/*
struct ListNode {
	int val;
	struct ListNode *next;
	ListNode(int x) :
			val(x), next(NULL) {
	}
};*/
class Solution {
public:
    ListNode* ReverseList(ListNode* pHead) {
		ListNode* p,* temp;
		if(pHead==nullptr)
		{
			return nullptr;
		}
		else 
		{
			p=pHead->next;
			pHead->next=nullptr;
			while(p!=nullptr)
			{
				temp=p->next;
				p->next=pHead;
				pHead=p;
				p=temp;
			}
			return pHead;
		}
		

    }
};