Minimum Insertions/Deletions to Convert String
DP on Strings DSA practice problem on Onlearn.
Difficulty: hard.
Topics: Minimum Insertions/Deletions to Convert String A to String B, Dynamic Programming, Longest Common Subsequence, String Manipulation, Time Complexity, Space Complexity, Tabulation, Space Optimization, time complexity analysis, dynamic programming, dynamic programming optimization, string manipulation.
Minimum Insertions/Deletions to Convert String A to String B Problem Statement You are given two strings, str1 and str2. You are allowed to perform the following operations on str1: 1. Delete any number of characters from str1. 2. Insert any number of characters into str1. Your task is to find the minimum number of operations required to transform str1 into str2. Input Specification The input consists of two strings: str1: The source string. str2: The target string. Output Specification Return an integer representing the minimum total number of insertions and deletions required. Sample Test Cases Example 1: Input: str1 = "abcd" str2 = "anc" Output: 3 Explanation: To convert "abcd" to "anc": 1. Delete 'b' from "abcd" "acd" (1 deletion) 2. Delete 'd' from "acd" "ac" (1 deletion) 3. Insert 'n' into "ac" at index 1 "anc" (1 insertion) Total operations: 1 + 1 + 1 = 3.