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【Leetcode】Evaluate Reverse Polish Notation
Evaluate the value of an arithmetic expression inReverse Polish Notation.Valid operators are+,-,*,/. Each operand may be an integer or another express...
分类:其他好文   时间:2014-08-20 13:57:52    阅读次数:176
【线段树】HDU 3397 Sequence operation 区间合并
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...
分类:其他好文   时间:2014-08-20 12:36:52    阅读次数:392
Valid Palindrome
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...
分类:其他好文   时间:2014-08-19 23:57:55    阅读次数:475
Restore IP Addresses
Given a string containing only digits, restore it by returning all possible valid IP address combinations.For example:Given "25525511135",return ["255...
分类:其他好文   时间:2014-08-19 20:40:45    阅读次数:203
initwithbytes 和 stringWithUTF8String的区别
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...
分类:其他好文   时间:2014-08-19 14:45:55    阅读次数:159
Wildcard Matching
Implement wildcard pattern matching with support for'?'and'*'.'?' Matches any single character.'*' Matches any sequence of characters (including the e...
分类:其他好文   时间:2014-08-19 14:24:14    阅读次数:182
[LeetCode] Text Justification
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...
分类:其他好文   时间:2014-08-18 21:53:12    阅读次数:341
Word Break II
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....
分类:其他好文   时间:2014-08-18 20:36:22    阅读次数:231
leetcode 之 Longest Valid Parentheses
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...
分类:其他好文   时间:2014-08-18 20:35:52    阅读次数:221
LeetCode 2 Evaluate Reverse Polish Notation
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", ...
分类:其他好文   时间:2014-08-18 18:42:42    阅读次数:215
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