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<!DOCTYPE html>
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                        Divide-and-conquer algorithm with O(n log n) time complexity that recursively splits, sorts, and merges subarrays.
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                        <pre class="text-green-400 code-block"><code>function mergeSort(arr) {
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}

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}</code></pre>
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                        <span class="text-sm text-gray-500">Time Complexity: O(n log n)</span>
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