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Solution: Smallest Range Covering Elements from K Lists

Explore how to determine the smallest range that includes at least one element from each of the k sorted lists by using a min heap to track minimum and maximum values. Understand the step-by-step process of pushing and popping elements to maintain this range, and analyze the time and space complexity to optimize your solution.

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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 ...