{ "data": { "question": { "questionId": "3398", "questionFrontendId": "3127", "categoryTitle": "Algorithms", "boundTopicId": 2755098, "title": "Make a Square with the Same Color", "titleSlug": "make-a-square-with-the-same-color", "content": "
You are given a 2D matrix grid of size 3 x 3 consisting only of characters 'B' and 'W'. Character 'W' represents the white color, and character 'B' represents the black color.
Your task is to change the color of at most one cell so that the matrix has a 2 x 2 square where all cells are of the same color.
Return true if it is possible to create a 2 x 2 square of the same color, otherwise, return false.
\n\n\n
Example 1:
\n\nInput: grid = [["B","W","B"],["B","W","W"],["B","W","B"]]
\n\nOutput: true
\n\nExplanation:
\n\nIt can be done by changing the color of the grid[0][2].
Example 2:
\n\nInput: grid = [["B","W","B"],["W","B","W"],["B","W","B"]]
\n\nOutput: false
\n\nExplanation:
\n\nIt cannot be done by changing at most one cell.
\nExample 3:
\n\nInput: grid = [["B","W","B"],["B","W","W"],["B","W","W"]]
\n\nOutput: true
\n\nExplanation:
\n\nThe grid already contains a 2 x 2 square of the same color.
\n
Constraints:
\n\ngrid.length == 3grid[i].length == 3grid[i][j] is either 'W' or 'B'.给你一个二维 3 x 3 的矩阵 grid ,每个格子都是一个字符,要么是 'B' ,要么是 'W' 。字符 'W' 表示白色,字符 'B' 表示黑色。
你的任务是改变 至多一个 格子的颜色,使得矩阵中存在一个 2 x 2 颜色完全相同的正方形。
如果可以得到一个相同颜色的 2 x 2 正方形,那么返回 true ,否则返回 false 。
\n\n\n
示例 1:
\n\n输入:grid = [[\"B\",\"W\",\"B\"],[\"B\",\"W\",\"W\"],[\"B\",\"W\",\"B\"]]
\n\n输出:true
\n\n解释:
\n\n修改 grid[0][2] 的颜色,可以满足要求。
示例 2:
\n\n输入:grid = [[\"B\",\"W\",\"B\"],[\"W\",\"B\",\"W\"],[\"B\",\"W\",\"B\"]]
\n\n输出:false
\n\n解释:
\n\n只改变一个格子颜色无法满足要求。
\n示例 3:
\n\n输入:grid = [[\"B\",\"W\",\"B\"],[\"B\",\"W\",\"W\"],[\"B\",\"W\",\"W\"]]
\n\n输出:true
\n\n解释:
\n\ngrid 已经包含一个 2 x 2 颜色相同的正方形了。
\n\n
提示:
\n\ngrid.length == 3grid[i].length == 3grid[i][j] 要么是 'W' ,要么是 'B' 。2 x 2 square with the same color by changing the color of at most one cell when the number of ‘W' or 'B’ in all squares is 2."
],
"solution": null,
"status": null,
"sampleTestCase": "[[\"B\",\"W\",\"B\"],[\"B\",\"W\",\"W\"],[\"B\",\"W\",\"B\"]]",
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