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🧮 Beginner’s Guide to "Maximum Difference by Remapping a Digit" – LeetCode 2566 (C++ | JavaScript | Python)
- LeetCode problem 2566: Maximum Difference by Remapping a Digit involves remapping one digit in a number to find the maximum difference between the largest and smallest number possible.
- The problem allows Bob to change one digit (0–9) to any other digit, including itself, and aims to maximize the difference between the resulting numbers.
- The key approach is to change the leftmost significant digits to impact the number the most, ensuring a larger shift for maximum difference.
- In C++, the solution involves finding the first non-'9' digit and the first digit, then replacing them to compute the maximum and minimum values for the difference.
- The JavaScript and Python versions also follow similar logic to find and replace digits to calculate the difference.
- Test cases demonstrate how the algorithm works for different inputs, producing the correct maximum differences.
- The time complexity for this problem is O(n), where n is the number of digits, as it involves a single pass for replacement.
- Space complexity is O(1) as only a few variables are used during the computation.
- This problem is a great exercise for understanding greedy digit manipulation and string traversal techniques, emphasizing maximizing by changing the first non-'9' digit to '9' and minimizing by changing the first digit to '0'.
- Developers can drop a ❤️ if they found this breakdown helpful and can look forward to more concise explanations in the future.
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