链表中倒数第k个结点
链表中倒数第k个结点
http://www.nowcoder.com/questionTerminal/529d3ae5a407492994ad2a246518148a
/*
public class ListNode {
int val;
ListNode next = null;
ListNode(int val) {
this.val = val;
}
}*/
import java.util.Stack;
public class Solution {
public ListNode FindKthToTail(ListNode head,int k) {
if(head==null || k<=0)
return null;
Stack<ListNode> stack=new Stack<>();
while (head!=null){
stack.push(head);
head=head.next;
}
if (stack.size()<k){
return null;
}
int i=1;
ListNode listNode=null;
while (i<=k && !stack.isEmpty()){
listNode=stack.pop();
i++;
}
return listNode;
}
} 