说明:北京大学ACM题
Here is a geometric problem. You have an angle and some squares in the first quadrant of the plane rectangular coordinates. The vertex of the angle is fixed on the origin O of the coordinates, and both of i <pengfam> 在 2008-10-13 上传
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说明:北京大学ACM比赛题
The game of Scrabble is played with tiles. A tile either has a single letter written on it, or it is blank. In the latter case, the tile may be used to represent a letter of your choice. On your turn, you ar <pengfam> 在 2008-10-13 上传
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