Just DO IT by luckygxf

摘要： Given a binary tree, determine if it is a valid binary search tree (BST).Assume a BST is defined as follows:The left subtree of a node contains only n... 阅读全文

摘要： Given a binary tree, return thezigzag level ordertraversal of its nodes' values. (ie, from left to right, then right to left for the next level and al... 阅读全文

摘要： Given an integern, return the number of trailing zeroes inn!.Note:Your solution should be in logarithmic time complexity.只有2 * 5才会产生0只要计算出因子中2和5的个数取小的... 阅读全文

摘要： Given preorder and inorder traversal of a tree, construct the binary tree.这道题是要根据先序遍历和中序遍历构造出一棵二叉树，这道题和上一题是一样的。上一题不过是通过后序遍历和中序遍历构造一棵二叉树。只要将代码稍稍修改即可 1 ... 阅读全文

摘要： Given inorder and postorder traversal of a tree, construct the binary tree.根据树的中序（左根右）和后序遍历（左右根）构造一棵二叉树参考：http://www.cnblogs.com/remlostime/archive/20... 阅读全文

摘要： For example: A -> 1 B -> 2 C -> 3 ... Z -> 26 AA -> 27 AB -> 28 看成26进制和10进制之间的转换，Excel Sheet Column Title这道题的逆过程 1 public class S... 阅读全文

摘要： Convert Sorted List to Binary Search TreeGiven a singly linked list where elements are sorted in ascending order, convert it to a height balanced BST.... 阅读全文

摘要： Convert Sorted Array to Binary Search TreeGiven an array where elements are sorted in ascending order, convert it to a height balanced BST.题意：给一个升序排好的... 阅读全文

摘要： Longest Substring Without Repeating CharactersGiven a string, find the length of the longest substring without repeating characters. For example, the ... 阅读全文

摘要： Palindrome PartitioningGiven a strings, partitionssuch that every substring of the partition is a palindrome.Return all possible palindrome partitioni... 阅读全文