题解 | #反转链表#
反转链表
https://www.nowcoder.com/practice/75e878df47f24fdc9dc3e400ec6058ca
struct ListNode* ReverseList(struct ListNode* head ) {
struct ListNode *n1=NULL,*n2=head,*n3=head->next;
if(head)
{
while(n2)
{
n2->next=n1;
n1=n2;
n2=n3;
if(n3)
n3=n2->next;
}
}
return n1;
}
