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此题题目没提到的一些数据范围

Posted by CZDleaf at 2013-11-30 11:02:55 on Problem 1703 and last updated at 2013-11-30 11:03:27 
1、N>=3
2、A x y或D x y时，x!=y，且1<=x,y<=N
3、给出一个D x y时，不会与之前的描述矛盾，但可能已能从之前的描述中推断x,y不是同一犯罪团伙所为
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