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[leetcode]242.Valid Anagram
题目 Given two strings s and t , write a function to determine if t is an anagram of s. Example 1: Input: s = "anagram", t = "nagaram" Output: true Exam ...
分类:其他好文   时间:2018-10-14 14:14:27    阅读次数:133
自定义的验证码
from PIL import Image from PIL import ImageDraw, ImageFont import random def get_valid_img(request): def get_random_color(): return (random.randint(0,... ...
分类:其他好文   时间:2018-10-14 13:38:24    阅读次数:221
LeetCode 20. Valid Parentheses
Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. An input string is valid if: No ...
分类:其他好文   时间:2018-10-13 11:43:02    阅读次数:113
32. Longest Valid Parentheses
https://leetcode.com/problems/longest-valid-parentheses/description/ 来回做了好几遍,虽然AC 了但是这个解发肯定不是最优的。思路是把问题分两步解决:1. 把字符串转换成一个匹配括号的id 序列,比如第0 个和第3 个匹配了,则把0 ...
分类:其他好文   时间:2018-10-12 16:07:49    阅读次数:106
Longest Substring Without Repeating Characters
1 import java.util.Scanner; 2 3 /** 4 * Created by qmq 5 * Given a string, find the length of the longest substring without repeating characters. 6 * ... ...
分类:其他好文   时间:2018-10-12 11:57:22    阅读次数:166
242. Valid Anagram
Given two strings s and t , write a function to determine if t is an anagram of s. Example 1: Example 2: Note:You may assume the string contains only ...
分类:其他好文   时间:2018-10-11 15:44:25    阅读次数:181
32. Longest Valid Parentheses
Given a string containing just the characters '(' and ')', find the length of the longest valid (well-formed) parentheses substring. Example 1: Exampl ...
分类:其他好文   时间:2018-10-11 01:35:51    阅读次数:147
03.Longest Substring Without Repeating Characters
Longest Substring Without Repeating Characters(最长的子串不重复字符) 题目要求:给定一个字符串,找到最长的子字符串的长度,要求不重复字符。 例如: 给定一个字符串“abcabcbb”,答案是“abc”,长度是3。 给定一个字符串“bbbbb”,答案是“ ...
分类:其他好文   时间:2018-10-10 22:02:26    阅读次数:176
TCP Data Flow and Window Management(2)
Flow Control and Window Management Every TCP segment (except those exchanged during connection establishment) includes a valid Sequence Number field, ...
分类:Windows程序   时间:2018-10-08 00:40:03    阅读次数:177
[leetcode-917-Reverse Only Letters]
Given a string S, return the "reversed" string where all characters that are not a letter stay in the same place, and all letters reverse their positi ...
分类:其他好文   时间:2018-10-07 14:43:57    阅读次数:142
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