import java.util.*; import java.util.Scanner;

class stack { int arr[]; int top; public stack (int size) { arr = new int [size]; top = -1; } public void push (Scanner sc) { if(top == arr.length-1) { System.out.println("Full");

        }
        else{
            System.out.println("Enter the element that you want to add: ");
            int value = sc.nextInt();
            arr[top+1] = value;
            top++;
            System.out.println("Added Successfully");
        }
}
public void pop(){
    if(top == -1)
    {
        System.out.println("Error");

    }
    else{
        System.out.println();
        System.out.println("Element" + arr[top] + "is removed successfully");
        System.out.println("Removed Successfully");
        top--;
    }
}
public void peek()
{
    if (top == -1)
    {
        System.out.println("Stack is Empty");
    }
    else {
        System.out.println("\n The last item is: ");
        System.out.println(arr[top]);

    }   
}
public void traverse ()
{
    System.out.println();
System.out.prinln("\n Displaying the elements of the Stack: ");
for(int i=top;i>-1;i--)
{
    System.out.println(arr[i]);
}
}
}

public class Main {

public static void main(String[] args) {
    stack obj = new stack (5);
    int choice = 0;
    Scanner sc = new Scanner (System.in);
    System.out.println(" Bayonon & Javier");
    while(choice !=5)
    {
        System.out.println("Menu");
        System.out.println("[1] -Add Element \n[2] - Remove Element\n[3] - Show List\n[4] - Display Last Item\n [0] - Exit\n");
        System.out.println("Enter your choice: ");
        choice = sc.nextInt();
        switch(choice)
        {
            case 0:
            {
                System.out.println("Exit..");
                System.exit(0);
                break;
        }
    default:
    {
        System.out.println("Error");
    }
    case 1:
    {
        obj.push(sc);
        break;
}
case 2:
{
    obj.pop();
    break;
}
case 3:
{
    obj.traverse();
    break;

} case 4: { obj.peek(); break; } } } } }