Leetcode Problem 2062. Count Vowel Substrings of a String

2062. Count Vowel Substrings of a String

Leetcode Solutions

Initialize a hashmap or array to count the vowels.
Initialize two pointers, start and end, to 0.
Initialize a variable totalVowels to 0 to keep track of the distinct vowels in the current window.
Initialize a variable result to 0 to keep the count of valid substrings.
Iterate over the string with the end pointer. a. If the current character is a vowel, increment its count and increment totalVowels if this is the first occurrence of the vowel in the window. b. While totalVowels is 5 (all vowels are present), try to shrink the window from the start to find the smallest window containing all vowels and update result. c. If a non-vowel character is encountered, reset the counts and totalVowels, and move start to end + 1.
Return result.

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