//An axis-aligned rectangle is represented as a list [x1, y1, x2, y2], where...

//(x1, y1) is the coordinate of its bottom-left corner

//(x2, y2) is the coordinate of its top-right corner

//Its top and bottom edges are parallel to the X-axis, and its left and right edges are parallel to the Y-axis.

//Two rectangles overlap if the area of their intersection is positive

//To be clear, two rectangles that only touch at the corner or edges do not overlap.

//Given two axis-aligned rectangles rec1 and rec2, return true if they overlap, otherwise return false.

class Solution {

public boolean isRectangleOverlap(int[] rec1, int[] rec2) {

//the x1 and y1 of the first rectangle would need to be less than the x2 and y2 of the second rectange

//additionally, the x2 and y2 of the first rectangle would need to be greater than the x1 and y1 of the second rectangle

return rec1[0] < rec2[2] && rec2[0] < rec1[2] && rec1[1] < rec2[3] && rec2[1] < rec1[3];

}

}