leetcode-problemset/leetcode-cn/originData/decode-ways.json

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            "title": "Decode Ways",
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            "content": "<p>You have intercepted a secret message encoded as a string of numbers. The message is <strong>decoded</strong> via the following mapping:</p>\n\n<p><code>&quot;1&quot; -&gt; &#39;A&#39;<br />\n&quot;2&quot; -&gt; &#39;B&#39;<br />\n...<br />\n&quot;25&quot; -&gt; &#39;Y&#39;<br />\n&quot;26&quot; -&gt; &#39;Z&#39;</code></p>\n\n<p>However, while decoding the message, you realize that there are many different ways you can decode the message because some codes are contained in other codes (<code>&quot;2&quot;</code> and <code>&quot;5&quot;</code> vs <code>&quot;25&quot;</code>).</p>\n\n<p>For example, <code>&quot;11106&quot;</code> can be decoded into:</p>\n\n<ul>\n\t<li><code>&quot;AAJF&quot;</code> with the grouping <code>(1, 1, 10, 6)</code></li>\n\t<li><code>&quot;KJF&quot;</code> with the grouping <code>(11, 10, 6)</code></li>\n\t<li>The grouping <code>(1, 11, 06)</code> is invalid because <code>&quot;06&quot;</code> is not a valid code (only <code>&quot;6&quot;</code> is valid).</li>\n</ul>\n\n<p>Note: there may be strings that are impossible to decode.<br />\n<br />\nGiven a string s containing only digits, return the <strong>number of ways</strong> to <strong>decode</strong> it. If the entire string cannot be decoded in any valid way, return <code>0</code>.</p>\n\n<p>The test cases are generated so that the answer fits in a <strong>32-bit</strong> integer.</p>\n\n<p>&nbsp;</p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<div class=\"example-block\">\n<p><strong>Input:</strong> <span class=\"example-io\">s = &quot;12&quot;</span></p>\n\n<p><strong>Output:</strong> <span class=\"example-io\">2</span></p>\n\n<p><strong>Explanation:</strong></p>\n\n<p>&quot;12&quot; could be decoded as &quot;AB&quot; (1 2) or &quot;L&quot; (12).</p>\n</div>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<div class=\"example-block\">\n<p><strong>Input:</strong> <span class=\"example-io\">s = &quot;226&quot;</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>&quot;226&quot; could be decoded as &quot;BZ&quot; (2 26), &quot;VF&quot; (22 6), or &quot;BBF&quot; (2 2 6).</p>\n</div>\n\n<p><strong class=\"example\">Example 3:</strong></p>\n\n<div class=\"example-block\">\n<p><strong>Input:</strong> <span class=\"example-io\">s = &quot;06&quot;</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>&quot;06&quot; cannot be mapped to &quot;F&quot; because of the leading zero (&quot;6&quot; is different from &quot;06&quot;). In this case, the string is not a valid encoding, so return 0.</p>\n</div>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= s.length &lt;= 100</code></li>\n\t<li><code>s</code> contains only digits and may contain leading zero(s).</li>\n</ul>\n",
            "translatedTitle": "解码方法",
            "translatedContent": "<p>一条包含字母&nbsp;<code>A-Z</code> 的消息通过以下映射进行了 <strong>编码</strong> ：</p>\n\n<p><code>\"1\" -&gt; 'A'<br />\n\"2\" -&gt; 'B'<br />\n...<br />\n\"25\" -&gt; 'Y'<br />\n\"26\" -&gt; 'Z'</code></p>\n\n<p>然而，在&nbsp;<strong>解码</strong> 已编码的消息时，你意识到有许多不同的方式来解码，因为有些编码被包含在其它编码当中（<code>\"2\"</code> 和 <code>\"5\"</code> 与 <code>\"25\"</code>）。</p>\n\n<p>例如，<code>\"11106\"</code> 可以映射为：</p>\n\n<ul>\n\t<li><code>\"AAJF\"</code> ，将消息分组为 <code>(1, 1, 10, 6)</code></li>\n\t<li><code>\"KJF\"</code> ，将消息分组为 <code>(11, 10, 6)</code></li>\n\t<li>消息不能分组为&nbsp; <code>(1, 11, 06)</code> ，因为 <code>\"06\"</code>&nbsp;不是一个合法编码（只有 \"6\" 是合法的）。</li>\n</ul>\n\n<p>注意，可能存在无法解码的字符串。</p>\n\n<p>给你一个只含数字的 <strong>非空 </strong>字符串 <code>s</code> ，请计算并返回 <strong>解码</strong> 方法的 <strong>总数</strong> 。如果没有合法的方式解码整个字符串，返回 <code>0</code>。</p>\n\n<p>题目数据保证答案肯定是一个 <strong>32 位</strong> 的整数。</p>\n\n<p>&nbsp;</p>\n\n<p><strong>示例 1：</strong></p>\n\n<pre>\n<strong>输入：</strong>s = \"12\"\n<strong>输出：</strong>2\n<strong>解释：</strong>它可以解码为 \"AB\"（1 2）或者 \"L\"（12）。\n</pre>\n\n<p><strong>示例 2：</strong></p>\n\n<pre>\n<strong>输入：</strong>s = \"226\"\n<strong>输出：</strong>3\n<strong>解释：</strong>它可以解码为 \"BZ\" (2 26), \"VF\" (22 6), 或者 \"BBF\" (2 2 6) 。\n</pre>\n\n<p><strong>示例 3：</strong></p>\n\n<pre>\n<strong>输入：</strong>s = \"06\"\n<strong>输出：</strong>0\n<strong>解释：</strong>\"06\" 无法映射到 \"F\" ，因为存在前导零（\"6\" 和 \"06\" 并不等价）。\n</pre>\n\n<p>&nbsp;</p>\n\n<p><strong>提示：</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= s.length &lt;= 100</code></li>\n\t<li><code>s</code> 只包含数字，并且可能包含前导零。</li>\n</ul>\n",
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