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SCU 2007 warmup contest 9

Thanks to UESTC ACMers!
Contest has finished at 2007-04-16 23:00.

ID Problem
A A Simple Problem
B Bus
C The Queen¡¯s New Necklaces
D Erdos Number
E Erdos¡¯ Travel
F Farey Sequence
G Playground
H Cube
I Binary trees
J Tom¡¯s Game
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