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Solution: Smallest Range Covering Elements from K Lists

Explore how to identify the smallest range that includes at least one element from each of k sorted lists by applying a min heap strategy. Understand the algorithm's step-by-step process to dynamically track current minimum and maximum values and refine the range efficiently. This lesson helps you master the underlying logic and time-space complexity trade-offs of this coding pattern.

Statement

You are given kk sorted lists of integers, nums, where each list in nums is in non-decreasing order. Your task is to find the smallest range that contains at least one element from each of the kk lists.

A range [a,b][a,b] is considered smaller than another range [c,d][c,d] if ...