mirror of
https://gitee.com/coder-xiaomo/leetcode-problemset
synced 2025-11-04 19:53:12 +08:00
46 lines
2.4 KiB
HTML
46 lines
2.4 KiB
HTML
<p>You are a hiker preparing for an upcoming hike. You are given <code>heights</code>, a 2D array of size <code>rows x columns</code>, where <code>heights[row][col]</code> represents the height of cell <code>(row, col)</code>. You are situated in the top-left cell, <code>(0, 0)</code>, and you hope to travel to the bottom-right cell, <code>(rows-1, columns-1)</code> (i.e., <strong>0-indexed</strong>). You can move <strong>up</strong>, <strong>down</strong>, <strong>left</strong>, or <strong>right</strong>, and you wish to find a route that requires the minimum <strong>effort</strong>.</p>
|
|
|
|
<p>A route's <strong>effort</strong> is the <strong>maximum absolute difference</strong><strong> </strong>in heights between two consecutive cells of the route.</p>
|
|
|
|
<p>Return <em>the minimum <strong>effort</strong> required to travel from the top-left cell to the bottom-right cell.</em></p>
|
|
|
|
<p> </p>
|
|
<p><strong class="example">Example 1:</strong></p>
|
|
|
|
<p><img alt="" src="https://assets.leetcode.com/uploads/2020/10/04/ex1.png" style="width: 300px; height: 300px;" /></p>
|
|
|
|
<pre>
|
|
<strong>Input:</strong> heights = [[1,2,2],[3,8,2],[5,3,5]]
|
|
<strong>Output:</strong> 2
|
|
<strong>Explanation:</strong> The route of [1,3,5,3,5] has a maximum absolute difference of 2 in consecutive cells.
|
|
This is better than the route of [1,2,2,2,5], where the maximum absolute difference is 3.
|
|
</pre>
|
|
|
|
<p><strong class="example">Example 2:</strong></p>
|
|
|
|
<p><img alt="" src="https://assets.leetcode.com/uploads/2020/10/04/ex2.png" style="width: 300px; height: 300px;" /></p>
|
|
|
|
<pre>
|
|
<strong>Input:</strong> heights = [[1,2,3],[3,8,4],[5,3,5]]
|
|
<strong>Output:</strong> 1
|
|
<strong>Explanation:</strong> The route of [1,2,3,4,5] has a maximum absolute difference of 1 in consecutive cells, which is better than route [1,3,5,3,5].
|
|
</pre>
|
|
|
|
<p><strong class="example">Example 3:</strong></p>
|
|
<img alt="" src="https://assets.leetcode.com/uploads/2020/10/04/ex3.png" style="width: 300px; height: 300px;" />
|
|
<pre>
|
|
<strong>Input:</strong> heights = [[1,2,1,1,1],[1,2,1,2,1],[1,2,1,2,1],[1,2,1,2,1],[1,1,1,2,1]]
|
|
<strong>Output:</strong> 0
|
|
<strong>Explanation:</strong> This route does not require any effort.
|
|
</pre>
|
|
|
|
<p> </p>
|
|
<p><strong>Constraints:</strong></p>
|
|
|
|
<ul>
|
|
<li><code>rows == heights.length</code></li>
|
|
<li><code>columns == heights[i].length</code></li>
|
|
<li><code>1 <= rows, columns <= 100</code></li>
|
|
<li><code>1 <= heights[i][j] <= 10<sup>6</sup></code></li>
|
|
</ul>
|