Website stats and analysis

A Online Judge is permanently shut down.Feel free to email [email protected] if you have a data request or something to say.Also you can find some static pages below. Ladders - Categories

2.48 Rating by Usitestat

a2oj.com was registered 1 decade 11 months ago. It has a alexa rank of #237,994 in the world. It is a domain having .com extension. It is estimated worth of $ 38,880.00 and have a daily income of around $ 72.00. As no active threats were reported recently, a2oj.com is SAFE to browse.

Traffic Report

Daily Unique Visitors: 6,447
Daily Pageviews: 25,788

Estimated Valuation

Income Per Day: $ 72.00
Estimated Worth: $ 38,880.00

Search Engine Indexes

Google Indexed Pages: Not Applicable
Yahoo Indexed Pages: Not Applicable
Bing Indexed Pages: Not Applicable

Search Engine Backlinks

Google Backlinks: Not Applicable
Bing Backlinks: Not Applicable
Alexa BackLinks: Not Applicable

Safety Information

Google Safe Browsing: No Risk Issues
Siteadvisor Rating: Not Applicable
WOT Trustworthiness: Very Poor
WOT Privacy: Very Poor
WOT Child Safety: Very Poor

Website Ranks & Scores

Alexa Rank: 237,994
PageSpeed Score: 89 ON 100
Domain Authority: 49 ON 100
Bounce Rate: Not Applicable
Time On Site: Not Applicable

Web Server Information

Hosted IP Address:

185.199.110.153

Hosted Country:

United States US

Location Latitude:

40.0656

Location Longitude:

-79.8917

Traffic Classification

Total Traffic: 81.85K
Direct Traffic: 75.09%
Referral Traffic: 2.02%
Search Traffic: 16.54%
Social Traffic: 5.80%
Mail Traffic: 0.55%
Display Traffic: 0%

Search Engine Results For a2oj.com

pratikdaigavane/A2OJ-Enhancer: Chrome extension to ... - GitHub

- https://github.com/pratikdaigavane/A2OJ-Enhancer

Chrome extension to enhance the functionality of static A2OJ site. - pratikdaigavane/A2OJ-Enhancer.


Treaps · USACO Guide

- https://usaco.guide/adv/treaps

... https://oj.uz/submission/242393. A2OJ: https://a2oj.com/category?ID=14 · https ://szkopul.edu.pl/problemset/problem/2yK6zUTXvAjhxSDfbjE4Zx7k/site/?key= ...


A2OJ Enhancer

- https://chrome.google.com/webstore/detail/a2oj-enhancer/pdcdabooahjnbjdhdipgipopcafoenke

Apr 7, 2021 ... Make A2OJ dynamic again! This chrome extension extends the functionality of A2OJ. The solved problems are highlighted in green. Some visual ...


Events - SFU Computing Science ACM Contest - Simon Fraser ...

- http://www.sfu.ca/computing/acm/events.html

Register and start solving: https://www.a2oj.com/contest?ID=31314. Solve as many problems as you can! Winter Programming Contest (2017). Teams of two ( or ...


sites like a2oj - ERA-EDTA

- https://web.era-edta.org/uploads/uses-of-maxb/sites-like-a2oj-56f799

A2 Online Judge (or Virtual Online Contests) is an online judge with hundreds of problems and it helps you to create, run and participate in virtual contests using ...


How I Make My First (real) Open Source Contribution - DEV ...

- https://dev.to/abdulrcs/how-i-make-my-first-real-open-source-contribution-5329

Jun 21, 2021 ... There's this site called A2 Online Judge (A2OJ) that have a ladder of problem that we can follow based on difficulty and Codeforces Rating, ...


Is A2oj.com Down Right Now? - A2oj.com not working

- https://issitedownrightnow.com/status/a2oj.com

Trying opening a2oj.com but the site is not working and appears offline today? Check issue below if it's down for everyone else or just you! Server Status. UP.


a2oj - githubmemory

- https://githubmemory.com/repo/subodhk01/a2oj/activity

⚡ Dynamic A2OJ - A dynamic version of the all time favourite A2OJ ladder. CITIZENDOT Updated 1 week ago. fork time in 13 hours ago. Activity icon.


Suggest some good problems for dsa practice - help - CodeChef ...

- https://discuss.codechef.com/t/suggest-some-good-problems-for-dsa-practice/68503

Jun 12, 2020 ... Try out https://www.a2oj.com/Categories.html. There are SPOJ problems under each topic. 1 Like. swathi_vennela June 12, 2020, 6:26pm #3.


Sahil Prakash - Software Development Engineer 2 - Amazon ...

- https://www.linkedin.com/in/sahil-prakash-9371767a

I'm sadly announcing that a2oj.com (A2… · Today, I am very shocked and… · Kudos to #swiggy Data Science team, out…


Static A2OJ

- https://a2oj.com/

A2 Online Judge is permanently shut down. Feel free to email [email protected] if you have a data request or something to say. Also you can find some static ...


Announcement - FAQ about the migration to DMOJ - PEG Judge

- https://wcipeg.com/announcement/9385

Jun 24, 2020 ... I remember that, once, the owner of a2oj.com signaled that he is about to close his site and immediately received enough money. I am sure that ...


