RichardW

摘要： Problem: Given an array of integers and an integer k, you need to find the number of unique k-diff pairs in the array. Here a k-diff pair is defined a 阅读全文

摘要： A set object is an unordered collection of distinct hashtable objects. Common uses include membership testing, removing duplicates from a sequence, an 阅读全文

摘要： Given an array of integers, return indices of the two numbers such that they add up to a specific target. You may assume that each input would have ex 阅读全文