面试题06:从尾到头打印链表(C++)

题目链接https://leetcode-cn.com/problems/cong-wei-dao-tou-da-yin-lian-biao-lcof/

题目描述

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)

输入:head = [1,3,2]

输出:[2,3,1]

解题思路

使用栈依次存入节点,然后再从栈中取出节点可实现逆序,即从尾到头打印链表

程序源码

/**
 * Definition for singly-linked list.
 * struct ListNode {
 *     int val;
 *     ListNode *next;
 *     ListNode(int x) : val(x), next(NULL) {}
 * };
 */
class Solution {
public:
    vector<int> reversePrint(ListNode* head) {
        vector<int> revResult;
        stack<int> sk;
        while(head != nullptr)
        {
            sk.push(head->val);
            head = head->next;
        }
        while(!sk.empty())
        {
            revResult.push_back(sk.top());
            sk.pop();
        }
        return revResult;
    }
};
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转载自www.cnblogs.com/wzw0625/p/12501851.html