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Leetcode Problem 859. Buddy Strings

859. Buddy Strings

Leetcode Solutions

Key approach of the solution

  1. Check if s and goal have the same length. If not, return false.
  2. If s is equal to goal, check if there is any character in s that appears more than once. If so, return true.
  3. If s is not equal to goal, iterate through the strings and find the indices where the characters differ.
  4. If there are more than two indices with differences, return false.
  5. If there is exactly one index with a difference, return false.
  6. If there are exactly two indices with differences, check if swapping the characters at these indices in s would make s equal to goal. If so, return true.
  7. If none of the above conditions are met, return false.
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