Rectangle#2792
On a sheet of paper divided into square cells, rectangles are drawn. Their sides are parallel to the grid lines, and the vertices have integer coordinates. Find the rectangle of minimum area that covers all the given rectangles, with its sides also parallel to the grid lines.
The first line contains the integer (1 \leq K \leq 100). Each of the next lines contains four integers, which are the coordinates of two opposite vertices of each rectangle (the absolute values of the coordinates do not exceed 10^5).
Output the area of the minimum rectangle.
Example 1