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这组数据怎么搞，AC程序跑出来5，不AC的跑出来是4，可是算不出5

Posted by lxxxxj at 2010-12-22 16:44:33 on Problem 1466

6
0: (2) 1 4 
1: (2) 0 4 
2: (0) 
3: (0) 
4: (2) 0 1 
5: (0) 
我AC的程序最后答案输出n-k shr 1
没AC的最后答案输出（2*n-k) shr 1;

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