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不是spj??

Posted by FamerJohn at 2007-10-31 20:54:45 on Problem 3441 
这组数据是：

5 3
XOX
XOX
XOO
XOO
XXO
1 6

B: 1-5
C: 5-6

or

B: 1-3
C: 3-6
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