Leetcode Problem 2851. String Transformation

2851. String Transformation

Leetcode Solutions

String Rotation and Combinatorics

  1. Compute the hash of string t.
  2. Iterate over all possible rotations of s and compute their hashes.
  3. If the hash of a rotation matches the hash of t, store the rotation index.
  4. Use the stored rotation indices to calculate the number of ways to achieve each rotation in k steps using combinatorics.
  5. Sum up the number of ways for all valid rotations to get the final answer.
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Brute Force with String Rotation and Memoization

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