摘要：
Given keys and frequency at which these keys are searched, how would you create a binary search tree from these keys such that the cost of searching i 阅读全文
摘要：
Write a program to delete a tree. Solution. To delete all tree nodes, we need to set all non-leaf nodes' children nodes to null. So for a given non-le 阅读全文
摘要：
Write a function to detect if two trees are isomorphic. Two trees are called isomorphic if one of them can be obtained from other by a series of flips 阅读全文
摘要：
Given a binary tree, where every node value is a number . Find the sum of all the numbers which are formed from root to leaf paths. For example consid 阅读全文