jx070215's submissions for 1189 杨辉三角形

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jx070215
on Nov. 2, 2007, 11:30 a.m.
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jx070215
on Nov. 2, 2007, 11:27 a.m.
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152.00 KB
jx070215
on Nov. 2, 2007, 11:22 a.m.
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152.00 KB