原题题目
代码实现
/**
* Definition for singly-linked list.
* struct ListNode {
* int val;
* ListNode *next;
* ListNode(int x) : val(x), next(NULL) {}
* };
*/
class Solution {
public:
ListNode* reverseList(ListNode* head) {
ListNode* pre=nullptr;
auto cur=head;
while(cur)
{
auto next=cur->next;
cur->next=pre;
pre=cur;
cur=next;
}
return pre;
}
};
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