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32 lines
1.2 KiB
HTML
32 lines
1.2 KiB
HTML
<p>You are given an integer array <code>arr</code>. You can choose a set of integers and remove all the occurrences of these integers in the array.</p>
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<p>Return <em>the minimum size of the set so that <strong>at least</strong> half of the integers of the array are removed</em>.</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> arr = [3,3,3,3,5,5,5,2,2,7]
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<strong>Output:</strong> 2
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<strong>Explanation:</strong> Choosing {3,7} will make the new array [5,5,5,2,2] which has size 5 (i.e equal to half of the size of the old array).
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Possible sets of size 2 are {3,5},{3,2},{5,2}.
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Choosing set {2,7} is not possible as it will make the new array [3,3,3,3,5,5,5] which has a size greater than half of the size of the old array.
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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> arr = [7,7,7,7,7,7]
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<strong>Output:</strong> 1
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<strong>Explanation:</strong> The only possible set you can choose is {7}. This will make the new array empty.
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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>2 <= arr.length <= 10<sup>5</sup></code></li>
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<li><code>arr.length</code> is even.</li>
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<li><code>1 <= arr[i] <= 10<sup>5</sup></code></li>
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</ul>
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