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typedef struct node{
int data;
struct node* next;
node(int d):data(d), next(NULL){}
}node;
void reverse(node* head)
{
if(head == NULL){
return;
}
node* pleft = NULL;
node* pcurrent = head;
node* pright = head->next;
while(pright){
pcurrent->next = pleft;
node *ptemp = pright->next;
pright->next = pcurrent;
pleft = pcurrent;
pcurrent = pright;
pright = ptemp;
}
while(pcurrent != NULL){
cout<< pcurrent->data << "\t";
pcurrent = pcurrent->next;
}
}
class Solution<T> {
public void reverse(ListNode<T> head) {
if (head == null || head.next == null) {
return ;
}
ListNode<T> currentNode = head;
Stack<ListNode<T>> stack = new Stack<>();
while (currentNode != null) {
stack.push(currentNode);
ListNode<T> tempNode = currentNode.next;
currentNode.next = null; // 断开连接
currentNode = tempNode;
}
head = stack.pop();
currentNode = head;
while (!stack.isEmpty()) {
currentNode.next = stack.pop();
currentNode = currentNode.next;
}
}
}
class ListNode<T>{
T val;
public ListNode(T val) {
this.val = val;
}
ListNode<T> next;
}
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