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谁能说下这个题目的Sample为什么是7/16啊怎么看从最上面掉到第3格的方法也只有5种啊
0
1 -2
3 4 5
6 -7 8 9
10 11 12 13 14
上面-的地方说明没钉子,5种分别是
0->1->3->6->11->2号格
0->1->3->2号格
0->1->4->2号格
0->1->4->8->12->2号格
0->8->12->2号格
想不到还有其它走法了啊,谁解释下
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