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Solution: Smallest Range Covering Elements from K Lists

Explore how to efficiently identify the smallest range that includes at least one element from each of k sorted lists using a min heap. Learn to maintain and update the range dynamically through the iteration, understand the algorithm’s approach, and analyze its time and space complexity for scalable performance.

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 ...