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:
2014-08-20 13:57:52
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176
操作
Change operations:
0 a b change all characters into '0's in [a , b]
1 a b change all characters into '1's in [a , b]
2 a b change all '0's into '1's and change all '1's into '0's in [a, b]
Out...
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其他好文 时间:
2014-08-20 12:36:52
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392
Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases.For example,"A man, a plan, a canal: Pana...
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其他好文 时间:
2014-08-19 23:57:55
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475
Given a string containing only digits, restore it by returning all possible valid IP address combinations.For example:Given "25525511135",return ["255...
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其他好文 时间:
2014-08-19 20:40:45
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203
今天在项目中用到富文本的link问题时,用到了CXAHyperlinkLabel。但是在文本内容是中文时发现会崩溃,最终定位到是在HtmlParser解析时,在_characters里面获取对应的字符串是崩溃的。 NSString?*string?=?[NS...
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其他好文 时间:
2014-08-19 14:45:55
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159
Implement wildcard pattern matching with support for'?'and'*'.'?' Matches any single character.'*' Matches any sequence of characters (including the e...
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其他好文 时间:
2014-08-19 14:24:14
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182
Given an array of words and a length L, format the text such that each line has exactly L characters and is fully (left and right) justified.You shoul...
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其他好文 时间:
2014-08-18 21:53:12
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341
Given a string s and a dictionary of words dict, add spaces in s to construct a sentence where each word is a valid dictionary word.
Return all such possible sentences....
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其他好文 时间:
2014-08-18 20:36:22
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231
leetcode中和括号匹配相关的问题共有三个,分别是:
Valid Parentheses
Given a string containing just the characters '(', ')', '{', '}', '[' and ']',
determine if the input string is valid.
The brackets m...
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其他好文 时间:
2014-08-18 20:35:52
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221
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:
2014-08-18 18:42:42
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215