How to Solve Number of Wonderful Substrings Problem
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Number of Wonderful Substrings
A wonderful string is a string where at most one letter appears an odd number of times. For example, "ccjjc" and "abab" are wonderful, but "ab" is not. Given a string word that consists of the first t...
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Understanding the Number of Wonderful Substrings Problem
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Problem Statement
A wonderful string is a string where at most one letter appears an odd number of times. For example, "ccjjc" and "abab" are wonderful, but "ab" is not. Given a string word that consists of the first ten lowercase English letters ('a' through 'j'), return the number of wonderful non-empty substrings in word. If the same substring appears multiple times in word, then count each occurrence separately. A substring is a contiguous sequence of characters in a string.
Number of Wonderful Substrings
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Examples
word = "aba"4The four wonderful substrings are underlined below: - "aba" -> "a" - "aba" -> "b" - "aba" -> "a" - "aba" -> "aba"
word = "aabb"9The nine wonderful substrings are underlined below: - "aabb" -> "a" - "aabb" -> "aa" - "aabb" -> "aab" - "aabb" -> "aabb" - "aabb" -> "a" - "aabb" -> "abb" - "aabb" -> "b" - "aabb" -> "bb" - "aabb" -> "b"
word = "he"2The two wonderful substrings are underlined below: - "he" -> "h" - "he" -> "e"
Constraints
1 <= word.length <= 105word consists of lowercase English letters from 'a' to 'j'.How Interview Coder Helps with Leetcode Problems
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