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49 lines
2.5 KiB
HTML
49 lines
2.5 KiB
HTML
<p>On an <strong>8x8</strong> chessboard, there can be multiple Black Queens and one White King.</p>
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<p>Given an array of integer coordinates <code>queens</code> that represents the positions of the Black Queens, and a pair of coordinates <code>king</code> that represent the position of the White King, return the coordinates of all the queens (in any order) that can attack the King.</p>
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<p> </p>
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<p><strong>Example 1:</strong></p>
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<p><img alt="" src="https://assets.leetcode.com/uploads/2019/10/01/untitled-diagram.jpg" style="width: 321px; height: 321px;" /></p>
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<pre>
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<strong>Input:</strong> queens = [[0,1],[1,0],[4,0],[0,4],[3,3],[2,4]], king = [0,0]
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<strong>Output:</strong> [[0,1],[1,0],[3,3]]
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<strong>Explanation:</strong>
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The queen at [0,1] can attack the king cause they're in the same row.
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The queen at [1,0] can attack the king cause they're in the same column.
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The queen at [3,3] can attack the king cause they're in the same diagnal.
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The queen at [0,4] can't attack the king cause it's blocked by the queen at [0,1].
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The queen at [4,0] can't attack the king cause it's blocked by the queen at [1,0].
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The queen at [2,4] can't attack the king cause it's not in the same row/column/diagnal as the king.
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</pre>
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<p><strong>Example 2:</strong></p>
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<p><strong><img alt="" src="https://assets.leetcode.com/uploads/2019/10/01/untitled-diagram-1.jpg" style="width: 321px; height: 321px;" /></strong></p>
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<pre>
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<strong>Input:</strong> queens = [[0,0],[1,1],[2,2],[3,4],[3,5],[4,4],[4,5]], king = [3,3]
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<strong>Output:</strong> [[2,2],[3,4],[4,4]]
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</pre>
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<p><strong>Example 3:</strong></p>
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<p><strong><img alt="" src="https://assets.leetcode.com/uploads/2019/10/01/untitled-diagram-2.jpg" style="width: 321px; height: 321px;" /></strong></p>
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<pre>
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<strong>Input:</strong> queens = [[5,6],[7,7],[2,1],[0,7],[1,6],[5,1],[3,7],[0,3],[4,0],[1,2],[6,3],[5,0],[0,4],[2,2],[1,1],[6,4],[5,4],[0,0],[2,6],[4,5],[5,2],[1,4],[7,5],[2,3],[0,5],[4,2],[1,0],[2,7],[0,1],[4,6],[6,1],[0,6],[4,3],[1,7]], king = [3,4]
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<strong>Output:</strong> [[2,3],[1,4],[1,6],[3,7],[4,3],[5,4],[4,5]]
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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>1 <= queens.length <= 63</code></li>
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<li><code>queens[i].length == 2</code></li>
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<li><code>0 <= queens[i][j] < 8</code></li>
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<li><code>king.length == 2</code></li>
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<li><code>0 <= king[0], king[1] < 8</code></li>
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<li>At most one piece is allowed in a cell.</li>
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</ul>
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