墨云黑

摘要： Count Sorted Vowel Strings (M) 题目 Given an integer n, return the number of strings of length n that consist only of vowels (a, e, i, o, u) and are lex 阅读全文

摘要： Max Number of K-Sum Pairs (M) 题目 You are given an integer array nums and an integer k. In one operation, you can pick two numbers from the array whose 阅读全文