Given a binary tree and a sum, determine if the tree has a root-to-leaf path such that adding up all the values along the path equals the given sum.Fo...
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其他好文 时间：
2014-11-08 13:35:55
阅读次数：
144
Follow up for "Search in Rotated Sorted Array":
What if duplicates are allowed?
Would this affect the run-time complexity? How and why?
Write a function to determine if a given target is in the...
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其他好文 时间：
2014-11-07 19:10:51
阅读次数：
161
Given a binary tree, determine if it is height-balanced.For this problem, a height-balanced binary tree is defined as a binary tree in which the depth...
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其他好文 时间：
2014-11-06 19:27:14
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227
Description
There are no days and nights on byte island, so the residents here can hardly determine the length of a single day. Fortunately, they have invented a clock with several pointers. They h...
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其他好文 时间：
2014-11-06 00:50:44
阅读次数：
176
这几天A的都是二叉树的，如果输的基本操作掌握了，用递归很好解决这些题目的。这个可能不是最好的解法，明天再去Discuss看看有没有好的解法Balanced Binary TreeGiven a binary tree, determine if it is height-balanced.For t...
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其他好文 时间：
2014-11-05 22:57:24
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261
leetcode 原题 ：（即判断二叉树是否为二叉查找树）Given a binary tree, determine if it is a valid binary search tree (BST).Assume a BST is defined as follows:The left subt...
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编程语言 时间：
2014-11-05 22:54:17
阅读次数：
204
题目描述：
Determine whether an integer is a palindrome. Do this without extra space.
代码：
bool Solution::isPalindrome(int x)
{
int a = x;
int b = 0;
while(a > 0)
{
b = b * ...
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其他好文 时间：
2014-11-05 21:35:26
阅读次数：
167
题目描述：
Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases.
For example,
"A man, a plan, a canal: Panama" is a palindrome.
"race a car...
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其他好文 时间：
2014-11-05 21:30:46
阅读次数：
160
Valid PalindromeGiven a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases.For example,"A man, a pla...
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其他好文 时间：
2014-11-05 21:22:45
阅读次数：
130
Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid.
The brackets must close in the correct order, "()" and "()[]{}" are all valid bu...
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其他好文 时间：
2014-11-05 09:21:15
阅读次数：
171
