URL: http://lite.ip2location.com/ Use the code below to convert the IP address of your web visitors and lookup for their geographical location, e.g. country, state, city, latitude/longitude, ZIPs, timezone and so on. Free database can be downloaded a…

In this problem, your job to write a function to check whether a input string is a valid IPv4 address or IPv6 address or neither. IPv4 addresses are canonically represented in dot-decimal notation, which consists of four decimal numbers, each ranging…

https://4sysops.com/archives/ipv6-tutorial-part-4-ipv6-address-syntax/ Now that you know about the new features of IPv6, it is time to have a closer look at the practical details. In this post, I will give a short summary about the IPv6 address synta…

IPv6 have colon character, for example FF:00::EEIf concatenate URL String, IPv6 URL will like: http://FF:00::EE:8888/a/b/cActually we want: http://[FF:00::EE]:8888/a/b/cSimply concatenate URL will cause error. Take above line for example. If not use…

B - Shorten IPv6 Address 题意 给你\(128\)位的二进制,转换为十六进制. 每\(4\)位十六进制分为\(1\)组,每两组用一个\(":"\)分开. 每一组的十六进制要去掉前导\(0\). 如果存在连续两组以上的\(0\)要转换为\("::"\).比如,\(0:0:0.0:0\)都可以转换成\("::"\). 但是最多只能转换一次,要求在长度最短的条件下字典序最小. 思路 先把二进制串转换为16进制串 找到最长连续的\…

/*===================================== IP Address Time Limit:1000MS Memory Limit:30000KB Total Submit:3394 Accepted:1530 Special Judge Description Suppose you are reading byte streams from any device, representing IP addresses. Your task is to conve…

Given a string containing only digits, restore it by returning all possible valid IP address combinations. Have you met this question in a real interview? Yes Example Given "25525511135", return [ "255.255.11.135", "255.255.111.35…

Given a string containing only digits, restore it by returning all possible valid IP address combinations. For example:Given"25525511135", return["255.255.11.135", "255.255.111.35"]. (Order does not matter) 题意:给定一由纯数字组成的字符串,以…

详见:https://leetcode.com/problems/validate-ip-address/description/ Java实现: class Solution { public String validIPAddress(String IP) { if (isIpV4(IP)) { return "IPv4"; } else if (isIpV6(IP)) { return "IPv6"; } else { return "Neither…

题意: 给你一个二进制表示的IPv6地址,让你把它转换成8组4位的16进制,用冒号分组的表示法.单组的前导0可以省略,连续多组为0的可以用两个冒号替换,但是只允许替换一次.把这个地址通过这几种省略方式,长度缩到最短,然后输出字典序最小的. 题解: 计算出八组四位16进制数的值,找出连续的0,用冒号替换即可. 坑点:1,替换连续的0的时候,一定要注意冒号不能多加 2,题目要求字典序最小,因为冒号的ascii值大于0,那就优先替换后面的,但是,同样长度的连续0,替换掉中间的,比替换掉两边的,最后得到…