摘要：
Graph is an important data structure and has many important applications. Moreover, grach traversal is key to many graph algorithms.There are two syst... 阅读全文
摘要：
Problem Description:Given two strings S and T, determine if they are both one edit distance apart.To solve this problem, you first need to know what i... 阅读全文
摘要：
This problem is similar to Missing Ranges and easier than that one.The idea is to use two pointers to find the beginning and end of a range and then p... 阅读全文