摘要：
Given an array containing n distinct numbers taken from 0, 1, 2, ..., n, find the one that is missing from the array. 翻译：给出一个包含n个不同数字的数组，数组中元素是从0,1,2, 阅读全文
摘要：
Given an array of integers, find if the array contains any duplicates. Your function should return true if any value appears at least twice in the arr 阅读全文
摘要：
Rotate an array of n elements to the right by k steps. For example, with n = 7 and k = 3, the array [1,2,3,4,5,6,7] is rotated to [5,6,7,1,2,3,4]. Not 阅读全文