任意の2点の中点

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forked from: forked from: fork..

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forked from: forked from: fork..

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flash on 2010-2-27

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forked from: forked from: flas..

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flash on 2010-2-14

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forked from: flash on 2009-12-..

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flash on 2009-12-25

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flash on 2009-12-23

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flash on 2009-12-23

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flash on 2009-12-23

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fibonacci number

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