Solution: Continuous Subarray Sum
Explore how to determine if an integer array contains a subarray whose sum is a multiple of a given integer k. Learn to use cumulative sums and hash maps to identify such subarrays efficiently by tracking remainders and checking subarray lengths. Understand the algorithm's approach and its time and space complexity to apply this pattern in 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
. 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
xis a multiple ofkif there exists an integernsuch thatx = n * k. Note that0is always considered a multiple ofk.
Constraints: ...