Grokking LinkedIn Coding Interview
Ask Author
Back to course home

0% completed

Vote For New Content
Edit Distance (medium)
Table of Contents

Contents are not accessible

Contents are not accessible

Contents are not accessible

Contents are not accessible

Contents are not accessible

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
    • Justification: Three operations needed: 1) Insert 'a' after 's', 2) Insert 't' after 'a', and 3) Replace 'n' with 'r'.

  • Example 3:

    • Input: word1 = "book", word2 = "back"
    • Expected Output: 2
    • Justification: Two operations are required: 1) Replace 'o' with 'a', and 2) Replace the second 'o' with 'c'. This changes "book" to "back".

Try it yourself

Try solving this question here:

Python3
Python3
. . . .

.....

.....

.....

Like the course? Get enrolled and start learning!

Table of Contents

Contents are not accessible

Contents are not accessible

Contents are not accessible

Contents are not accessible

Contents are not accessible