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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 integer lists. This lesson helps you apply a min heap to track and dynamically update the smallest and largest values, enabling you to optimize range selection while considering time and space complexity. Understand key iterative strategies to manage multiple lists efficiently and solve problems requiring range minimization in coding interviews.

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 ...