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42 lines
2.2 KiB
HTML
42 lines
2.2 KiB
HTML
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<p>You are given a <strong>0-indexed</strong> array of string <code>words</code> and two integers <code>left</code> and <code>right</code>.</p>
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<p>A string is called a <strong>vowel string</strong> if it starts with a vowel character and ends with a vowel character where vowel characters are <code>'a'</code>, <code>'e'</code>, <code>'i'</code>, <code>'o'</code>, and <code>'u'</code>.</p>
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<p>Return <em>the number of vowel strings </em><code>words[i]</code><em> where </em><code>i</code><em> belongs to the inclusive range </em><code>[left, right]</code>.</p>
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<p> </p>
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<p><strong class="example">Example 1:</strong></p>
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<pre>
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<strong>Input:</strong> words = ["are","amy","u"], left = 0, right = 2
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<strong>Output:</strong> 2
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<strong>Explanation:</strong>
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- "are" is a vowel string because it starts with 'a' and ends with 'e'.
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- "amy" is not a vowel string because it does not end with a vowel.
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- "u" is a vowel string because it starts with 'u' and ends with 'u'.
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The number of vowel strings in the mentioned range is 2.
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</pre>
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<p><strong class="example">Example 2:</strong></p>
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<pre>
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<strong>Input:</strong> words = ["hey","aeo","mu","ooo","artro"], left = 1, right = 4
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<strong>Output:</strong> 3
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<strong>Explanation:</strong>
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- "aeo" is a vowel string because it starts with 'a' and ends with 'o'.
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- "mu" is not a vowel string because it does not start with a vowel.
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- "ooo" is a vowel string because it starts with 'o' and ends with 'o'.
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- "artro" is a vowel string because it starts with 'a' and ends with 'o'.
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The number of vowel strings in the mentioned range is 3.
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</pre>
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<p> </p>
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<p><strong>Constraints:</strong></p>
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<ul>
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<li><code>1 <= words.length <= 1000</code></li>
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<li><code>1 <= words[i].length <= 10</code></li>
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<li><code>words[i]</code> consists of only lowercase English letters.</li>
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<li><code>0 <= left <= right < words.length</code></li>
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</ul>
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