What is the space complexity of the dynamic programming solution for the edit di
Practice Questions
Q1
What is the space complexity of the dynamic programming solution for the edit distance problem?
O(n)
O(m)
O(n * m)
O(1)
Questions & Step-by-Step Solutions
What is the space complexity of the dynamic programming solution for the edit distance problem?
Step 1: Understand the edit distance problem. It measures how many operations (insertions, deletions, substitutions) are needed to transform one string into another.
Step 2: Know that dynamic programming is a method used to solve this problem by breaking it down into smaller subproblems.
Step 3: Realize that we use a 2D table (array) to store the results of these subproblems. The size of this table is determined by the lengths of the two strings.
Step 4: If the first string has length n and the second string has length m, the table will have n+1 rows and m+1 columns (to account for the empty string).
Step 5: Calculate the total number of cells in the table, which is (n+1) * (m+1). This simplifies to O(n * m) in terms of space complexity.
Step 6: Conclude that the space complexity of the dynamic programming solution for the edit distance problem is O(n * m).
