Merge k Sorted Lists

📝 Description

Merge k sorted linked lists into one sorted linked list

Input Format

[[l1], [l2], ..., [lk]] (list of sorted arrays)

Output Format

[merged sorted array]

Constraints

0 ≤ k ≤ 10^4, total elements ≤ 10^4

🔍 Sample Input

[[1,4,5],[1,3,4],[2,6]]
            

✅ Sample Output

[1,1,2,3,4,4,5,6]