3335. Total Characters in String After Transformations I | Leetcode Daily - Python

Confused by LeetCode's 'Total Characters in String After Transformations I'? This video breaks it down! We start by understanding the string transformation rules and walk through an example. We explore why direct simulation is too slow and how a dynamic programming approach focusing on length seems promising but still fails for large transformation counts (t). The key insight is using matrix exponentiation! Learn how to construct the transformation matrix, calculate its power efficiently (M to the power of t), and combine the results to find the total string length modulo 10 to the power of 9 plus 7, all explained step-by-step with Python code (using NumPy).

Perfect for coding interview preparation and improving problem-solving skills.

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