# 836. Rectangle Overlap

## Description

An axis-aligned rectangle is represented as a list [x1, y1, x2, y2], where (x1, y1) is the coordinate of its bottom-left corner, and (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.

Example 1:

Input: rec1 = [0,0,2,2], rec2 = [1,1,3,3]
Output: true


Example 2:

Input: rec1 = [0,0,1,1], rec2 = [1,0,2,1]
Output: false


Example 3:

Input: rec1 = [0,0,1,1], rec2 = [2,2,3,3]
Output: false


Constraints:

• rec1.length == 4
• rec2.length == 4
• -109 <= rec1[i], rec2[i] <= 109
• rec1 and rec2 represent a valid rectangle with a non-zero area.

## Solutions

• class Solution {
public boolean isRectangleOverlap(int[] rec1, int[] rec2) {
int x1 = rec1[0], y1 = rec1[1], x2 = rec1[2], y2 = rec1[3];
int x3 = rec2[0], y3 = rec2[1], x4 = rec2[2], y4 = rec2[3];
return !(y3 >= y2 || y4 <= y1 || x3 >= x2 || x4 <= x1);
}
}

• class Solution {
public:
bool isRectangleOverlap(vector<int>& rec1, vector<int>& rec2) {
int x1 = rec1[0], y1 = rec1[1], x2 = rec1[2], y2 = rec1[3];
int x3 = rec2[0], y3 = rec2[1], x4 = rec2[2], y4 = rec2[3];
return !(y3 >= y2 || y4 <= y1 || x3 >= x2 || x4 <= x1);
}
};

• class Solution:
def isRectangleOverlap(self, rec1: List[int], rec2: List[int]) -> bool:
x1, y1, x2, y2 = rec1
x3, y3, x4, y4 = rec2
return not (y3 >= y2 or y4 <= y1 or x3 >= x2 or x4 <= x1)


• func isRectangleOverlap(rec1 []int, rec2 []int) bool {
x1, y1, x2, y2 := rec1[0], rec1[1], rec1[2], rec1[3]
x3, y3, x4, y4 := rec2[0], rec2[1], rec2[2], rec2[3]
return !(y3 >= y2 || y4 <= y1 || x3 >= x2 || x4 <= x1)
}