Solution: Subarray Sum Equals K
Explore how to solve the problem of counting subarrays whose sum equals k by utilizing hash maps and prefix sums. This lesson guides you through implementing an efficient O(n) solution in C++, highlighting the use of prefix sum differences and hash map lookups to identify valid subarrays. You’ll learn to track prefix sums and their frequencies to count all such subarrays in one pass.
We'll cover the following...
We'll cover the following...
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:
...