mirror of
https://gitee.com/coder-xiaomo/leetcode-problemset
synced 2025-01-10 18:48:13 +08:00
131 lines
3.9 KiB
HTML
131 lines
3.9 KiB
HTML
<p>给你一个二维 <code>3 x 3</code> 的矩阵 <code>grid</code> ，每个格子都是一个字符，要么是 <code>'B'</code> ，要么是 <code>'W'</code> 。字符 <code>'W'</code> 表示白色，字符 <code>'B'</code> 表示黑色。</p>
|
||
|
||
<p>你的任务是改变 <strong>至多一个</strong> 格子的颜色，使得矩阵中存在一个 <code>2 x 2</code> 颜色完全相同的正方形。<!-- notionvc: adf957e1-fa0f-40e5-9a2e-933b95e276a7 --></p>
|
||
|
||
<p>如果可以得到一个相同颜色的 <code>2 x 2</code> 正方形，那么返回 <code>true</code> ，否则返回 <code>false</code> 。</p>
|
||
|
||
<p> </p>
|
||
<style type="text/css">.grid-container {
|
||
display: grid;
|
||
grid-template-columns: 30px 30px 30px;
|
||
padding: 10px;
|
||
}
|
||
.grid-item {
|
||
background-color: black;
|
||
border: 1px solid gray;
|
||
height: 30px;
|
||
font-size: 30px;
|
||
text-align: center;
|
||
}
|
||
.grid-item-white {
|
||
background-color: white;
|
||
}
|
||
</style>
|
||
<style class="darkreader darkreader--sync" media="screen" type="text/css">
|
||
</style>
|
||
<p><strong class="example">示例 1：</strong></p>
|
||
|
||
<div class="grid-container">
|
||
<div class="grid-item"> </div>
|
||
|
||
<div class="grid-item grid-item-white"> </div>
|
||
|
||
<div class="grid-item"> </div>
|
||
|
||
<div class="grid-item"> </div>
|
||
|
||
<div class="grid-item grid-item-white"> </div>
|
||
|
||
<div class="grid-item grid-item-white"> </div>
|
||
|
||
<div class="grid-item"> </div>
|
||
|
||
<div class="grid-item grid-item-white"> </div>
|
||
|
||
<div class="grid-item"> </div>
|
||
</div>
|
||
|
||
<div class="example-block">
|
||
<p><span class="example-io"><b>输入：</b>grid = [["B","W","B"],["B","W","W"],["B","W","B"]]</span></p>
|
||
|
||
<p><span class="example-io"><b>输出：</b>true</span></p>
|
||
|
||
<p><strong>解释：</strong></p>
|
||
|
||
<p>修改 <code>grid[0][2]</code> 的颜色，可以满足要求。</p>
|
||
</div>
|
||
|
||
<p><strong class="example">示例 2：</strong></p>
|
||
|
||
<div class="grid-container">
|
||
<div class="grid-item"> </div>
|
||
|
||
<div class="grid-item grid-item-white"> </div>
|
||
|
||
<div class="grid-item"> </div>
|
||
|
||
<div class="grid-item grid-item-white"> </div>
|
||
|
||
<div class="grid-item"> </div>
|
||
|
||
<div class="grid-item grid-item-white"> </div>
|
||
|
||
<div class="grid-item"> </div>
|
||
|
||
<div class="grid-item grid-item-white"> </div>
|
||
|
||
<div class="grid-item"> </div>
|
||
</div>
|
||
|
||
<div class="example-block">
|
||
<p><span class="example-io"><b>输入：</b>grid = [["B","W","B"],["W","B","W"],["B","W","B"]]</span></p>
|
||
|
||
<p><span class="example-io"><b>输出：</b>false</span></p>
|
||
|
||
<p><strong>解释：</strong></p>
|
||
|
||
<p>只改变一个格子颜色无法满足要求。</p>
|
||
</div>
|
||
|
||
<p><strong class="example">示例 3：</strong></p>
|
||
|
||
<div class="grid-container">
|
||
<div class="grid-item"> </div>
|
||
|
||
<div class="grid-item grid-item-white"> </div>
|
||
|
||
<div class="grid-item"> </div>
|
||
|
||
<div class="grid-item"> </div>
|
||
|
||
<div class="grid-item grid-item-white"> </div>
|
||
|
||
<div class="grid-item grid-item-white"> </div>
|
||
|
||
<div class="grid-item"> </div>
|
||
|
||
<div class="grid-item grid-item-white"> </div>
|
||
|
||
<div class="grid-item grid-item-white"> </div>
|
||
</div>
|
||
|
||
<div class="example-block">
|
||
<p><span class="example-io"><b>输入：</b>grid = [["B","W","B"],["B","W","W"],["B","W","W"]]</span></p>
|
||
|
||
<p><span class="example-io"><b>输出：</b>true</span></p>
|
||
|
||
<p><strong>解释：</strong></p>
|
||
|
||
<p><code>grid</code> 已经包含一个 <code>2 x 2</code> 颜色相同的正方形了。<!-- notionvc: 9a8b2d3d-1e73-457a-abe0-c16af51ad5c2 --></p>
|
||
</div>
|
||
|
||
<p> </p>
|
||
|
||
<p><strong>提示：</strong></p>
|
||
|
||
<ul>
|
||
<li><code>grid.length == 3</code></li>
|
||
<li><code>grid[i].length == 3</code></li>
|
||
<li><code>grid[i][j]</code> 要么是 <code>'W'</code> ，要么是 <code>'B'</code> 。</li>
|
||
</ul>
|