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39 lines
2.5 KiB
HTML
39 lines
2.5 KiB
HTML
<p>You are given an <code>m x n</code> integer matrix <code>grid</code>, where <code>m</code> and <code>n</code> are both <strong>even</strong> integers, and an integer <code>k</code>.</p>
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<p>The matrix is composed of several layers, which is shown in the below image, where each color is its own layer:</p>
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<p><img alt="" src="https://assets.leetcode.com/uploads/2021/06/10/ringofgrid.png" style="width: 231px; height: 258px;" /></p>
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<p>A cyclic rotation of the matrix is done by cyclically rotating <strong>each layer</strong> in the matrix. To cyclically rotate a layer once, each element in the layer will take the place of the adjacent element in the <strong>counter-clockwise</strong> direction. An example rotation is shown below:</p>
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<img alt="" src="https://assets.leetcode.com/uploads/2021/06/22/explanation_grid.jpg" style="width: 500px; height: 268px;" />
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<p>Return <em>the matrix after applying </em><code>k</code> <em>cyclic rotations to it</em>.</p>
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<p> </p>
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<p><strong class="example">Example 1:</strong></p>
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<img alt="" src="https://assets.leetcode.com/uploads/2021/06/19/rod2.png" style="width: 421px; height: 191px;" />
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<pre>
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<strong>Input:</strong> grid = [[40,10],[30,20]], k = 1
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<strong>Output:</strong> [[10,20],[40,30]]
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<strong>Explanation:</strong> The figures above represent the grid at every state.
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</pre>
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<p><strong class="example">Example 2:</strong></p>
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<strong><img alt="" src="https://assets.leetcode.com/uploads/2021/06/10/ringofgrid5.png" style="width: 231px; height: 262px;" /></strong> <strong><img alt="" src="https://assets.leetcode.com/uploads/2021/06/10/ringofgrid6.png" style="width: 231px; height: 262px;" /></strong> <strong><img alt="" src="https://assets.leetcode.com/uploads/2021/06/10/ringofgrid7.png" style="width: 231px; height: 262px;" /></strong>
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<pre>
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<strong>Input:</strong> grid = [[1,2,3,4],[5,6,7,8],[9,10,11,12],[13,14,15,16]], k = 2
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<strong>Output:</strong> [[3,4,8,12],[2,11,10,16],[1,7,6,15],[5,9,13,14]]
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<strong>Explanation:</strong> The figures above represent the grid at every state.
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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 == grid.length</code></li>
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<li><code>n == grid[i].length</code></li>
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<li><code>2 <= m, n <= 50</code></li>
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<li>Both <code>m</code> and <code>n</code> are <strong>even</strong> integers.</li>
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<li><code>1 <= grid[i][j] <=<sup> </sup>5000</code></li>
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<li><code>1 <= k <= 10<sup>9</sup></code></li>
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</ul> |