0%

Problem 85


Problem 85


Counting Rectangles

By counting carefully it can be seen that a rectangular grid measuring 3 by 2 contains eighteen rectangles:

Although there exists no rectangular grid that contains exactly two million rectangles, find the area of the grid with the nearest solution.


数长方形

在一个3×2的长方形网格中包含有18个不同大小的长方形,如下图所示:

不存在任意大小的长方形网格中包含有恰好两百万个长方形。求包含长方形的数目最接近两百万的长方形网格的面积。


Gitalking ...