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48 lines
1.3 KiB
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48 lines
1.3 KiB
HTML
<p>给定一个字符串数组 <code>arr</code>，字符串 <code>s</code> 是将 <code>arr</code> 的含有 <strong>不同字母</strong> 的 <strong>子序列</strong> 字符串 <strong>连接</strong> 所得的字符串。</p>
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<p>请返回所有可行解 <code>s</code> 中最长长度。</p>
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<p><strong>子序列</strong> 是一种可以从另一个数组派生而来的数组，通过删除某些元素或不删除元素而不改变其余元素的顺序。</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>arr = ["un","iq","ue"]
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<strong>输出：</strong>4
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<strong>解释：</strong>所有可能的串联组合是：
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- ""
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- "un"
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- "iq"
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- "ue"
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- "uniq" ("un" + "iq")
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- "ique" ("iq" + "ue")
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最大长度为 4。
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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>arr = ["cha","r","act","ers"]
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<strong>输出：</strong>6
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<strong>解释：</strong>可能的解答有 "chaers" 和 "acters"。
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</pre>
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<p><strong>示例 3：</strong></p>
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<pre>
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<strong>输入：</strong>arr = ["abcdefghijklmnopqrstuvwxyz"]
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<strong>输出：</strong>26
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</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 <= arr.length <= 16</code></li>
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<li><code>1 <= arr[i].length <= 26</code></li>
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<li><code>arr[i]</code> 中只含有小写英文字母</li>
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</ul>
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