#include <iostream>
#include<string>
#include <vector>

using namespace std;
class CNode{
public:
    CNode(int val){
        pi_val=new int(val);
    }
    CNode(CNode &other){
        pi_val=other.pi_val;
        for(int i=0; i<other.v_kids.size(); i++){
            v_kids.push_back(other.v_kids[i]);
        }
    }
    ~CNode(){
        delete pi_val;
        for(int i=0; i<v_kids.size(); i++){
            delete v_kids[i];
        }
    }
    void vSetVal(int iVal){
        *pi_val=iVal;
    }
    void vAdd(CNode *pcKid){
        v_kids.push_back(pcKid);
    }
    void vPrint(){
        cout<<*pi_val;
        for(int i=0; i<v_kids.size(); i++){
            v_kids[i]->vPrint();
        }
    }

private:
    int *pi_val;
    vector<CNode*> v_kids;
};

class CTree{
public:
    CTree(){
        pc_root=new CNode(0);
    }
    CTree(CTree &other){
        ???
    }
    ~CTree(){
        delete pc_root;
    }
    CNode *pcGetRt(){
        return pc_root;
    }
    void vPrint(){
        pc_root->vPrint();
    }
private:
    CNode *pc_root;
};

int main() {
    CTree c_t0;
    c_t0.pcGetRt()->vSetVal(1);
    c_t0.pcGetRt()->vAdd(new CNode(2));

    CNode *pc_buf;
    pc_buf = new CNode(3);
    pc_buf->vAdd(new CNode(4));
    c_t0.pcGetRt()->vAdd(pc_buf);

    CTree *pc_copy = new CTree(c_t0);
    c_t0.vPrint();
    //pc_copy->vPrint();
    delete pc_copy;
}