Merge Two Sorted Lists

EasyLinked ListsLinked List

Solve this the way you would in the interview: out loud, on a timer, with an AI interviewer asking follow-ups while you code. You get a scored report at the end.

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Problem

You are given the heads of two sorted linked lists list1 and list2. Merge the two lists into one **sorted** list. The list should be made by splicing together the nodes of the first two lists. Return the head of the merged linked list.

Examples

Input: list1 = [1,2,4], list2 = [1,3,4]
Output: [1,1,2,3,4,4]
Input: list1 = [], list2 = []
Output: []
Input: list1 = [], list2 = [0]
Output: [0]

Constraints

  • The number of nodes in both lists is in the range [0, 50].
  • -100 <= Node.val <= 100
  • Both list1 and list2 are sorted in non-decreasing order.

What the interviewer grades

A correct solution is one of five scores. The report also grades problem understanding (did you clarify inputs and edge cases before coding), problem solving, communication while you work, code quality, and testing. See a sample report, or read up on the pattern in the lessons.

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