{ "data": { "question": { "questionId": "1464", "questionFrontendId": "1338", "boundTopicId": null, "title": "Reduce Array Size to The Half", "titleSlug": "reduce-array-size-to-the-half", "content": "

You are given an integer array arr. You can choose a set of integers and remove all the occurrences of these integers in the array.

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Return the minimum size of the set so that at least half of the integers of the array are removed.

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Example 1:

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\nInput: arr = [3,3,3,3,5,5,5,2,2,7]\nOutput: 2\nExplanation: 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).\nPossible sets of size 2 are {3,5},{3,2},{5,2}.\nChoosing 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.\n
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Example 2:

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\nInput: arr = [7,7,7,7,7,7]\nOutput: 1\nExplanation: The only possible set you can choose is {7}. This will make the new array empty.\n
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Constraints:

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Most standard library headers are already included automatically for your convenience.

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