Valid Square 6对点：4条边，2条对角线
Construct the Rectangle with area A 开根号
Minimum Area Rectangle I (axis aligned) 对角线AB找CD
Minimum Area Rectangle II (not aligned) 三点ABC内积为0找D
Check Rectangle Overlap
Rectangle Overlap Area
Number Of Corner Rectangles 枚举起始行x，终止行y，计数同时为1
Maximal Square dp[i][j], 1+min(左，上，斜)
Maximal Rectangle 📊最大矩形
Largest Rectangle in Histogram 📊最大矩形 升序栈
The Skyline Problem (L, -H, R)(R, H, #)
Union Area of Rectangles hard
Perfect Rectangle hard
Max Increase to Keep City Skyline
Queue Reconstruction by Height