import java.util.Scanner;
class Stack
{
int stk[]=new int[10];
int top;
Stack()
{
top=-1;
}
void Push (int item)
{
if (top==9)
System.out.println("Stack overflow");
else
stk[++top]=item;
}
boolean isEmpty()
{
if (top<0)
return true;
else
return false;
}
int Pop()
{
if (isEmpty())
{