#include<iostream>
#include<conio.h>
using namespace std;
int size(int*);
int pop_up(int*,int);
int pop_down(int*,int);
int push_up(int*,int);
int push_down(int*,int);
int main()
{//main
    int* a=new int[0];
    char p,q;
    for(;p !='q';)
    {//for
         cout<<"PUSH=r or POP=b or EXIT=q :";
         cin>>p;
         if(p=='r')
         {//if
                 cout<<"UP=u or DOWN=d :";
                 cin>>q;
                 if (q=='u')
                 push_up(a,size(a));
                 if(q=='d')
                 push_down(a,size(a));
                 }//if
                 else
                 {//else
                     cout<<"UP=u or DOWN=d :";
                     cin>>q;
                     if(q=='u')
                     pop_up(a,size(a));
                     if(q=='d')
                     pop_down(a,size(a));
                     cout<<endl;
                     }//else
                     }//for
                     cout<<"press any key to exit:";
                     getch();
                     return 0;
                     }//main
int size(int* b[])
{//return number of array cells
    int m=sizeof(b)/sizeof(int);
    return m;
}//end of size function
int pop_up(int* c[],int n)
{//begin of pop_up function
    int s=n+1;
    int temp[s];
    for(int i=0;i<n;i++)
    temp[i]=c[i];
    delete [] c;
    cout<<"enter your number:";
    cin>>temp[s];
    return temp;
}//end of pop_up function
int pop_down(int* d[],int n)
{//begin of pop_down function
    int s=n+1;
    int* temp=new int[s];
    cout<<"enter your number:";
    cin>>temp[0];
    for(int i=0;i<s,i++)
    temp[i+1]=d[i];
    delete [] d;
    return temp;
}//end of pop_down function
int push_up(int* e[],int n)
{//begin of push_up function
    cout<<"number is:"<<e[n]<<endl;
    int s=n-1;
    int* temp=new int[s];
    for(int i=0;i<s;i++)
    temp[i]=e[i];
    delete [] e;
    return temp;
}//end of push_up function
int push_down(int* f[],int n)
{//begin of push_down function
    cout<<"number is:"<<f[0]<<endl;
    int s=n-1;
    int* temp=new int[s];
    for(int i=0;i<s;i++)
    temp[i]=f[i+1];
    delete [] f;
    return temp;
}//end of push_dowm function