mirror of
https://gitee.com/coder-xiaomo/leetcode-problemset
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186 lines
32 KiB
JSON
186 lines
32 KiB
JSON
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"questionId": "1041",
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"title": "Available Captures for Rook",
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"titleSlug": "available-captures-for-rook",
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"content": "<p>You are given an <code>8 x 8</code> <strong>matrix</strong> representing a chessboard. There is <strong>exactly one</strong> white rook represented by <code>'R'</code>, some number of white bishops <code>'B'</code>, and some number of black pawns <code>'p'</code>. Empty squares are represented by <code>'.'</code>.</p>\n\n<p>A rook can move any number of squares horizontally or vertically (up, down, left, right) until it reaches another piece <em>or</em> the edge of the board. A rook is <strong>attacking</strong> a pawn if it can move to the pawn's square in one move.</p>\n\n<p>Note: A rook cannot move through other pieces, such as bishops or pawns. This means a rook cannot attack a pawn if there is another piece blocking the path.</p>\n\n<p>Return the <strong>number of pawns</strong> the white rook is <strong>attacking</strong>.</p>\n\n<p> </p>\n<p><strong class=\"example\">Example 1:</strong></p>\n<img alt=\"\" src=\"https://assets.leetcode.com/uploads/2019/02/20/1253_example_1_improved.PNG\" style=\"width: 300px; height: 305px;\" />\n<div class=\"example-block\">\n<p><strong>Input:</strong> <span class=\"example-io\">board = [[".",".",".",".",".",".",".","."],[".",".",".","p",".",".",".","."],[".",".",".","R",".",".",".","p"],[".",".",".",".",".",".",".","."],[".",".",".",".",".",".",".","."],[".",".",".","p",".",".",".","."],[".",".",".",".",".",".",".","."],[".",".",".",".",".",".",".","."]]</span></p>\n\n<p><strong>Output:</strong> <span class=\"example-io\">3</span></p>\n\n<p><strong>Explanation:</strong></p>\n\n<p>In this example, the rook is attacking all the pawns.</p>\n</div>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n<img alt=\"\" src=\"https://assets.leetcode.com/uploads/2019/02/19/1253_example_2_improved.PNG\" style=\"width: 300px; height: 306px;\" />\n<div class=\"example-block\">\n<p><strong>Input:</strong> <span class=\"example-io\">board = [[".",".",".",".",".",".","."],[".","p","p","p","p","p",".","."],[".","p","p","B","p","p",".","."],[".","p","B","R","B","p",".","."],[".","p","p","B","p","p",".","."],[".","p","p","p","p","p",".","."],[".",".",".",".",".",".",".","."],[".",".",".",".",".",".",".","."]]</span></p>\n\n<p><strong>Output:</strong> <span class=\"example-io\">0</span></p>\n\n<p><strong>Explanation:</strong></p>\n\n<p>The bishops are blocking the rook from attacking any of the pawns.</p>\n</div>\n\n<p><strong class=\"example\">Example 3:</strong></p>\n<img alt=\"\" src=\"https://assets.leetcode.com/uploads/2019/02/20/1253_example_3_improved.PNG\" style=\"width: 300px; height: 305px;\" />\n<div class=\"example-block\">\n<p><strong>Input:</strong> <span class=\"example-io\">board = [[".",".",".",".",".",".",".","."],[".",".",".","p",".",".",".","."],[".",".",".","p",".",".",".","."],["p","p",".","R",".","p","B","."],[".",".",".",".",".",".",".","."],[".",".",".","B",".",".",".","."],[".",".",".","p",".",".",".","."],[".",".",".",".",".",".",".","."]]</span></p>\n\n<p><strong>Output:</strong> <span class=\"example-io\">3</span></p>\n\n<p><strong>Explanation:</strong></p>\n\n<p>The rook is attacking the pawns at positions b5, d6, and f5.</p>\n</div>\n\n<p> </p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>board.length == 8</code></li>\n\t<li><code>board[i].length == 8</code></li>\n\t<li><code>board[i][j]</code> is either <code>'R'</code>, <code>'.'</code>, <code>'B'</code>, or <code>'p'</code></li>\n\t<li>There is exactly one cell with <code>board[i][j] == 'R'</code></li>\n</ul>\n",
