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：
Given an array, rotate the array to the right by k steps, where k is non-negative. 题目：给定一个数组和一个数值k，要求将数组向右旋转k步。 以前准备面试时看到过这个题目，结果今天还是记不得空间复杂度O(1)的解法，好 阅读全文
摘要：
Given an array of size n, find the majority element. The majority element is the element that appears more than ⌊ n/2 ⌋ times. You may assume that the 阅读全文
摘要：
Given an array of integers that is already sorted in ascending order, find two numbers such that they add up to a specific target number. The function 阅读全文