{ "data": { "question": { "questionId": "3214", "questionFrontendId": "2943", "categoryTitle": "Algorithms", "boundTopicId": 2539398, "title": "Maximize Area of Square Hole in Grid", "titleSlug": "maximize-area-of-square-hole-in-grid", "content": "
You are given the two integers, n
and m
and two integer arrays, hBars
and vBars
. The grid has n + 2
horizontal and m + 2
vertical bars, creating 1 x 1 unit cells. The bars are indexed starting from 1
.
You can remove some of the bars in hBars
from horizontal bars and some of the bars in vBars
from vertical bars. Note that other bars are fixed and cannot be removed.
Return an integer denoting the maximum area of a square-shaped hole in the grid, after removing some bars (possibly none).
\n\n\n
Example 1:
\n\nInput: n = 2, m = 1, hBars = [2,3], vBars = [2]
\n\nOutput: 4
\n\nExplanation:
\n\nThe left image shows the initial grid formed by the bars. The horizontal bars are [1,2,3,4]
, and the vertical bars are [1,2,3]
.
One way to get the maximum square-shaped hole is by removing horizontal bar 2 and vertical bar 2.
\nExample 2:
\n\nInput: n = 1, m = 1, hBars = [2], vBars = [2]
\n\nOutput: 4
\n\nExplanation:
\n\nTo get the maximum square-shaped hole, we remove horizontal bar 2 and vertical bar 2.
\nExample 3:
\n\nInput: n = 2, m = 3, hBars = [2,3], vBars = [2,4]
\n\nOutput: 4
\n\nExplanation:
\n\nOne way to get the maximum square-shaped hole is by removing horizontal bar 3, and vertical bar 4.
\n\n
Constraints:
\n\n1 <= n <= 109
1 <= m <= 109
1 <= hBars.length <= 100
2 <= hBars[i] <= n + 1
1 <= vBars.length <= 100
2 <= vBars[i] <= m + 1
hBars
are distinct.vBars
are distinct.给你一个网格图,由 n + 2
条 横线段 和 m + 2
条 竖线段 组成,一开始所有区域均为 1 x 1
的单元格。
所有线段的编号从 1 开始。
\n\n给你两个整数 n
和 m
。
同时给你两个整数数组 hBars
和 vBars
。
hBars
包含区间 [2, n + 1]
内 互不相同 的横线段编号。vBars
包含 [2, m + 1]
内 互不相同的 竖线段编号。如果满足以下条件之一,你可以 移除 两个数组中的部分线段:
\n\nhBars
中的值。vBars
中的值。请你返回移除一些线段后(可能不移除任何线段),剩余网格图中 最大正方形 空洞的面积,正方形空洞的意思是正方形 内部 不含有任何线段。
\n\n\n\n
示例 1:
\n\n\n输入:n = 2, m = 1, hBars = [2,3], vBars = [2]\n输出:4\n解释:左边的图是一开始的网格图。\n横线编号的范围是区间 [1,4] ,竖线编号的范围是区间 [1,3] 。\n可以移除的横线段为 [2,3] ,竖线段为 [2] 。\n一种得到最大正方形面积的方法是移除横线段 2 和竖线段 2 。\n操作后得到的网格图如右图所示。\n正方形空洞面积为 4。\n无法得到面积大于 4 的正方形空洞。\n所以答案为 4 。\n\n\n
示例 2:
\n\n\n输入:n = 1, m = 1, hBars = [2], vBars = [2]\n输出:4\n解释:左边的图是一开始的网格图。\n横线编号的范围是区间 [1,3] ,竖线编号的范围是区间 [1,3] 。\n可以移除的横线段为 [2] ,竖线段为 [2] 。\n一种得到最大正方形面积的方法是移除横线段 2 和竖线段 2 。\n操作后得到的网格图如右图所示。\n正方形空洞面积为 4。\n无法得到面积大于 4 的正方形空洞。\n所以答案为 4 。\n\n\n
示例 3:
\n\n\n输入:n = 2, m = 3, hBars = [2,3], vBars = [2,3,4]\n输出:9\n解释:左边的图是一开始的网格图。\n横线编号的范围是区间 [1,4] ,竖线编号的范围是区间 [1,5] 。\n可以移除的横线段为 [2,3] ,竖线段为 [2,3,4] 。\n一种得到最大正方形面积的方法是移除横线段 2、3 和竖线段 3、4 。\n操作后得到的网格图如右图所示。\n正方形空洞面积为 9。\n无法得到面积大于 9 的正方形空洞。\n所以答案为 9 。\n\n\n
\n\n
提示:
\n\n1 <= n <= 109
1 <= m <= 109
1 <= hBars.length <= 100
2 <= hBars[i] <= n + 1
1 <= vBars.length <= 100
2 <= vBars[i] <= m + 1
hBars
中的值互不相同。vBars
中的值互不相同。hBars
and vBars
and consider them separately.",
"Compute the longest sequence of consecutive integer values in each array, denoted as [hx, hy]
and [vx, vy]
, respectively.",
"The maximum square length we can get is min(hy - hx + 2, vy - vx + 2)
.",
"Square the maximum square length to get the area."
],
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