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32 lines
725 B
HTML
32 lines
725 B
HTML
<p>Given an integer <code>n</code>, return <em>the number of prime numbers that are strictly less than</em> <code>n</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> n = 10
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<strong>Output:</strong> 4
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<strong>Explanation:</strong> There are 4 prime numbers less than 10, they are 2, 3, 5, 7.
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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> n = 0
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<strong>Output:</strong> 0
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</pre>
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<p><strong class="example">Example 3:</strong></p>
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<pre>
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<strong>Input:</strong> n = 1
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<strong>Output:</strong> 0
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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>0 <= n <= 5 * 10<sup>6</sup></code></li>
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</ul>
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