{ "data": { "question": { "questionId": "2394", "questionFrontendId": "2302", "boundTopicId": null, "title": "Count Subarrays With Score Less Than K", "titleSlug": "count-subarrays-with-score-less-than-k", "content": "

The score of an array is defined as the product of its sum and its length.

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Given a positive integer array nums and an integer k, return the number of non-empty subarrays of nums whose score is strictly less than k.

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A subarray is a contiguous sequence of elements within an array.

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Example 1:

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\nInput: nums = [2,1,4,3,5], k = 10\nOutput: 6\nExplanation:\nThe 6 subarrays having scores less than 10 are:\n- [2] with score 2 * 1 = 2.\n- [1] with score 1 * 1 = 1.\n- [4] with score 4 * 1 = 4.\n- [3] with score 3 * 1 = 3. \n- [5] with score 5 * 1 = 5.\n- [2,1] with score (2 + 1) * 2 = 6.\nNote that subarrays such as [1,4] and [4,3,5] are not considered because their scores are 10 and 36 respectively, while we need scores strictly less than 10.
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Example 2:

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\nInput: nums = [1,1,1], k = 5\nOutput: 5\nExplanation:\nEvery subarray except [1,1,1] has a score less than 5.\n[1,1,1] has a score (1 + 1 + 1) * 3 = 9, which is greater than 5.\nThus, there are 5 subarrays having scores less than 5.\n
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Constraints:

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