What is the time complexity of Count of Substrings Containing Every Vowel and K Consonants II?

The optimal solution for Count of Substrings Containing Every Vowel and K Consonants II runs in undefined time and uses undefined space. undefined

What algorithm or data structure is used to solve Count of Substrings Containing Every Vowel and K Consonants II?

Count of Substrings Containing Every Vowel and K Consonants II uses the following concepts: Hash Table, String, Sliding Window. The recommended patterns to study are: .

#3306

Count of Substrings Containing Every Vowel and K Consonants II

Medium

Hash TableStringSliding Window

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Approaches

💡

Intuition

Time Space

The brute force approach involves generating all possible substrings of the given string and checking each one to see if it contains all vowels and exactly k consonants. This method is straightforward but inefficient for larger strings.

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Algorithm

3 steps

1Step 1: Generate all possible substrings of the input string.
2Step 2: For each substring, count the number of vowels and consonants.
3Step 3: Check if the substring contains all vowels and exactly k consonants. If it does, increment the count.

solution.py17 lines

1# Full working Python code
2
3def countSubstrings(word, k):
4    vowels = set('aeiou')
5    count = 0
6    n = len(word)
7    for i in range(n):
8        for j in range(i + 1, n + 1):
9            substring = word[i:j]
10            vowel_count = sum(1 for char in substring if char in vowels)
11            consonant_count = sum(1 for char in substring if char.isalpha() and char not in vowels)
12            if vowel_count == 5 and consonant_count == k:
13                count += 1
14    return count
15
16# Example usage
17print(countSubstrings('aeioqq', 1))  # Output: 0

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