LeetCode 2801 (Hard, Acceptance Level 14.5%). Count Stepping Numbers in Range. DP. Efficiently handles large inputs (10^9 + 7).

1. 1Define the problem constraints and understand what constitutes a stepping number
2. 2Implement a dynamic programming approach to count stepping numbers within the given range
3. 3Optimize the solution to handle large inputs by applying modulo operations (10^9 + 7)
4. 4Test the solution with sample inputs to verify its correctness and efficiency
5. 5Apply the solution to various ranges to understand its scalability and performance

This solution benefits software engineers and algorithm designers who need to optimize their code for handling large numerical ranges, particularly those working on problems involving dynamic programming and number theory.

💡 Dynamic programming can be used to efficiently count stepping numbers within a large range by breaking down the problem into smaller sub-problems and applying modulo operations

💡 Efficiently count stepping numbers in a range using DP, handling large inputs up to 10^9 + 7