摘要： 题目如下： You are given a string s of even length. Split this string into two halves of equal lengths, and let a be the first half and b be the second hal 阅读全文

摘要： 题目如下： You may recall that an array arr is a mountain array if and only if: arr.length >= 3 There exists some index i (0-indexed) with 0 < i < arr.leng 阅读全文

摘要： 题目如下： You are given a 0-indexed integer array nums and an integer k. You are initially standing at index 0. In one move, you can jump at most k steps 阅读全文