摘要：
Sort a linked list using insertion sort. Example Given 1->3->2->0->null, return 0->1->2->3->null. 思路也比较直接，insertion sort，要注意的就是操作linkedlist的一些问题 /** * 阅读全文
摘要：
Given a binary search tree and a new tree node, insert the node into the tree. You should keep the tree still be a valid binary search tree. Example G 阅读全文
摘要：
Given a non-overlapping interval list which is sorted by start point. Insert a new interval into it, make sure the list is still in order and non-over 阅读全文
摘要：
Check if two binary trees are identical. Identical means the two binary trees have the same structure and every identical position has the same value. 阅读全文
摘要：
In data structure Hash, hash function is used to convert a string(or any other type) into an integer smaller than hash size and bigger or equal to zer 阅读全文
摘要：
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 integer, 阅读全文