Leetcode Problem 632. Smallest Range Covering Elements from K Lists

632. Smallest Range Covering Elements from K Lists

Leetcode Solutions

Approach # Using Priority Queue

  1. Initialize a priority queue to store the elements, along with their list and element indices.
  2. Add the first element of each list to the priority queue and note the initial maximum value.
  3. Initialize variables to track the smallest range found so far.
  4. While the priority queue is not empty: a. Pop the minimum element from the queue. b. If the current range (max - min) is smaller than the smallest range found so far, update the smallest range. c. Increment the pointer for the list from which the minimum element was taken. d. If the incremented pointer is still within the bounds of the list, add the next element to the queue and update the current maximum if necessary.
  5. Return the smallest range found.
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Approach # Using Pointers

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