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37 lines
1.3 KiB
HTML
37 lines
1.3 KiB
HTML
<p>You are given a string <code>word</code>.</p>
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<p>Return the <strong>maximum</strong> number of non-intersecting <strong><span data-keyword="substring-nonempty">substrings</span></strong> of word that are at <strong>least</strong> four characters long and start and end with the same letter.</p>
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<p> </p>
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<p><strong class="example">Example 1:</strong></p>
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<div class="example-block">
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<p><strong>Input:</strong> <span class="example-io">word = "abcdeafdef"</span></p>
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<p><strong>Output:</strong> <span class="example-io">2</span></p>
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<p><strong>Explanation:</strong></p>
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<p>The two substrings are <code>"abcdea"</code> and <code>"fdef"</code>.</p>
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</div>
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<p><strong class="example">Example 2:</strong></p>
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<div class="example-block">
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<p><strong>Input:</strong> <span class="example-io">word = "bcdaaaab"</span></p>
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<p><strong>Output:</strong> <span class="example-io">1</span></p>
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<p><strong>Explanation:</strong></p>
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<p>The only substring is <code>"aaaa"</code>. Note that we cannot <strong>also</strong> choose <code>"bcdaaaab"</code> since it intersects with the other substring.</p>
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</div>
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<p> </p>
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<p><strong>Constraints:</strong></p>
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<ul>
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<li><code>1 <= word.length <= 2 * 10<sup>5</sup></code></li>
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<li><code>word</code> consists only of lowercase English letters.</li>
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</ul>
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