题目描述
输入一个链表,按链表从尾到头的顺序返回一个ArrayList
方法一:
/*function ListNode(x){
this.val = x;
this.next = null;
}*/
function printListFromTailToHead(head)
{
let arr = []
while(head){
arr.unshift(head.val)
head = head.next
}
return arr
}