摘要：
problems:Given an array of integers, find out whether there are two distinct indices i and j in the array such that the difference between nums[i] and... 阅读全文
摘要：
Problems:Given an array of integers and an integer k, find out whether there there are two distinct indices i and j in the array such that nums[i] = n... 阅读全文
摘要：
Problem: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... 阅读全文