Leetcode Problem 2058. Find the Minimum and Maximum Number of Nodes Between Critical Points

2058. Find the Minimum and Maximum Number of Nodes Between Critical Points

Leetcode Solutions

Iterative Approach to Find Critical Points in a Linked List

  1. Initialize variables to store the previous (prev), current (curr), and next (next) nodes, starting with head, head.next, and head.next.next respectively.
  2. Initialize a list critical_points to store the indices of critical points.
  3. Initialize variables index to 1, min_distance to infinity, and max_distance to -1.
  4. Iterate through the list while next is not None.
  5. At each step, check if curr is a critical point by comparing its value with prev and next.
  6. If it is a critical point, add index to critical_points.
  7. Update prev, curr, and next to move to the next set of nodes.
  8. Increment index.
  9. After the iteration, if there are fewer than two critical points, return [-1, -1].
  10. Otherwise, calculate the minimum distance by finding the smallest difference between consecutive indices in critical_points.
  11. Calculate the maximum distance by subtracting the first index from the last index in critical_points.
  12. Return [min_distance, max_distance].
UML Thumbnail

Two-Pass Approach to Find Critical Points in a Linked List

Ask Question

Programming Language
image/screenshot of info(optional)
Full Screen
Loading...

Suggested Answer

Answer
Full Screen
Copy Answer Code
Loading...