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Discussion of Problem 1609. Tram Tile

caoqinxiang But how to solve this problem?? [5] // Problem 1609. Tram Tile 6 Apr 2008 07:49
olao Give some Hint,please // Problem 1609. Tram Tile 29 Apr 2008 21:22
DK [Samara SAU 1: X2008] How to prove that... [2] // Problem 1609. Tram Tile 31 Mar 2008 02:28

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