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82 lines
3.2 KiB
HTML
82 lines
3.2 KiB
HTML
<p>请你实现一个类 <code>SubrectangleQueries</code> ，它的构造函数的参数是一个 <code>rows x cols</code> 的矩形（这里用整数矩阵表示），并支持以下两种操作：</p>
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<p>1.<code> updateSubrectangle(int row1, int col1, int row2, int col2, int newValue)</code></p>
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<ul>
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<li>用 <code>newValue</code> 更新以 <code>(row1,col1)</code> 为左上角且以 <code>(row2,col2)</code> 为右下角的子矩形。</li>
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</ul>
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<p>2.<code> getValue(int row, int col)</code></p>
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<ul>
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<li>返回矩形中坐标 <code>(row,col)</code> 的当前值。</li>
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</ul>
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<p> </p>
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<p><strong>示例 1：</strong></p>
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<pre><strong>输入：</strong>
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["SubrectangleQueries","getValue","updateSubrectangle","getValue","getValue","updateSubrectangle","getValue","getValue"]
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[[[[1,2,1],[4,3,4],[3,2,1],[1,1,1]]],[0,2],[0,0,3,2,5],[0,2],[3,1],[3,0,3,2,10],[3,1],[0,2]]
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<strong>输出：</strong>
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[null,1,null,5,5,null,10,5]
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<strong>解释：</strong>
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SubrectangleQueries subrectangleQueries = new SubrectangleQueries([[1,2,1],[4,3,4],[3,2,1],[1,1,1]]);
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// 初始的 (4x3) 矩形如下：
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// 1 2 1
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// 4 3 4
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// 3 2 1
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// 1 1 1
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subrectangleQueries.getValue(0, 2); // 返回 1
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subrectangleQueries.updateSubrectangle(0, 0, 3, 2, 5);
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// 此次更新后矩形变为：
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// 5 5 5
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// 5 5 5
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// 5 5 5
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// 5 5 5
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subrectangleQueries.getValue(0, 2); // 返回 5
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subrectangleQueries.getValue(3, 1); // 返回 5
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subrectangleQueries.updateSubrectangle(3, 0, 3, 2, 10);
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// 此次更新后矩形变为：
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// 5 5 5
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// 5 5 5
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// 5 5 5
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// 10 10 10
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subrectangleQueries.getValue(3, 1); // 返回 10
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subrectangleQueries.getValue(0, 2); // 返回 5
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</pre>
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<p><strong>示例 2：</strong></p>
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<pre><strong>输入：</strong>
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["SubrectangleQueries","getValue","updateSubrectangle","getValue","getValue","updateSubrectangle","getValue"]
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[[[[1,1,1],[2,2,2],[3,3,3]]],[0,0],[0,0,2,2,100],[0,0],[2,2],[1,1,2,2,20],[2,2]]
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<strong>输出：</strong>
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[null,1,null,100,100,null,20]
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<strong>解释：</strong>
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SubrectangleQueries subrectangleQueries = new SubrectangleQueries([[1,1,1],[2,2,2],[3,3,3]]);
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subrectangleQueries.getValue(0, 0); // 返回 1
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subrectangleQueries.updateSubrectangle(0, 0, 2, 2, 100);
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subrectangleQueries.getValue(0, 0); // 返回 100
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subrectangleQueries.getValue(2, 2); // 返回 100
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subrectangleQueries.updateSubrectangle(1, 1, 2, 2, 20);
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subrectangleQueries.getValue(2, 2); // 返回 20
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</pre>
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<p> </p>
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<p><strong>提示：</strong></p>
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<ul>
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<li>最多有 <code>500</code> 次<code>updateSubrectangle</code> 和 <code>getValue</code> 操作。</li>
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<li><code>1 <= rows, cols <= 100</code></li>
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<li><code>rows == rectangle.length</code></li>
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<li><code>cols == rectangle[i].length</code></li>
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<li><code>0 <= row1 <= row2 < rows</code></li>
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<li><code>0 <= col1 <= col2 < cols</code></li>
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<li><code>1 <= newValue, rectangle[i][j] <= 10^9</code></li>
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<li><code>0 <= row < rows</code></li>
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<li><code>0 <= col < cols</code></li>
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</ul>
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