Evaluate the value of an arithmetic expression inReverse Polish Notation.Valid operators are+,-,*,/. Each operand may be an integer or another express...
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其他好文 时间:
2014-06-28 22:31:11
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323
学习linux以来将centos改的也不少了,也不知道这个问题是由于那个修改来的。最近改bash的操作环境配置文件,用到了~/.bashrc这个文件,发现里面被我修改过。那是当年安装fcitx输入法的时候曾经设置过个人环境变量如下我当时是直接将这段粘贴到.bashrc这个文件中了,导致‘//这是新的...
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其他好文 时间:
2014-06-28 19:20:51
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1675
Given a stringsand a dictionary of wordsdict, add spaces insto construct a sentence where each word is a valid dictionary word.Return all such possibl...
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其他好文 时间:
2014-06-28 12:40:47
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219
Given a string containing only digits, restore it by returning all possible valid IP address combinations.For example:Given"25525511135",return["255.2...
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其他好文 时间:
2014-06-26 00:07:07
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311
Given a string containing only digits, restore it by returning all possible valid IP address combinations.For example:Given"25525511135",return["255.2...
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其他好文 时间:
2014-06-25 22:41:33
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274
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:
2014-06-25 12:44:56
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188
【问题】
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:
...
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编程语言 时间:
2014-06-24 23:22:53
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331
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" i...
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其他好文 时间:
2014-06-24 18:16:02
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147
【题目】
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 palindrome.
Note:
Have you consider that the string m...
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其他好文 时间:
2014-06-24 15:35:07
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150
Valid SudokuDetermine if a Sudoku is valid, according to: Sudoku Puzzles - The Rules.The Sudoku board could be partially filled, where empty cells are...
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其他好文 时间:
2014-06-21 16:40:45
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280