Package g2501_2600.s2559_count_vowel_strings_in_ranges

Class Solution

  • public class Solution
extends Object
    2559 - Count Vowel Strings in Ranges.

    Medium

    You are given a 0-indexed array of strings words and a 2D array of integers queries.

    Each query queries[i] = [li, ri] asks us to find the number of strings present in the range li to ri (both inclusive ) of words that start and end with a vowel.

    Return an array ans of size queries.length, where ans[i] is the answer to the ith query.

    Note that the vowel letters are 'a', 'e', 'i', 'o', and 'u'.

    Example 1:

    Input: words = [“aba”,“bcb”,“ece”,“aa”,“e”], queries = [[0,2],[1,4],[1,1]]

    Output: [2,3,0]

    Explanation: The strings starting and ending with a vowel are “aba”, “ece”, “aa” and “e”.

    The answer to the query [0,2] is 2 (strings “aba” and “ece”).

    to query [1,4] is 3 (strings “ece”, “aa”, “e”).

    to query [1,1] is 0.

    We return [2,3,0].

    Example 2:

    Input: words = [“a”,“e”,“i”], queries = [[0,2],[0,1],[2,2]]

    Output: [3,2,1]

    Explanation: Every string satisfies the conditions, so we return [3,2,1].

    Constraints:

    • 1 <= words.length <= 105
    • 1 <= words[i].length <= 40
    • words[i] consists only of lowercase English letters.
    • sum(words[i].length) <= 3 * 105
    • 1 <= queries.length <= 105
    • 0 <= li <= ri < words.length

    • Constructor Detail

      • Solution

        public Solution()

    • Method Detail

      • vowelStrings

        public int[] vowelStrings​(String[] words,
                          int[][] queries)