CNoodle

摘要： A string is considered beautiful if it satisfies the following conditions: Each of the 5 English vowels ('a', 'e', 'i', 'o', 'u') must appear at least 阅读全文

摘要： The frequency of an element is the number of times it occurs in an array. You are given an integer array nums and an integer k. In one operation, you 阅读全文