🚀

End of Year Sale: Use Coupon Code END2025 to Get Extra 25% Off.

12DAYS
:
20HOURS
:
26MINUTES
:
34SECONDS

Leetcode Problem 2062. Count Vowel Substrings of a String

2062. Count Vowel Substrings of a String

Leetcode Solutions

Sliding Window Approach

  1. Initialize a hashmap or array to count the vowels.
  2. Initialize two pointers, start and end, to 0.
  3. Initialize a variable totalVowels to 0 to keep track of the distinct vowels in the current window.
  4. Initialize a variable result to 0 to keep the count of valid substrings.
  5. 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.
  6. Return result.
UML Thumbnail

Brute Force Approach

Ask Question

Programming Language
image/screenshot of info(optional)
Full Screen
Loading...

Suggested Answer

Answer
Full Screen
Copy Answer Code
Loading...