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38 lines
1.5 KiB
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38 lines
1.5 KiB
HTML
<p>Given an <code>m x n</code> integers <code>matrix</code>, return <em>the length of the longest increasing path in </em><code>matrix</code>.</p>
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<p>From each cell, you can either move in four directions: left, right, up, or down. You <strong>may not</strong> move <strong>diagonally</strong> or move <strong>outside the boundary</strong> (i.e., wrap-around is not allowed).</p>
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<p> </p>
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<p><strong>Example 1:</strong></p>
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<img alt="" src="https://assets.leetcode.com/uploads/2021/01/05/grid1.jpg" style="width: 242px; height: 242px;" />
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<pre>
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<strong>Input:</strong> matrix = [[9,9,4],[6,6,8],[2,1,1]]
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<strong>Output:</strong> 4
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<strong>Explanation:</strong> The longest increasing path is <code>[1, 2, 6, 9]</code>.
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</pre>
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<p><strong>Example 2:</strong></p>
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<img alt="" src="https://assets.leetcode.com/uploads/2021/01/27/tmp-grid.jpg" style="width: 253px; height: 253px;" />
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<pre>
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<strong>Input:</strong> matrix = [[3,4,5],[3,2,6],[2,2,1]]
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<strong>Output:</strong> 4
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<strong>Explanation: </strong>The longest increasing path is <code>[3, 4, 5, 6]</code>. Moving diagonally is not allowed.
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</pre>
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<p><strong>Example 3:</strong></p>
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<pre>
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<strong>Input:</strong> matrix = [[1]]
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<strong>Output:</strong> 1
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</pre>
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<p> </p>
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<p><strong>Constraints:</strong></p>
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<ul>
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<li><code>m == matrix.length</code></li>
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<li><code>n == matrix[i].length</code></li>
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<li><code>1 <= m, n <= 200</code></li>
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<li><code>0 <= matrix[i][j] <= 2<sup>31</sup> - 1</code></li>
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</ul>
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