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leetcode-cn/problem (English)/单词替换(English) [replace-words].html
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<p>In English, we have a concept called <strong>root</strong>, which can be followed by some other word to form another longer word - let&#39;s call this word <strong>successor</strong>. For example, when the <strong>root</strong> <code>&quot;an&quot;</code> is followed by the <strong>successor</strong> word <code>&quot;other&quot;</code>, we can form a new word <code>&quot;another&quot;</code>.</p>
<p>In English, we have a concept called <strong>root</strong>, which can be followed by some other word to form another longer word - let&#39;s call this word <strong>derivative</strong>. For example, when the <strong>root</strong> <code>&quot;help&quot;</code> is followed by the word <code>&quot;ful&quot;</code>, we can form a derivative <code>&quot;helpful&quot;</code>.</p>
<p>Given a <code>dictionary</code> consisting of many <strong>roots</strong> and a <code>sentence</code> consisting of words separated by spaces, replace all the <strong>successors</strong> in the sentence with the <strong>root</strong> forming it. If a <strong>successor</strong> can be replaced by more than one <strong>root</strong>, replace it with the <strong>root</strong> that has <strong>the shortest length</strong>.</p>
<p>Given a <code>dictionary</code> consisting of many <strong>roots</strong> and a <code>sentence</code> consisting of words separated by spaces, replace all the derivatives in the sentence with the <strong>root</strong> forming it. If a derivative can be replaced by more than one <strong>root</strong>, replace it with the <strong>root</strong> that has <strong>the shortest length</strong>.</p>
<p>Return <em>the <code>sentence</code></em> after the replacement.</p>