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 nodes with keys less than the node's key.Th...
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其他好文 时间：
2015-04-25 15:11:01
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135
问题描述：Determine whether an integer is a palindrome. Do this without extra space.Some hints:Could negative integers be palindromes? (ie, -1)If you are t...
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编程语言 时间：
2015-04-25 14:54:15
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167
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, replace the number by the sum of the square...
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移动开发 时间：
2015-04-25 00:21:22
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153
题目描述Given an array of non-negative integers, you are initially positioned at the first index of the array.Each element in the array represents your maximum jump length at that position.Determine if you...
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其他好文 时间：
2015-04-24 21:14:14
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171
Path SumTotal Accepted:50593Total Submissions:169742My SubmissionsQuestionSolutionGiven a binary tree and a sum, determine if the tree has a root-to-l...
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其他好文 时间：
2015-04-24 12:09:15
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95
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, replace the number by the sum of the squares o...
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移动开发 时间：
2015-04-24 09:03:57
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117
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, replace the number by the sum of the squares...
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移动开发 时间：
2015-04-23 21:46:26
阅读次数：
222
Given a string containing just the characters'(',')','{','}','['and']', determine if the input string is valid.The brackets must close in the correct ...
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其他好文 时间：
2015-04-23 21:31:47
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127
problem：
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 of the two subtrees of ev...
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其他好文 时间：
2015-04-23 15:47:04
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166
202 Happy numberQuestionWrite an algorithm to determine if a number is “happy”.A happy number is a number defined by the following process: Starting w...
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移动开发 时间：
2015-04-23 14:58:47
阅读次数：
125
