leetcode-problemset/leetcode/originData/distinct-subsequences.json

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            "content": "<p>Given two strings <code>s</code> and <code>t</code>, return <em>the number of distinct subsequences of <code>s</code> which equals <code>t</code></em>.</p>\n\n<p>A string&#39;s <strong>subsequence</strong> is a new string formed from the original string by deleting some (can be none) of the characters without disturbing the remaining characters&#39; relative positions. (i.e., <code>&quot;ACE&quot;</code> is a subsequence of <code>&quot;ABCDE&quot;</code> while <code>&quot;AEC&quot;</code> is not).</p>\n\n<p>The test cases are generated so that the answer fits on a 32-bit signed integer.</p>\n\n<p>&nbsp;</p>\n<p><strong>Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> s = &quot;rabbbit&quot;, t = &quot;rabbit&quot;\n<strong>Output:</strong> 3\n<strong>Explanation:</strong>\nAs shown below, there are 3 ways you can generate &quot;rabbit&quot; from S.\n<code><strong><u>rabb</u></strong>b<strong><u>it</u></strong></code>\n<code><strong><u>ra</u></strong>b<strong><u>bbit</u></strong></code>\n<code><strong><u>rab</u></strong>b<strong><u>bit</u></strong></code>\n</pre>\n\n<p><strong>Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> s = &quot;babgbag&quot;, t = &quot;bag&quot;\n<strong>Output:</strong> 5\n<strong>Explanation:</strong>\nAs shown below, there are 5 ways you can generate &quot;bag&quot; from S.\n<code><strong><u>ba</u></strong>b<u><strong>g</strong></u>bag</code>\n<code><strong><u>ba</u></strong>bgba<strong><u>g</u></strong></code>\n<code><u><strong>b</strong></u>abgb<strong><u>ag</u></strong></code>\n<code>ba<u><strong>b</strong></u>gb<u><strong>ag</strong></u></code>\n<code>babg<strong><u>bag</u></strong></code></pre>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= s.length, t.length &lt;= 1000</code></li>\n\t<li><code>s</code> and <code>t</code> consist of English letters.</li>\n</ul>\n",
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