HDU5128 practice careful degree of problem ah really ....

Title Link: http://acm.hdu.edu.cn/showproblem.php?pid=5128

Test instructions: give you the coordinates of N (n < 30) points, and then let you find out the area of the two largest rectangles that the N points can make, the following three cases are not counted;

If there is such a two rectangle on the output of the largest area, otherwise output imp;

Analysis: Because there are only 30 points, pure violence on OK, four points, four points of enumeration, 4-layer loop is OK;

PS: Because the field on the wrong topic, did not see the edge of the rectangle is parallel to the axis, is purely in accordance with the geometry to do, in fact, there is a pit, that is, when the two rectangle nested, the output of the largest rectangular area can, can not output imp;

This is really a practice of careful degree of a topic, completely can be used in meditation!!!

HDU5128 practice careful degree of problem ah really ....