star's submissions for 1189 杨辉三角形

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on Dec. 18, 2010, 3:55 p.m.
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IR | C
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on Dec. 18, 2010, 3:11 p.m.
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IR | C
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on Dec. 18, 2010, 3:11 p.m.
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IR | C
star
on Dec. 18, 2010, 3:11 p.m.
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