NULL;}
virtual void goUp(E &i, E &j) {this->getPre()->goUp(i, j);}
virtual Place<E>* getL() {return NULL;}
virtual int getNum() {return numbers;}
virtual void vecMake(vector<E>& a, int &i) {
a.push_back(this->getVal());
i++;
}
};
template<typename E>
class Root : public Place<E> {
Place<E> *next;
public:
Root():Place<E>::Place(NULL){next = NULL;}
virtual ~Root(){
Place<E>::count--;
if(next != NULL){
delete next;
}
}
virtual void insert(E& i){
if (next == NULL) {
next = new Leaf<E> (this);
next->setVal(i);
Place<E>::count++;
return;
}next->insert(i);
}
virtual void print(int i){
if(next == NULL) return;
next->print(i);
}
virtual void setR(Place<E> * a){next = a;}
virtual void setL(Place<E> * a){next = a;}
virtual Place<E>* getR(){return next;}
virtual Place<E>* getL(){return next;}
virtual int found(E &i, int j, const bool &b){
if(next == NULL){
if(b){return 0;}
else {return -1;}}
return next->found(i, j, b);
}
virtual void remove(E &i){
if(next == NULL) return;
if((typeid(*next) == typeid(Leaf<E>)) && (next->equals(i)) && (next->getNum() == 1)){
delete next;
next = NULL;
return;
}next->remove(i);
}
virtual Place<E>* go(E&, const bool&){return next;}
virtual void goUp(E&, E&){return;}
virtual int getNum(){return -1;}
virtual void vecMake(vector<E> &a, int &i){
if(next == NULL) return;
next->vecMake(a,i);
}
};
template<typename E>
class BSTSET{
Place<E> *root;
int p;
int size;
vector<E> a;
public:
class iterator {
vector<E> vec;
int val;
public:
iterator(vector<E> a, int i):vec(a),val(i){}
iterator& operator++() {
++val;
return *this;
}
iterator operator++(int) {
iterator tmp(*this);
operator++();
return tmp;
}
bool operator==(const iterator& rhs) {return val == rhs.val;}
bool operator!=(const iterator& rhs) {return val != rhs.val;}
E& operator*() {return vec[val];}
};
iterator& begin() {
vecMake();
p = 0;
iterator tmp();
return (*new iterator(a,p));
}
iterator& end() {return (*new iterator(a,size));}
BSTSET() {
Place<E>::count++;
root = new Root<E>();
size = 0;
}
~BSTSET() {clear();}
void clear(){
cout<<"count: "<<Place<E>::count<<"\n";
delete root;
cout<<"count: "<<Place<E>::count<<"\n";
}
void insert(E i) {root->insert(i);}
void remove(E i) {root->remove(i);}
void print() {root->print(1);}
int getDeep(E i) {return root->found(i, 1, false);}
int getNum(E i) {return root->found(i, 1, true);}
void operator <<(E i) {insert(i);}
int operator[](E i) {return getDeep(i);}
int operator()(E i) {return getNum(i);}
void operator >>(E i) {remove(i);}
friend ostream& operator <<(ostream& os, BSTSET& bst) {
bst.print();
return (os);
}
void vecMake() {root->vecMake(a, size);}
};
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