题目描述
输入一个链表,反转链表后,输出新链表的表头。
/*
public class ListNode {
int val;
ListNode next = null;
ListNode(int val) {
this.val = val;
}
}*/
public class Solution {
public ListNode ReverseList(ListNode head) {
ListNode pre = null;
ListNode cur = head;
ListNode next = null;
while(cur != null) {
next = cur.next;
cur.next= pre;
pre=cur;
cur=next;
}
return pre;
}
}







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