Grokking LinkedIn Coding Interview
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Solution: Edit Distance
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Problem Statement

Given two strings word1 and word2, return the least number of edits needed to transform word1 to word2.

You can perform any one edit from below three in a single operation on Word:

  • Insert a character
  • Delete a character
  • Replace a character

Examples

  • Example 1:

    • Input: word1 = "cat", word2 = "cut"
    • Expected Output: 1
    • Justification: Only one operation is needed, replacing 'a' with 'u' in "cat" to make it "cut".

  • Example 2:

    • Input: word1 = "sun", word2 = "satur"
    • Expected Output: 3

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