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Grokking the Coding Interview Patterns

Subarray Sum Equals K

Explore how to determine the total number of contiguous subarrays that sum to a given value k. Understand the use of hash maps to solve this common coding interview problem efficiently by tracking cumulative sums and optimizing your approach.

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Statement

Given an array of integers nums and an integer k, determine the total number of subarrays whose sum is exactly equal to k.

Note: A subarray is a contiguous, non empty sequence of elements within an array.

Constraints:

  • 1≤1 \leq nums.length ≤2 ...