中美洲奥赛题:过桥(2星)
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A Try 回复:中美洲奥赛题:过桥(2星)
-火球魔法-
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09/26/2009 postreply
14:14:44
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n*2^n
-雪山飞鱼-
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09/30/2009 postreply
10:18:36
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change to n*2^(n+1)
-雪山飞鱼-
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09/30/2009 postreply
10:22:42
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still miss one case, so (n+1)*2^(n+1) is correct.
-雪山飞鱼-
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09/30/2009 postreply
10:27:30
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哈哈
-火球魔法-
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09/30/2009 postreply
10:30:07
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(n-1)!
-momlucky-
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10/12/2009 postreply
00:19:50
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回复:中美洲奥赛题:过桥(2星)
-jamtien-
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11/07/2009 postreply
16:42:00
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(n-1)*2^(n+1)
-jamtien-
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11/07/2009 postreply
16:42:56