leetcode-problemset/leetcode-cn/originData/alphabet-board-path.json

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        "question": {
            "questionId": "1238",
            "questionFrontendId": "1138",
            "categoryTitle": "Algorithms",
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            "title": "Alphabet Board Path",
            "titleSlug": "alphabet-board-path",
            "content": "<p>On an alphabet board, we start at position <code>(0, 0)</code>, corresponding to character&nbsp;<code>board[0][0]</code>.</p>\r\n\r\n<p>Here, <code>board = [&quot;abcde&quot;, &quot;fghij&quot;, &quot;klmno&quot;, &quot;pqrst&quot;, &quot;uvwxy&quot;, &quot;z&quot;]</code>, as shown in the diagram below.</p>\r\n\r\n<p><img alt=\"\" src=\"https://assets.leetcode.com/uploads/2019/07/28/azboard.png\" style=\"width: 250px; height: 317px;\" /></p>\r\n\r\n<p>We may make the following moves:</p>\r\n\r\n<ul>\r\n\t<li><code>&#39;U&#39;</code> moves our position up one row, if the position exists on the board;</li>\r\n\t<li><code>&#39;D&#39;</code> moves our position down one row, if the position exists on the board;</li>\r\n\t<li><code>&#39;L&#39;</code> moves our position left one column, if the position exists on the board;</li>\r\n\t<li><code>&#39;R&#39;</code> moves our position right one column, if the position exists on the board;</li>\r\n\t<li><code>&#39;!&#39;</code>&nbsp;adds the character <code>board[r][c]</code> at our current position <code>(r, c)</code>&nbsp;to the&nbsp;answer.</li>\r\n</ul>\r\n\r\n<p>(Here, the only positions that exist on the board are positions with letters on them.)</p>\r\n\r\n<p>Return a sequence of moves that makes our answer equal to <code>target</code>&nbsp;in the minimum number of moves.&nbsp; You may return any path that does so.</p>\r\n\r\n<p>&nbsp;</p>\r\n<p><strong>Example 1:</strong></p>\r\n<pre><strong>Input:</strong> target = \"leet\"\r\n<strong>Output:</strong> \"DDR!UURRR!!DDD!\"\r\n</pre><p><strong>Example 2:</strong></p>\r\n<pre><strong>Input:</strong> target = \"code\"\r\n<strong>Output:</strong> \"RR!DDRR!UUL!R!\"\r\n</pre>\r\n<p>&nbsp;</p>\r\n<p><strong>Constraints:</strong></p>\r\n\r\n<ul>\r\n\t<li><code>1 &lt;= target.length &lt;= 100</code></li>\r\n\t<li><code>target</code> consists only of English lowercase letters.</li>\r\n</ul>",
            "translatedTitle": "字母板上的路径",
            "translatedContent": "<p>我们从一块字母板上的位置&nbsp;<code>(0, 0)</code>&nbsp;出发，该坐标对应的字符为&nbsp;<code>board[0][0]</code>。</p>\n\n<p>在本题里，字母板为<code>board = [\"abcde\", \"fghij\", \"klmno\", \"pqrst\", \"uvwxy\", \"z\"]</code>，如下所示。</p>\n\n<p><img alt=\"\" src=\"https://assets.leetcode.com/uploads/2019/07/28/azboard.png\" style=\"width: 300px;\" /></p>\n\n<p>我们可以按下面的指令规则行动：</p>\n\n<ul>\n\t<li>如果方格存在，<code>'U'</code>&nbsp;意味着将我们的位置上移一行；</li>\n\t<li>如果方格存在，<code>'D'</code>&nbsp;意味着将我们的位置下移一行；</li>\n\t<li>如果方格存在，<code>'L'</code>&nbsp;意味着将我们的位置左移一列；</li>\n\t<li>如果方格存在，<code>'R'</code>&nbsp;意味着将我们的位置右移一列；</li>\n\t<li><code>'!'</code>&nbsp;会把在我们当前位置 <code>(r, c)</code> 的字符&nbsp;<code>board[r][c]</code>&nbsp;添加到答案中。</li>\n</ul>\n\n<p>（注意，字母板上只存在有字母的位置。）</p>\n\n<p>返回指令序列，用最小的行动次数让答案和目标&nbsp;<code>target</code>&nbsp;相同。你可以返回任何达成目标的路径。</p>\n\n<p>&nbsp;</p>\n\n<p><strong>示例 1：</strong></p>\n\n<pre>\n<strong>输入：</strong>target = \"leet\"\n<strong>输出：</strong>\"DDR!UURRR!!DDD!\"\n</pre>\n\n<p><strong>示例 2：</strong></p>\n\n<pre>\n<strong>输入：</strong>target = \"code\"\n<strong>输出：</strong>\"RR!DDRR!UUL!R!\"\n</pre>\n\n<p>&nbsp;</p>\n\n<p><strong>提示：</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= target.length &lt;= 100</code></li>\n\t<li><code>target</code>&nbsp;仅含有小写英文字母。</li>\n</ul>\n",
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                "Create a hashmap from letter to position on the board.",
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