PROGRAMMING:One way linked list 4
Definition of one-way linked list: input several positive integers (input - 1 is the end flag), and output them in the reverse order of input data.
Input and output example: description in brackets
###Input example:
```in
1 2 3 4 5 6 7 -1
```
###Output example:
```out
7 6 5 4 3 2 1
```
answer：If there is no answer, please comment
Input and output example: description in brackets
###Input example:
```in
1 2 3 4 5 6 7 -1
```
###Output example:
```out
7 6 5 4 3 2 1
```
answer：If there is no answer, please comment