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easy· linked-list Mock interview

Merge Two Sorted Lists

Given the heads of two sorted-ascending singly linked lists, merge them into one sorted list and return its head.

Examples

in: l1 = [1,2,4], l2 = [1,3,4]

out: [1,1,2,3,4,4]

merged in order

in: l1 = [], l2 = [0]

out: [0]

one empty

Constraints

0 <= length of each list <= 50
-100 <= node value <= 100

Hints

target: O(n + m) time⌘↩ run · ⇧⌘↩ submit