leetcode-problemset/leetcode-cn/originData/robot-in-a-grid-lcci.json

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            "questionId": "1000011",
            "questionFrontendId": "面试题 08.02",
            "categoryTitle": "LCCI",
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            "title": "Robot in a Grid LCCI",
            "titleSlug": "robot-in-a-grid-lcci",
            "content": "<p>Imagine a robot sitting on the upper left corner of grid with r rows and c columns. The robot can only move in two directions, right and down, but certain cells are &quot;off limits&quot; such that the robot cannot step on them. Design an algorithm to find a path for the robot from the top left to the bottom right.</p>\r\n\r\n<p><img src=\"https://assets.leetcode-cn.com/aliyun-lc-upload/uploads/2018/10/22/robot_maze.png\" style=\"height: 183px; width: 400px;\" /></p>\r\n\r\n<p>&quot;off limits&quot; and empty grid are represented by&nbsp;<code>1</code> and&nbsp;<code>0</code>&nbsp;respectively.</p>\r\n\r\n<p>Return a valid path, consisting of row number and column number of grids in the path.</p>\r\n\r\n<p><strong>Example&nbsp;1:</strong></p>\r\n\r\n<pre>\r\n<strong>Input:\r\n</strong>[\r\n&nbsp; [<strong>0</strong>,<strong>0</strong>,<strong>0</strong>],\r\n&nbsp; [0,1,<strong>0</strong>],\r\n&nbsp; [0,0,<strong>0</strong>]\r\n]\r\n<strong>Output:</strong> [[0,0],[0,1],[0,2],[1,2],[2,2]]</pre>\r\n\r\n<p><strong>Note: </strong></p>\r\n\r\n<ul>\r\n\t<li><code>r,&nbsp;c &lt;= 100</code></li>\r\n</ul>\r\n",
            "translatedTitle": "迷路的机器人",
            "translatedContent": "<p>设想有个机器人坐在一个网格的左上角，网格 r 行 c 列。机器人只能向下或向右移动，但不能走到一些被禁止的网格（有障碍物）。设计一种算法，寻找机器人从左上角移动到右下角的路径。</p>\n\n<p><img src=\"https://assets.leetcode-cn.com/aliyun-lc-upload/uploads/2018/10/22/robot_maze.png\" style=\"height: 183px; width: 400px;\"></p>\n\n<p>网格中的障碍物和空位置分别用 <code>1</code> 和 <code>0</code> 来表示。</p>\n\n<p>返回一条可行的路径，路径由经过的网格的行号和列号组成。左上角为 0 行 0 列。如果没有可行的路径，返回空数组。</p>\n\n<p><strong>示例&nbsp;1:</strong></p>\n\n<pre><strong>输入:\n</strong>[\n&nbsp; [<strong>0</strong>,<strong>0</strong>,<strong>0</strong>],\n&nbsp; [0,1,<strong>0</strong>],\n&nbsp; [0,0,<strong>0</strong>]\n]\n<strong>输出:</strong> [[0,0],[0,1],[0,2],[1,2],[2,2]]\n<strong>解释: \n</strong>输入中标粗的位置即为输出表示的路径，即\n0行0列（左上角） -&gt; 0行1列 -&gt; 0行2列 -&gt; 1行2列 -&gt; 2行2列（右下角）</pre>\n\n<p><strong>说明：</strong><em>r</em>&nbsp;和 <em>c </em>的值均不超过 100。</p>\n",
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            "hints": [
                "为了让机器人到最后一个格子，必须找出到倒数第二个格子的路径。为了到倒数第二个格子，必须找出到倒数第三个格子的路径。",
                "首先明确是否有路径，以便稍微简化这个问题。然后，修改你的算法跟踪路径。",
                "再考虑一下你算法的效率。你能优化它吗？"
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