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1249. Minimum Remove to Make Valid Parentheses
Given a string s of '(' , ')' and lowercase English characters. Your task is to remove the minimum number of parentheses ( '(' or ')', in any position ...
分类:其他好文   时间:2020-02-06 14:49:15    阅读次数:69
LeetCode Solution-125
125. Valid Palindrome Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases. Note : For the pur ...
分类:其他好文   时间:2020-02-05 23:49:36    阅读次数:129
LeetCode-3. Longest Substring Without Repeating Characters
Given a string, find the length of the longest substring without repeating characters. Example 1: Input: "abcabcbb" Output: 3 Explanation: The answer ...
分类:其他好文   时间:2020-02-05 13:42:39    阅读次数:59
551. Student Attendance Record I
You are given a string representing an attendance record for a student. The record only contains the following three characters: 'A' : Absent. 'L' : L ...
分类:其他好文   时间:2020-02-05 09:48:50    阅读次数:45
[leetcode]Longest Substring with At Most K Distinct Characters
Python3,双指针,注意K为0的情况。 class Solution: def lengthOfLongestSubstringKDistinct(self, s: str, k: int) -> int: if k == 0: return 0 charMap = {} result = 0 ...
分类:其他好文   时间:2020-01-31 15:49:02    阅读次数:57
[LC] 767. Reorganize String
Given a string S, check if the letters can be rearranged so that two characters that are adjacent to each other are not the same. If possible, output ...
分类:其他好文   时间:2020-01-31 14:18:49    阅读次数:60
Tomcat 8 Invalid character found in the request target. The valid characters are defined in RFC 3986
终极解决方案: 从错误日志中看到 负责解析http请求的是 ,它对请求对URL中对字符做了限制,具体代码如下: IS_NOT_REQUEST_TARGET[]中定义了一堆not request target 转换过来就是以下字符(对应10进制ASCII),也就是URL中不能包含的特殊字符: 我碰到这 ...
分类:其他好文   时间:2020-01-30 19:32:02    阅读次数:111
PAT Advanced 1050 Broken Keyboard (20) [Hash散列]
题目 On a broken keyboard, some of the keys are worn out. So when you type some sentences, the characters corresponding to those keys will not appear on ...
分类:其他好文   时间:2020-01-28 21:29:54    阅读次数:63
PAT Advanced 1050 String Subtraction (20) [Hash散列]
题目 Given two strings S1 and S2, S = S1 – S2 is defined to be the remaining string afer taking all the characters in S2 from S1. Your task is simply to ...
分类:其他好文   时间:2020-01-28 21:02:59    阅读次数:65
PAT Advanced 1084 Broken Keyboard (20分)
On a broken keyboard, some of the keys are worn out. So when you type some sentences, the characters corresponding to those keys will not appear on sc ...
分类:其他好文   时间:2020-01-25 11:41:55    阅读次数:76
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