The problem:Given a stringsconsists of upper/lower-case alphabets and empty space characters' ', return the length of last word in the string.If the l...
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其他好文 时间：
2015-01-16 01:07:30
阅读次数：
250
题目：
Evaluate the value of an arithmetic expression in Reverse Polish Notation.
Valid operators are +, -, *, /.
Each operand may be an integer or another expression.
Some examples:
["2"...
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编程语言 时间：
2015-01-15 20:25:10
阅读次数：
148
Validate if a given string is numeric.Some examples:"0"=>true" 0.1 "=>true"abc"=>false"1 a"=>false"2e10"=>trueNote:It is intended for the problem stat...
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其他好文 时间：
2015-01-15 18:07:03
阅读次数：
122
Evaluate the value of an arithmetic expression in Reverse Polish Notation.
Valid operators are +, -, *, /.
Each operand may be an integer or another expression.
Some examples:
["2", "1", ...
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其他好文 时间：
2015-01-15 13:00:38
阅读次数：
156
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" is not a ...
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其他好文 时间：
2015-01-15 09:26:10
阅读次数：
160
问题描述：
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'...
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其他好文 时间：
2015-01-14 22:53:40
阅读次数：
179
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：
2015-01-14 22:44:53
阅读次数：
189
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...
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其他好文 时间：
2015-01-14 14:23:11
阅读次数：
148
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：
2015-01-14 09:52:48
阅读次数：
161
Android Studio正式版已经发布一段时间了，使用Mac版的Android Studio可能与遇到Java not found：Android Studio was unable to find a valid JVM问题。
解决这个问题：
首先要确定mac系统上有没有安装jdk，并查看自己的jdk版本，可以在终端上输入命令 java -version查...
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移动开发 时间：
2015-01-14 00:58:06
阅读次数：
214
