Subarray Sum Equals K

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LeetCode 560. Count subarrays whose sum equals K. Prefix-sum + hashmap is the canonical solution; appears as the second half of Meta phone screens paired with a heavier first problem.

SWE

MLE

Infra Eng

array

hashmap

prefix-sum

medium

Frequency

Low

Last asked

2026-04-24

Stage

phone-screen · onsite-coding