/**
* struct ListNode {
* int val;
* struct ListNode *next;
* ListNode(int x) : val(x), next(nullptr) {}
* };
*/
#include <vector>
class Solution {
public:
/**
* 代码中的类名、方法名、参数名已经指定,请勿修改,直接返回方法规定的值即可
*
*
* @param head ListNode类 the head
* @return bool布尔型
*/
bool isPail(ListNode* head) {
// write code here
vector<int> v;
ListNode* cur = head;
while (cur) {
v.push_back(cur->val);
cur = cur->next;
}
int left = 0, right = v.size() - 1;
while (left < right) {
if (v[left] != v[right]) {
return false;
}
++left;
--right;
}
return true;
}
};