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23 lines
1.4 KiB
HTML
23 lines
1.4 KiB
HTML
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<p>哦，不！你不小心把一个长篇文章中的空格、标点都删掉了，并且大写也弄成了小写。像句子<code>"I reset the computer. It still didn’t boot!"</code>已经变成了<code>"iresetthecomputeritstilldidntboot"</code>。在处理标点符号和大小写之前，你得先把它断成词语。当然了，你有一本厚厚的词典<code>dictionary</code>，不过，有些词没在词典里。假设文章用<code>sentence</code>表示，设计一个算法，把文章断开，要求未识别的字符最少，返回未识别的字符数。</p>
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<p><strong>注意：</strong>本题相对原题稍作改动，只需返回未识别的字符数</p>
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<p> </p>
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<p><strong>示例：</strong></p>
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<pre><strong>输入：</strong>
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dictionary = ["looked","just","like","her","brother"]
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sentence = "jesslookedjustliketimherbrother"
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<strong>输出：</strong> 7
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<strong>解释：</strong> 断句后为"<strong>jess</strong> looked just like <strong>tim</strong> her brother"，共7个未识别字符。
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</pre>
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<p><strong>提示：</strong></p>
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<ul>
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<li><code>0 <= len(sentence) <= 1000</code></li>
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<li><code>dictionary</code>中总字符数不超过 150000。</li>
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<li>你可以认为<code>dictionary</code>和<code>sentence</code>中只包含小写字母。</li>
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</ul>
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