testing: improve MergeKSortedLinkedListTes
#6445
Open
+84
−0
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This PR adds additional test cases to improve coverage of edge cases and data variations in the merge k sorted linked lists implementation:
Null lists mixed with valid lists
Duplicate values across multiple lists
Zero-length input array
Negative numbers
Identical lists merging
Already sorted sequence
clang-format -i --style=file path/to/your/file.java