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43 lines
2.8 KiB
HTML
43 lines
2.8 KiB
HTML
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<p>Given a<strong> </strong>string <code>s</code>, find any <span data-keyword="substring">substring</span> of length <code>2</code> which is also present in the reverse of <code>s</code>.</p>
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<p>Return <code>true</code><em> if such a substring exists, and </em><code>false</code><em> otherwise.</em></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" style="border-color: var(--border-tertiary); border-left-width: 2px; color: var(--text-secondary); font-size: .875rem; margin-bottom: 1rem; margin-top: 1rem; overflow: visible; padding-left: 1rem;">
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<p><strong>Input: </strong><span class="example-io" style="font-family: Menlo,sans-serif; font-size: 0.85rem;">s = "leetcode"</span></p>
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<p><strong>Output: </strong><span class="example-io" style="font-family: Menlo,sans-serif; font-size: 0.85rem;">true</span></p>
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<p><strong>Explanation:</strong> Substring <code>"ee"</code> is of length <code>2</code> which is also present in <code>reverse(s) == "edocteel"</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" style="border-color: var(--border-tertiary); border-left-width: 2px; color: var(--text-secondary); font-size: .875rem; margin-bottom: 1rem; margin-top: 1rem; overflow: visible; padding-left: 1rem;">
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<p><strong>Input: </strong><span class="example-io" style="font-family: Menlo,sans-serif; font-size: 0.85rem;">s = "abcba"</span></p>
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<p><strong>Output: </strong><span class="example-io" style="font-family: Menlo,sans-serif; font-size: 0.85rem;">true</span></p>
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<p><strong>Explanation:</strong> All of the substrings of length <code>2</code> <code>"ab"</code>, <code>"bc"</code>, <code>"cb"</code>, <code>"ba"</code> are also present in <code>reverse(s) == "abcba"</code>.</p>
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</div>
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<p><strong class="example">Example 3:</strong></p>
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<div class="example-block" style="border-color: var(--border-tertiary); border-left-width: 2px; color: var(--text-secondary); font-size: .875rem; margin-bottom: 1rem; margin-top: 1rem; overflow: visible; padding-left: 1rem;">
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<p><strong>Input: </strong><span class="example-io" style="font-family: Menlo,sans-serif; font-size: 0.85rem;">s = "abcd"</span></p>
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<p><strong>Output: </strong><span class="example-io" style="font-family: Menlo,sans-serif; font-size: 0.85rem;">false</span></p>
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<p><strong>Explanation:</strong> There is no substring of length <code>2</code> in <code>s</code>, which is also present in the reverse of <code>s</code>.</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 <= s.length <= 100</code></li>
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<li><code>s</code> consists only of lowercase English letters.</li>
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</ul>
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