leetcode-problemset/leetcode-cn/originData/find-maximum-number-of-non-intersecting-substrings.json

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        "question": {
            "questionId": "3857",
            "questionFrontendId": "3557",
            "categoryTitle": "Algorithms",
            "boundTopicId": 3683563,
            "title": "Find Maximum Number of Non Intersecting Substrings",
            "titleSlug": "find-maximum-number-of-non-intersecting-substrings",
            "content": "<p>You are given a string <code>word</code>.</p>\n\n<p>Return the <strong>maximum</strong> number of non-intersecting <strong>substrings</strong> of word that are at <strong>least</strong> four characters long and start and end with the same letter.</p>\n\n<p>A <strong>substring</strong> is a contiguous <b>non-empty</b> sequence of characters within a string.</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\">word = &quot;abcdeafdef&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>The two substrings are <code>&quot;abcdea&quot;</code> and <code>&quot;fdef&quot;</code>.</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\">word = &quot;bcdaaaab&quot;</span></p>\n\n<p><strong>Output:</strong> <span class=\"example-io\">1</span></p>\n\n<p><strong>Explanation:</strong></p>\n\n<p>The only substring is <code>&quot;aaaa&quot;</code>. Note that we cannot <strong>also</strong> choose <code>&quot;bcdaaaab&quot;</code> since it intersects with the other substring.</p>\n</div>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= word.length &lt;= 2 * 10<sup>5</sup></code></li>\n\t<li><code>word</code> consists only of lowercase English letters.</li>\n</ul>\n",
            "translatedTitle": "不相交子字符串的最大数量",
            "translatedContent": "<p>给你一个字符串 <code>word</code>。</p>\n\n<p>返回以&nbsp;<strong>首尾字母相同&nbsp;</strong>且&nbsp;<strong>长度至少为 4&nbsp;</strong>的&nbsp;<strong>不相交子字符串&nbsp;</strong>的最大数量。</p>\n\n<p><strong>子字符串&nbsp;</strong>是字符串中连续的&nbsp;<b>非空&nbsp;</b>字符序列。</p>\n\n<p>&nbsp;</p>\n\n<p><strong class=\"example\">示例 1：</strong></p>\n\n<div class=\"example-block\">\n<p><strong>输入：</strong> <span class=\"example-io\">word = \"abcdeafdef\"</span></p>\n\n<p><strong>输出：</strong> <span class=\"example-io\">2</span></p>\n\n<p><strong>解释：</strong></p>\n\n<p>两个子字符串是 <code>\"abcdea\"</code> 和 <code>\"fdef\"</code>。</p>\n</div>\n\n<p><strong class=\"example\">示例 2：</strong></p>\n\n<div class=\"example-block\">\n<p><strong>输入：</strong> <span class=\"example-io\">word = \"bcdaaaab\"</span></p>\n\n<p><strong>输出：</strong> <span class=\"example-io\">1</span></p>\n\n<p><strong>解释：</strong></p>\n\n<p>唯一的子字符串是 <code>\"aaaa\"</code>。注意我们&nbsp;<strong>不能&nbsp;</strong>同时选择 <code>\"bcdaaaab\"</code>，因为它和另一个子字符串有重叠。</p>\n</div>\n\n<p>&nbsp;</p>\n\n<p><strong>提示：</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= word.length &lt;= 2 * 10<sup>5</sup></code></li>\n\t<li><code>word</code> 仅由小写英文字母组成。</li>\n</ul>\n",
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            "hints": [
                "Can we solve the problem using Dynamic Programming?",
                "For each character <code>c</code>, store all occurrence indices in order",
                "At each position <code>i</code>, let <code>j</code> be the first index of <code>word[i]</code>; if <code>i - j >= 3</code>, we can form substring <code>[j, i]</code>",
                "For each index, also store the maximum for <b>any</b> substring ending before that index in the dp."
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