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为大家提供一组有参考价值的数据:

Posted by 200511701117 at 2007-06-16 19:41:04 on Problem 2049
1 6
1 2 1 5
0 2 0
0 3 0
0 4 0
0 5 0
0 6 0
0 7 0
0.5 5.5
答案是2
而不是4

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