How to Solve Find Maximum Removals From Source String Problem
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Find Maximum Removals From Source String
You are given a string source of size n, a string pattern that is a subsequence of source, and a sorted integer array targetIndices that contains distinct numbers in the range [0, n - 1]. We define an...
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Understanding the Find Maximum Removals From Source String Problem
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Problem Statement
You are given a string source of size n, a string pattern that is a subsequence of source, and a sorted integer array targetIndices that contains distinct numbers in the range [0, n - 1]. We define an operation as removing a character at an index idx from source such that: idx is an element of targetIndices. pattern remains a subsequence of source after removing the character. Performing an operation does not change the indices of the other characters in source. For example, if you remove 'c' from "acb", the character at index 2 would still be 'b'. Return the maximum number of operations that can be performed.
Find Maximum Removals From Source String
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Examples
source = "abbaa", pattern = "aba", targetIndices = [0,1,2]1We can't remove source[0] but we can do either of these two operations: Remove source[1], so that source becomes "a_baa". Remove source[2], so that source becomes "ab_aa".
source = "bcda", pattern = "d", targetIndices = [0,3]2We can remove source[0] and source[3] in two operations.
source = "dda", pattern = "dda", targetIndices = [0,1,2]0We can't remove any character from source.
source = "yeyeykyded", pattern = "yeyyd", targetIndices = [0,2,3,4]2We can remove source[2] and source[3] in two operations.
Constraints
1 <= n == source.length <= 3 * 1031 <= pattern.length <= n1 <= targetIndices.length <= ntargetIndices is sorted in ascending order.The input is generated such that targetIndices contains distinct elements in the range [0, n - 1].source and pattern consist only of lowercase English letters.The input is generated such that pattern appears as a subsequence in source.How Interview Coder Helps with Leetcode Problems
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