LeetCode-Style Coding Problem (Implement and Pass Provided Tests)

Coding (LeetCode-style) You are given a typical LeetCode-style algorithmic problem. Implement a runnable solution such that: Your code must compile/run. The interviewer will validate it against several test cases; your solution should pass them. The focus is on correctness, reasonable time/space complexity, and solid edge-case handling. Note: The original post did not include the exact problem statement (inputs/outputs/constraints/examples), so a fully reproducible prompt cannot be reconstructed; therefore no concrete test cases or data limits are provided.