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"translatedTitle": "可以被一步捕获的棋子数",
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"translatedContent": "<p>给定一个 <code>8 x 8</code> 的棋盘，<strong>只有一个</strong> 白色的车，用字符 <code>'R'</code> 表示。棋盘上还可能存在白色的象 <code>'B'</code> 以及黑色的卒 <code>'p'</code>。空方块用字符 <code>'.'</code> 表示。</p>\n\n<p>车可以按水平或竖直方向（上，下，左，右）移动任意个方格直到它遇到另一个棋子或棋盘的边界。如果它能够在一次移动中移动到棋子的方格，则能够 <strong>吃掉</strong> 棋子。</p>\n\n<p>注意：车不能穿过其它棋子，比如象和卒。这意味着如果有其它棋子挡住了路径，车就不能够吃掉棋子。</p>\n\n<p>返回白车 <strong>攻击</strong> 范围内 <strong>兵的数量</strong>。</p>\n\n<p> </p>\n\n<p><strong>示例 1：</strong></p>\n\n<p><img alt=\"\" src=\"https://assets.leetcode-cn.com/aliyun-lc-upload/uploads/2019/02/23/1253_example_1_improved.PNG\" style=\"height: 305px; width: 300px;\" /></p>\n\n<pre>\n<strong>输入：</strong>[[\".\",\".\",\".\",\".\",\".\",\".\",\".\",\".\"],[\".\",\".\",\".\",\"p\",\".\",\".\",\".\",\".\"],[\".\",\".\",\".\",\"R\",\".\",\".\",\".\",\"p\"],[\".\",\".\",\".\",\".\",\".\",\".\",\".\",\".\"],[\".\",\".\",\".\",\".\",\".\",\".\",\".\",\".\"],[\".\",\".\",\".\",\"p\",\".\",\".\",\".\",\".\"],[\".\",\".\",\".\",\".\",\".\",\".\",\".\",\".\"],[\".\",\".\",\".\",\".\",\".\",\".\",\".\",\".\"]]\n<strong>输出：</strong>3\n<strong>解释：\n</strong>在本例中，车能够吃掉所有的卒。\n</pre>\n\n<p><strong>示例 2：</strong></p>\n\n<p><img alt=\"\" src=\"https://assets.leetcode-cn.com/aliyun-lc-upload/uploads/2019/02/23/1253_example_2_improved.PNG\" style=\"height: 306px; width: 300px;\" /></p>\n\n<pre>\n<strong>输入：</strong>[[\".\",\".\",\".\",\".\",\".\",\".\",\".\",\".\"],[\".\",\"p\",\"p\",\"p\",\"p\",\"p\",\".\",\".\"],[\".\",\"p\",\"p\",\"B\",\"p\",\"p\",\".\",\".\"],[\".\",\"p\",\"B\",\"R\",\"B\",\"p\",\".\",\".\"],[\".\",\"p\",\"p\",\"B\",\"p\",\"p\",\".\",\".\"],[\".\",\"p\",\"p\",\"p\",\"p\",\"p\",\".\",\".\"],[\".\",\".\",\".\",\".\",\".\",\".\",\".\",\".\"],[\".\",\".\",\".\",\".\",\".\",\".\",\".\",\".\"]]\n<strong>输出：</strong>0\n<strong>解释：\n</strong>象阻止了车吃掉任何卒。\n</pre>\n\n<p><strong>示例 3：</strong></p>\n\n<p><img alt=\"\" src=\"https://assets.leetcode-cn.com/aliyun-lc-upload/uploads/2019/02/23/1253_example_3_improved.PNG\" style=\"height: 305px; width: 300px;\" /></p>\n\n<pre>\n<strong>输入：</strong>[[\".\",\".\",\".\",\".\",\".\",\".\",\".\",\".\"],[\".\",\".\",\".\",\"p\",\".\",\".\",\".\",\".\"],[\".\",\".\",\".\",\"p\",\".\",\".\",\".\",\".\"],[\"p\",\"p\",\".\",\"R\",\".\",\"p\",\"B\",\".\"],[\".\",\".\",\".\",\".\",\".\",\".\",\".\",\".\"],[\".\",\".\",\".\",\"B\",\".\",\".\",\".\",\".\"],[\".\",\".\",\".\",\"p\",\".\",\".\",\".\",\".\"],[\".\",\".\",\".\",\".\",\".\",\".\",\".\",\".\"]]\n<strong>输出：</strong>3\n<strong>解释： </strong>\n车可以吃掉位置 b5，d6 和 f5 的卒。\n</pre>\n\n<p> </p>\n\n<p><strong>提示：</strong></p>\n\n<ol>\n\t<li><code>board.length == 8</code></li>\n\t<li><code>board[i].length == 8</code></li>\n\t<li><code>board[i][j]</code> 可以是 <code>'R'</code>，<code>'.'</code>，<code>'B'</code> 或 <code>'p'</code></li>\n\t<li>只有一个格子上存在 <code>board[i][j] == 'R'</code></li>\n</ol>\n",
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