输入一个链表的头节点,从尾到头反过来返回每个节点的值(用数组返回)。
示例 1:
输入:head = [1,3,2]
输出:[2,3,1]
限制:
0 <= 链表长度 <= 10000
思路
栈是最合适的,全部压入栈然后再出栈
不过忘了怎么写栈了……写了个数组,是一样的
/**
* Definition for singly-linked list.
* public class ListNode {
* public int val;
* public ListNode next;
* public ListNode(int x) { val = x; }
* }
*/
public class Solution {
public int[] ReversePrint(ListNode head) {
int count = 0;
ListNode node = head;
while (node != null){
count++;
node = node.next;
}
int[] nums = new int[count];
while(count >= 1){
nums[count-1] = head.val;
count --;
head = head.next;
}
return nums;
}
}