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Problem: Merge Two Sorted Lists

Explore merging two sorted linked lists into a single sorted list in C#. Learn to use dummy nodes and pointers to efficiently combine lists by comparing node values. Understand traversal techniques and handle edge cases while maintaining O(n+m) time complexity and constant space usage.

Statement

Given the heads of two sorted linked lists, list1 and list2, merge them into a single sorted linked list by splicing together the nodes from both input lists.

Return the head of the resulting merged linked list.

Note: Both list1 and list2 are sorted in non-decreasing order.

Constraints:

  • The number of nodes in each list is in the range [0,50][0, 50].

  • 100-100 \leq ...