How to Solve Extra Characters in a String Problem
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Extra Characters in a String
You are given a 0-indexed string s and a dictionary of words dictionary. You have to break s into one or more non-overlapping substrings such that each substring is present in dictionary. There may be...
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Understanding the Extra Characters in a String Problem
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Problem Statement
You are given a 0-indexed string s and a dictionary of words dictionary. You have to break s into one or more non-overlapping substrings such that each substring is present in dictionary. There may be some extra characters in s which are not present in any of the substrings. Return the minimum number of extra characters left over if you break up s optimally.
Extra Characters in a String
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Examples
s = "leetscode", dictionary = ["leet","code","leetcode"]1We can break s in two substrings: "leet" from index 0 to 3 and "code" from index 5 to 8. There is only 1 unused character (at index 4), so we return 1.
s = "sayhelloworld", dictionary = ["hello","world"]3We can break s in two substrings: "hello" from index 3 to 7 and "world" from index 8 to 12. The characters at indices 0, 1, 2 are not used in any substring and thus are considered as extra characters. Hence, we return 3.
Constraints
1 <= s.length <= 501 <= dictionary.length <= 501 <= dictionary[i].length <= 50dictionary[i] and s consists of only lowercase English lettersdictionary contains distinct wordsHow Interview Coder Helps with Leetcode Problems
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