#include<stdio.h>
#include<stdlib.h>
int top=-1,size=5;
int isfull()
{
    if(top==size-1)
     return 1;
     else
     return 0;
}
void push()
{
    if(isfull())
     printf("Stack is full\n");
     else
      arr[++top]=num;
}
int isempty()
{
    if(top==-1)
     return 1;
     else
      return 0;
}
void pop()
{
    if(isempty())
     printf("stack is empty");
    else
      arr[top--]
}
void display()
{
    for(i=0;i<=top;i++)
    {
        printf("%d",arr[i]);
    }
}
int main()
{
    int i,num;
    scanf("%d",&size);
    if(size<0)
    {
        printf("Invalid input");
        return 0;
    }
    for(i=1;i<=size;i++)
    {
        scanf("%d",num);
        push();
    }
    display();
}