StackLinkedList

import java.util.*;

public class Stack<T> {

    private LinkedList<T> store;

    public Stack() {

        store = new LinkedList<>();
    }

    public int size() {
        return 0;
    }

    public T pop() {
        // write your code here
        return null;
    }

    public void push(T val) {
        // write your code here
    }

    public T peek() {
        // write your code here
        return null;
    }

}