use line sweep method

On 7/20/11, Dumanshu <duman...@gmail.com> wrote:
> Describe
 an
 algorithm 
that
 takes an 
unsorted 
array 
of 
axis‐
> aligned 
rectangles 
and returns 
any 
pair 
of 
rectangles 
that
> overlaps, 
if 
there 
is such 
a 
pair. 

Axis‐aligned means 
that
> all 
the
 rectangle 
sides 
are 
either 
parallel
 or 
perpendicular
> to 
the 
x 
and y‐axis.

You 
can 
assume 
that each 
rectangle
> object 
has 
two 
variables 
in
 it : 
the 
x‐y coordinates 
of 
the
> upper‐left
 corner 
and 
the 
bottom‐right
 corner.
>
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-- 
Somnath Singh

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