Leetcode Problem 583. Delete Operation for Two Strings

583. Delete Operation for Two Strings

Leetcode Solutions

Using Longest Common Subsequence - Dynamic Programming

  1. Initialize a 2D array dp with dimensions (len(word1) + 1) x (len(word2) + 1) and fill it with zeros.
  2. Loop through each character of word1 and word2 using two nested loops.
  3. If the characters at the current indices match, set dp[i][j] to dp[i-1][j-1] + 1.
  4. If the characters do not match, set dp[i][j] to the maximum of dp[i-1][j] and dp[i][j-1].
  5. After filling the dp array, the length of the LCS will be at dp[len(word1)][len(word2)].
  6. Calculate the minimum number of steps as len(word1) + len(word2) - 2 * dp[len(word1)][len(word2)].
  7. Return the calculated minimum number of steps.
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Using Longest Common Subsequence with Memoization

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