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Given an integer array, filter the array by upper and lower bounds. Return the number of combinations in the array size >= K. Example: Input: N = 6 arr = [5, 8, 9, 10, 1, 3] lowerBound = 2 upperBound = 9 K = 3 Output: 5 Explanation: Filter the array: [5, 8, 9, 3]. There are five combinations with minimum 3 numbers: [5, 8, 9], [5, 8, 3], [5, 9, 3], [8, 9, 3], [5, 8, 9, 3]. Return 5.



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