Leetcode Problem 2301. Match Substring After Replacement

2301. Match Substring After Replacement

Leetcode Solutions

Brute Force with Character Mapping Validation

  1. Create a hash map (mappings_map) to store the mappings for quick lookups.
  2. Iterate over each character mapping and add it to mappings_map.
  3. Iterate over each possible starting position in s.
  4. For each starting position, attempt to match sub to the substring of s starting at that position.
  5. For each character in sub, check if it matches the corresponding character in s or if there is a valid mapping.
  6. If a character does not match and there is no valid mapping, break out of the loop and move to the next starting position.
  7. If the entire sub string is successfully matched, return true.
  8. If no match is found after checking all starting positions, return false.
UML Thumbnail

Using Regular Expressions

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