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这样的数据合法么？

Posted by 20053565 at 2008-04-06 20:25:22 on Problem 3410 and last updated at 2008-04-06 20:26:11 
-------  --------
|     /  \      |
|    /    \     |
|   -------     |
|               |
-----------------


       /\
      /  \
     /    \
    -------

比如
8
-3 0
3 0
3 2
1 2
2 1
-2 1
-1 2
-3 2
3
-2 1
2 1
0 3
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