{ "data": { "question": { "questionId": "3325", "questionFrontendId": "3047", "categoryTitle": "Algorithms", "boundTopicId": 2650446, "title": "Find the Largest Area of Square Inside Two Rectangles", "titleSlug": "find-the-largest-area-of-square-inside-two-rectangles", "content": "
There exist n
rectangles in a 2D plane. You are given two 0-indexed 2D integer arrays bottomLeft
and topRight
, both of size n x 2
, where bottomLeft[i]
and topRight[i]
represent the bottom-left and top-right coordinates of the ith
rectangle respectively.
You can select a region formed from the intersection of two of the given rectangles. You need to find the largest area of a square that can fit inside this region if you select the region optimally.
\n\nReturn the largest possible area of a square, or 0
if there do not exist any intersecting regions between the rectangles.
\n
Example 1:
\n\nInput: bottomLeft = [[1,1],[2,2],[3,1]], topRight = [[3,3],[4,4],[6,6]]\nOutput: 1\nExplanation: A square with side length 1 can fit inside either the intersecting region of rectangle 0 and rectangle 1, or the intersecting region of rectangle 1 and rectangle 2. Hence the largest area is side * side which is 1 * 1 == 1.\nIt can be shown that a square with a greater side length can not fit inside any intersecting region.\n\n\n
Example 2:
\n\nInput: bottomLeft = [[1,1],[2,2],[1,2]], topRight = [[3,3],[4,4],[3,4]]\nOutput: 1\nExplanation: A square with side length 1 can fit inside either the intersecting region of rectangle 0 and rectangle 1, the intersecting region of rectangle 1 and rectangle 2, or the intersection region of all 3 rectangles. Hence the largest area is side * side which is 1 * 1 == 1.\nIt can be shown that a square with a greater side length can not fit inside any intersecting region.\nNote that the region can be formed by the intersection of more than 2 rectangles.\n\n\n
Example 3:
\n\nInput: bottomLeft = [[1,1],[3,3],[3,1]], topRight = [[2,2],[4,4],[4,2]]\nOutput: 0\nExplanation: No pair of rectangles intersect, hence, we return 0.\n\n\n
\n
Constraints:
\n\nn == bottomLeft.length == topRight.length
2 <= n <= 103
bottomLeft[i].length == topRight[i].length == 2
1 <= bottomLeft[i][0], bottomLeft[i][1] <= 107
1 <= topRight[i][0], topRight[i][1] <= 107
bottomLeft[i][0] < topRight[i][0]
bottomLeft[i][1] < topRight[i][1]
在二维平面上存在 n
个矩形。给你两个下标从 0 开始的二维整数数组 bottomLeft
和 topRight
,两个数组的大小都是 n x 2
,其中 bottomLeft[i]
和 topRight[i]
分别代表第 i
个矩形的 左下角 和 右上角 坐标。
我们定义 向右 的方向为 x 轴正半轴(x 坐标增加),向左 的方向为 x 轴负半轴(x 坐标减少)。同样地,定义 向上 的方向为 y 轴正半轴(y 坐标增加),向下 的方向为 y 轴负半轴(y 坐标减少)。
\n\n你可以选择一个区域,该区域由两个矩形的 交集 形成。你需要找出能够放入该区域 内 的 最大 正方形面积,并选择最优解。
\n\n返回能够放入交集区域的正方形的 最大 可能面积,如果矩形之间不存在任何交集区域,则返回 0
。
\n\n
示例 1:
\n\n输入:bottomLeft = [[1,1],[2,2],[3,1]], topRight = [[3,3],[4,4],[6,6]]\n输出:1\n解释:边长为 1 的正方形可以放入矩形 0 和矩形 1 的交集区域,或矩形 1 和矩形 2 的交集区域。因此最大面积是边长 * 边长,即 1 * 1 = 1。\n可以证明,边长更大的正方形无法放入任何交集区域。\n\n\n
示例 2:
\n\n输入:bottomLeft = [[1,1],[2,2],[1,2]], topRight = [[3,3],[4,4],[3,4]]\n输出:1\n解释:边长为 1 的正方形可以放入矩形 0 和矩形 1,矩形 1 和矩形 2,或所有三个矩形的交集区域。因此最大面积是边长 * 边长,即 1 * 1 = 1。\n可以证明,边长更大的正方形无法放入任何交集区域。\n请注意,区域可以由多于两个矩形的交集构成。\n\n\n
示例 3:
\n\n输入:bottomLeft = [[1,1],[3,3],[3,1]], topRight = [[2,2],[4,4],[4,2]]\n输出:0\n解释:不存在相交的矩形,因此,返回 0 。\n\n\n
\n\n
提示:
\n\nn == bottomLeft.length == topRight.length
2 <= n <= 103
bottomLeft[i].length == topRight[i].length == 2
1 <= bottomLeft[i][0], bottomLeft[i][1] <= 107
1 <= topRight[i][0], topRight[i][1] <= 107
bottomLeft[i][0] < topRight[i][0]
bottomLeft[i][1] < topRight[i][1]
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