[876] Middle of the Linked List

什麼我竟然除了compile error 之外一次就accept 了嗎！！！

太感人～～～～～～～

/**

* Definition for singly-linked list.

* struct ListNode {

* int val;

* struct ListNode *next;

* };

*/

struct ListNode* middleNode(struct ListNode* head){

struct ListNode *p1, *p2;

p1=head;

p2=head->next;

while(p2!=NULL)

{

p1=p1->next;

if (p2->next !=NULL)

p2 = p2-> next ->next ;

else

break;

}

return p1;

}