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LeetCode OJ - Validate Binary Search Tree
题目: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 onl...
分类:其他好文   时间:2014-05-23 12:20:50    阅读次数:407
LeetCode: Maximum Depth of Binary Tree 题解
Given a binary tree, find its maximum depth.The maximum depth is the number of nodes along the longest path from the root node down to the farthest le...
分类:其他好文   时间:2014-05-23 11:54:10    阅读次数:317
LeetCode OJ - Recover Binary Search Tree
题目:Two elements of a binary search tree (BST) are swapped by mistake.Recover the tree without changing its structure.Note:A solution using O(n) space ...
分类:其他好文   时间:2014-05-23 11:31:51    阅读次数:299
Leetcode ---- Swap Nodes in Pairs
题目链接题意:给出单链表头指针,要求交换链表中每一对相邻的结点.注意:不可以改变链表中结点的值,只可以使用常量空间.附上代码: 1 /** 2 * Definition for singly-linked list. 3 * struct ListNode { 4 * int val;...
分类:其他好文   时间:2014-05-23 10:43:49    阅读次数:249
【LeetCode】Remove Duplicates from Sorted Array II
Remove Duplicates from Sorted Array IIFollow up for "Remove Duplicates":What if duplicates are allowed at mosttwice?For example,Given sorted array A =...
分类:其他好文   时间:2014-05-23 10:23:40    阅读次数:250
Leetcode:Convert Sorted Array to Binary Search Tree
戳我去解题Given an array where elements are sorted in ascending order, convert it to a height balanced BST.分析:因为BST中序序列是升序的,所以中序遍历序列最中间的元素一定是根节点,然后左右递归构建二叉...
分类:其他好文   时间:2014-05-20 11:38:16    阅读次数:233
Leetcode:Add Binary
戳我去解题Given two binary strings, return their sum (also a binary string).For example,a ="11"b ="1"Return"100".分析:高精度加法,只是将10进制的高精度加法 换成了 2进制的高精度加法首先将 两个...
分类:其他好文   时间:2014-05-20 11:21:52    阅读次数:224
Leetcode:Plus One
戳我去解题Given a non-negative number represented as an array of digits, plus one to the number.The digits are stored such that the most significant digit ...
分类:其他好文   时间:2014-05-20 10:42:14    阅读次数:244
Leetcode:Same Tree
戳我去解题Given two binary trees, write a function to check if they are equal or not.Two binary trees are considered equal if they are structurally identic...
分类:其他好文   时间:2014-05-20 10:09:37    阅读次数:201
Leetcode:Merge Two Sorted Lists
戳我去解题Merge two sorted linked lists and return it as a new list. The new list should be made by splicing together the nodes of the first two lists.分析:直...
分类:其他好文   时间:2014-05-20 08:52:09    阅读次数:277
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