劍指 Offer 06. 從尾到頭打印鏈表
2022-05-29 22:28:21

 1 /**
 2  * Definition for singly-linked list.
 3  * struct ListNode {
 4  *     int val;
 5  *     ListNode *next;
 6  *     ListNode(int x) : val(x), next(NULL) {}
 7  * };
 8  */
 9 class Solution {
10 public:
11     vector<int> reversePrint(ListNode* head) {
12         vector<int> ans;
13         stack<int> stk;
14         while (head != nullptr) {
15             stk.push(head->val);
16             head = head->next;
17         }
18         while (!stk.empty()) {
19             int top = stk.top();
20             stk.pop();
21             ans.emplace_back(top);
22         }
23         return ans;
24     }
25 };