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34 lines
992 B
HTML
34 lines
992 B
HTML
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<p>给你一个字符串 <code>s</code> ，请你统计并返回这个字符串中 <strong>回文子串</strong> 的数目。</p>
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<p><strong>回文字符串</strong> 是正着读和倒过来读一样的字符串。</p>
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<p><strong>子字符串</strong> 是字符串中的由连续字符组成的一个序列。</p>
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<p>具有不同开始位置或结束位置的子串，即使是由相同的字符组成，也会被视作不同的子串。</p>
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<p> </p>
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<p><strong>示例 1：</strong></p>
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<pre>
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<strong>输入：</strong>s = "abc"
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<strong>输出：</strong>3
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<strong>解释：</strong>三个回文子串: "a", "b", "c"
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</pre>
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<p><strong>示例 2：</strong></p>
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<pre>
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<strong>输入：</strong>s = "aaa"
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<strong>输出：</strong>6
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<strong>解释：</strong>6个回文子串: "a", "a", "a", "aa", "aa", "aaa"</pre>
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<p> </p>
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<p><strong>提示：</strong></p>
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<ul>
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<li><code>1 <= s.length <= 1000</code></li>
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<li><code>s</code> 由小写英文字母组成</li>
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</ul>
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