OJ Board

AC at last. Of course, the trouble was in the input format There might be more that one space before "L/LS".

2alex[LSD]: Those tests passed fine though your input format seems strange

Thanks. I come from the same consideration but get WA and can't find what's wrong . Could anyone provide some test data, pls?

What it the correct definition for distance between two non-intersecting line segments? Is it the length of shortest perpendicular dropped from segment endpoint to another segment?