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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 using a min heap approach. Understand the process of dynamically tracking range bounds, updating the range efficiently, and handling multiple sorted lists. This lesson helps you implement a solution that maintains one element per list in a priority queue to determine the minimal covering range, while analyzing the time and space complexity tradeoffs.

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 ...