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Grokking the Coding Interview Patterns

Count Subarrays With Score Less Than K

Explore how to efficiently count non-empty subarrays of an array where the score, defined as the sum of elements times the subarray length, is strictly less than a given threshold k. Understand the sliding window pattern to solve subarray problems with optimal complexity.

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Statement

An array score is defined as the sum of the array elements multiplied by its length. For example, if the array is [2,1,5][2, 1, 5], then its score is (2+1+5)×3(2 + 1 + 5) \times 3 ...