输出单向链表中倒数第k个节点

import java.util.ArrayList;
import java.util.Scanner;

public class Main
{
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
while (scanner.hasNext())
{
int n = scanner.nextInt();
ArrayList<Integer> list = new ArrayList<>();
for (int i = 0; i < n; i++)
list.add(scanner.nextInt());
int k = scanner.nextInt();
if (k < list.size() && k > 0)
System.out.println(list.get(list.size() - k));
else
System.out.println(0);
}
}
}