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66 lines
2.5 KiB
HTML
66 lines
2.5 KiB
HTML
<p>You are given a 2D matrix <code>grid</code> of size <code>m x n</code>. In one <strong>operation</strong>, you can change the value of <strong>any</strong> cell to <strong>any</strong> non-negative number. You need to perform some <strong>operations</strong> such that each cell <code>grid[i][j]</code> is:</p>
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<ul>
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<li>Equal to the cell below it, i.e. <code>grid[i][j] == grid[i + 1][j]</code> (if it exists).</li>
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<li>Different from the cell to its right, i.e. <code>grid[i][j] != grid[i][j + 1]</code> (if it exists).</li>
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</ul>
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<p>Return the <strong>minimum</strong> number of operations needed.</p>
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<p> </p>
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<p><strong class="example">Example 1:</strong></p>
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<div class="example-block">
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<p><strong>Input:</strong> <span class="example-io">grid = [[1,0,2],[1,0,2]]</span></p>
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<p><strong>Output:</strong> 0</p>
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<p><strong>Explanation:</strong></p>
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<p><strong><img alt="" src="https://assets.leetcode.com/uploads/2024/04/15/examplechanged.png" style="width: 254px; height: 186px;padding: 10px; background: #fff; border-radius: .5rem;" /></strong></p>
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<p>All the cells in the matrix already satisfy the properties.</p>
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</div>
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<p><strong class="example">Example 2:</strong></p>
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<div class="example-block">
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<p><strong>Input:</strong> <span class="example-io">grid = [[1,1,1],[0,0,0]]</span></p>
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<p><strong>Output:</strong> 3</p>
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<p><strong>Explanation:</strong></p>
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<p><strong><img alt="" src="https://assets.leetcode.com/uploads/2024/03/27/example21.png" style="width: 254px; height: 186px;padding: 10px; background: #fff; border-radius: .5rem;" /></strong></p>
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<p>The matrix becomes <code>[[1,0,1],[1,0,1]]</code> which satisfies the properties, by doing these 3 operations:</p>
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<ul>
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<li>Change <code>grid[1][0]</code> to 1.</li>
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<li>Change <code>grid[0][1]</code> to 0.</li>
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<li>Change <code>grid[1][2]</code> to 1.</li>
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</ul>
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</div>
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<p><strong class="example">Example 3:</strong></p>
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<div class="example-block">
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<p><strong>Input:</strong> <span class="example-io">grid = [[1],[2],[3]]</span></p>
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<p><strong>Output:</strong> 2</p>
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<p><strong>Explanation:</strong></p>
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<p><img alt="" src="https://assets.leetcode.com/uploads/2024/03/31/changed.png" style="width: 86px; height: 277px;padding: 10px; background: #fff; border-radius: .5rem;" /></p>
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<p>There is a single column. We can change the value to 1 in each cell using 2 operations.</p>
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</div>
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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>1 <= n, m <= 1000</code></li>
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<li><code>0 <= grid[i][j] <= 9</code></li>
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</ul>
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