Problem F: 怎样翻转链表?

Memory Limit：128 MB Time Limit：1.000 S
Judge Style：Text Compare Creator：
Submit：175 Solved：47

Description

怎样翻转链表?

Input

1,2,3,4,5,6,7

Output

7,6,5,4,3,2,1

Sample Input Copy 

1,2,3,4,5,6,7

Sample Output Copy 

7,6,5,4,3,2,1
Return to contestSubmitSubmit RecordShowOff!