摘要：
题目描述：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 th... 阅读全文
摘要：
题目描述：Given a non-negative number represented as an array of digits, plus one to the number.The digits are stored such that the most significant digit ... 阅读全文
摘要：
题目描述：Write an algorithm to determine if a number is "happy".A happy number is a number defined by the following process: Starting with any positive in... 阅读全文