#90 · #2559 · Count Vowel Strings in Ranges(统计范围内的元音字符串数)

You are given an array of strings words and an array of queries, each queries[i] = [l, r]. A string is a vowel string if it starts and ends with a vowel. For each query, return the number of vowel strings in words[l..r] inclusive. Constraints: 1 <= words.length <= 10^5, 1 <= queries.length <= 10^5.