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| 1 | +# 966. Vowel Spellchecker [Rating: 1795.04] |
| 2 | + |
| 3 | +<p>Given a <code>wordlist</code>, we want to implement a spellchecker that converts a query word into a correct word.</p> |
| 4 | + |
| 5 | +<p>For a given <code>query</code> word, the spell checker handles two categories of spelling mistakes:</p> |
| 6 | + |
| 7 | +<ul> |
| 8 | + <li>Capitalization: If the query matches a word in the wordlist (<strong>case-insensitive</strong>), then the query word is returned with the same case as the case in the wordlist. |
| 9 | + <ul> |
| 10 | + <li>Example: <code>wordlist = ["yellow"]</code>, <code>query = "YellOw"</code>: <code>correct = "yellow"</code></li> |
| 11 | + <li>Example: <code>wordlist = ["Yellow"]</code>, <code>query = "yellow"</code>: <code>correct = "Yellow"</code></li> |
| 12 | + <li>Example: <code>wordlist = ["yellow"]</code>, <code>query = "yellow"</code>: <code>correct = "yellow"</code></li> |
| 13 | + </ul> |
| 14 | + </li> |
| 15 | + <li>Vowel Errors: If after replacing the vowels <code>('a', 'e', 'i', 'o', 'u')</code> of the query word with any vowel individually, it matches a word in the wordlist (<strong>case-insensitive</strong>), then the query word is returned with the same case as the match in the wordlist. |
| 16 | + <ul> |
| 17 | + <li>Example: <code>wordlist = ["YellOw"]</code>, <code>query = "yollow"</code>: <code>correct = "YellOw"</code></li> |
| 18 | + <li>Example: <code>wordlist = ["YellOw"]</code>, <code>query = "yeellow"</code>: <code>correct = ""</code> (no match)</li> |
| 19 | + <li>Example: <code>wordlist = ["YellOw"]</code>, <code>query = "yllw"</code>: <code>correct = ""</code> (no match)</li> |
| 20 | + </ul> |
| 21 | + </li> |
| 22 | +</ul> |
| 23 | + |
| 24 | +<p>In addition, the spell checker operates under the following precedence rules:</p> |
| 25 | + |
| 26 | +<ul> |
| 27 | + <li>When the query exactly matches a word in the wordlist (<strong>case-sensitive</strong>), you should return the same word back.</li> |
| 28 | + <li>When the query matches a word up to capitlization, you should return the first such match in the wordlist.</li> |
| 29 | + <li>When the query matches a word up to vowel errors, you should return the first such match in the wordlist.</li> |
| 30 | + <li>If the query has no matches in the wordlist, you should return the empty string.</li> |
| 31 | +</ul> |
| 32 | + |
| 33 | +<p>Given some <code>queries</code>, return a list of words <code>answer</code>, where <code>answer[i]</code> is the correct word for <code>query = queries[i]</code>.</p> |
| 34 | + |
| 35 | +<p> </p> |
| 36 | +<p><strong class="example">Example 1:</strong></p> |
| 37 | +<pre><strong>Input:</strong> wordlist = ["KiTe","kite","hare","Hare"], queries = ["kite","Kite","KiTe","Hare","HARE","Hear","hear","keti","keet","keto"] |
| 38 | +<strong>Output:</strong> ["kite","KiTe","KiTe","Hare","hare","","","KiTe","","KiTe"] |
| 39 | +</pre><p><strong class="example">Example 2:</strong></p> |
| 40 | +<pre><strong>Input:</strong> wordlist = ["yellow"], queries = ["YellOw"] |
| 41 | +<strong>Output:</strong> ["yellow"] |
| 42 | +</pre> |
| 43 | +<p> </p> |
| 44 | +<p><strong>Constraints:</strong></p> |
| 45 | + |
| 46 | +<ul> |
| 47 | + <li><code>1 <= wordlist.length, queries.length <= 5000</code></li> |
| 48 | + <li><code>1 <= wordlist[i].length, queries[i].length <= 7</code></li> |
| 49 | + <li><code>wordlist[i]</code> and <code>queries[i]</code> consist only of only English letters.</li> |
| 50 | +</ul> |
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