Continuous Subarray Sum

Explore how to identify a continuous subarray in an integer array whose sum is a multiple of a given number k. This lesson helps you understand and implement an efficient hash map based solution, reinforcing your skills in array manipulation and modular arithmetic for coding interviews.

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Statement

Given an integer array nums and an integer k, determine if nums contains a good subarray. Return true if such a subarray exists; otherwise, return false.

A subarray of nums is considered good if:

Its length is at least $2$ .
The sum of its elements is a multiple of k.

Notes:
A subarray is defined as a contiguous sequence of elements within an array.
An integer x is a multiple of k if there exists an integer n such that x = n * k. Note that 0 is always considered a multiple of k.

Constraints:

$1 \leq$ ...