package datastructs;

import java.util.ArrayList;

import java.util.List;

public class ListNode {

public int val;

public ListNode next;

public ListNode() {}

public ListNode(int val) { this.val = val; }

public ListNode(int val, ListNode next) { this.val = val; this.next = next; }

public ListNode(List<Integer> numbers) {

var rst = new ListNode();

var head = rst;

for (Integer number : numbers) {

rst.next = new ListNode(val);

rst = rst.next;

rst.val = number;

}

this.val = head.next.val;

this.next = head.next.next;

}

public String printAsList(){

var rst = new ArrayList<String>();

var cur = this;

while (cur != null){

rst.add(String.valueOf(cur.val));

cur = cur.next;

}

return String.join(", ", rst);

}

}