看这句话：provided that a new segment will touch no segment already added,
 except at an endpoint. Play stops after a winning move, which is when a
 player's segments complete a connected path between the player's
 endzones.
 它说新的线段不能和以前的线段相交。那个和对方的线段的端点相交算不算呢？ 
4 5
0 2 1 3 4 2 2 1 2 1
yes
这组数据我的程序是 yes,也过了。而且没有管except at an endpoint 这句话。