Merge K Sorted Arrays

**Problem Statement:** Given the required input arguments, write an efficient algorithm to solve the **Merge K Sorted Arrays** problem. Implement the required logic as specified by standard definitions for this classic algorithmic challenge. **Hint / Expected Approach:** Min-heap with (val, arrayIdx, elemIdx) **Edge Cases to Consider:** - (1) All arrays empty - (2) Single array - (3) Arrays of very different lengths

Examples

Example 1

Input: [[1,4,7],[2,5,8],[3,6,9]]

Output: [1,2,3,4,5,6,7,8,9]

Explanation: Three arrays

Example 2

Input: [[1,2,3]]

Output: [1,2,3]

Explanation: Single array

Example 3

Input: [[],[]]

Output: []

Explanation: Both empty

Constraints

▪Input arguments are within valid ranges
▪Optimize for execution speed
▪Handle null/empty inputs gracefully

Watch Out For Edge Cases

▪All arrays empty
▪Single array
▪Arrays of very different lengths

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