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zdd
Beijing, China
cnblogs.com/graphics
Age: 31
I like computer graphics and DirectX
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68
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How do you find the center of a circle with a pencil and a book?
puzzle
recreational-mathematics
asked Oct 2 '12 at 12:06
math.stackexchange.com
Top Answers
6
Reversing a linked list
codereview.stackexchange.com
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