Runtime Error - C Programming , No Error on IDE - Stack Overflow

- https://stackoverflow.com/questions/41361195/runtime-error-c-programming-no-error-on-ide

Here's the description of the problem https://a2oj.com/p?ID=193 , it works very well on Visual Studio but for some reason it produces Runtime - Error on the ...


Advice on crafting competitive programming training schedule ...

- https://www.reddit.com/r/programmingcontests/comments/glsj8n/advice_on_crafting_competitive_programming/

May 18, 2020 ... For Codeforces try a2oj.com, and solve problems by difficulty levels. 2. Reply ... a2oj.com. awesome! Thanks. 1. Reply. View all 4 comments ...


Job: A2OJ Code Battle in Cairo, Egypt | WUZZUF

- https://wuzzuf.net/jobs/p/94251-A2OJ-Code-Battle-Cairo-Egypt

A2OJ Code Battle is Egypt's first programming competition, designed for Egyptian coders who have a passion for programming and a willingness to prove ...


Getting Started with Competitive Programming | by SARVESH ...

- https://becominghuman.ai/getting-started-with-competitive-programming-f6f72f4f0228

Apr 14, 2020 ... Codeforces is the best platform for any competitive programmer to be on! Solve all the problems from the below list: https://www.a2oj.com/ ...


▷ a2oj.Herokuapp.com : Dynamic A2OJ - IPAddress.com

- https://herokuapp.com.ipaddress.com/a2oj.herokuapp.com

Easily track your ladder progress with the new A2OJ. Website Host, https://a2oj. herokuapp.com. Server Software, gunicorn/20.0.4. DNS Resource Records ...


HackerRank Hires Google Code Jam's Ahmed Aly - Business - Insider

- https://www.businessinsider.com/hackerrank-hires-google-code-jam-ahmed-aly-2015-9

Sep 1, 2015 ... ... a one-time finalist in the ACM-ICPC contest. In fact, Aly loves programming contests so much, he's owned and operated his own: A2OJ.com.


Olimpiada Boliviana de Informatica - Oruro (2021)

- https://www.schoolandcollegelistings.com/XX/Unknown/212500585529468/Olimpiada-Boliviana-de-Informatica---Oruro

a2oj.com A2 Online Judge (or Virtual Online Contests) is an online judge with hundreds of problems and it helps you to create, run and participate in virtual ...


SPOJ.com - Problem PRATA

- https://www.spoj.com/problems/PRATA/cstart=20

May 14, 2011 ... Can anyone tell me why this one is in the segment tree category here (https://a2oj .com/category?ID=25). darshan_07: 2020-08-01 18:35:31.


courses:a4b36acm2:soutezni_akce [CourseWare Wiki]

- https://cw.fel.cvut.cz/b172/courses/a4b36acm2/soutezni_akce

Feb 21, 2018 ... Příprava na CERC 2014 (účast FEL, FIT, MFF). 4.11.2014 Přípravný contest CVUT http://a2oj.com/Contest.jsp?ID=14442. 11.11.2014 Druhý ...


Does a2oj Ladder really works ? - Codeforces

- https://codeforces.cc/blog/entry/48872

I'm currently trying to improve my problem solving skills to score high here! Recently a friend of mine suggested that I should start solving the a2oj Ladder ( which I ...

Page Resources Breakdown

Homepage Links Analysis

Website Inpage Analysis

H1 Headings: Not Applicable H2 Headings: Not Applicable
H3 Headings: Not Applicable H4 Headings: Not Applicable
H5 Headings: Not Applicable H6 Headings: Not Applicable
Total IFRAMEs: Not Applicable Total Images: 1
Google Adsense: Not Applicable Google Analytics: UA-16947566-3

Two Phrase Analysis

Words Occurrences Density Possible Spam
say Also 1 2.778 % No
Also you 1 2.778 % No
to say 1 2.778 % No
something to 1 2.778 % No
request or 1 2.778 % No
or something 1 2.778 % No
you can 1 2.778 % No
can find 1 2.778 % No
below Ladders 1 2.778 % No
Ladders Categories 1 2.778 % No
pages below 1 2.778 % No
static pages 1 2.778 % No
find some 1 2.778 % No
some static 1 2.778 % No
data request 1 2.778 % No
a data 1 2.778 % No
shut down 1 2.778 % No
down Feel 1 2.778 % No
permanently shut 1 2.778 % No
is permanently 1 2.778 % No

Four Phrase Analysis

Words Occurrences Density Possible Spam
say Also you can 1 2.778 % No
Also you can find 1 2.778 % No
to say Also you 1 2.778 % No
something to say Also 1 2.778 % No
request or something to 1 2.778 % No
or something to say 1 2.778 % No
you can find some 1 2.778 % No
can find some static 1 2.778 % No
below Ladders Categories 1 2.778 % No
Ladders Categories 1 2.778 % No
pages below Ladders Categories 1 2.778 % No
static pages below Ladders 1 2.778 % No
find some static pages 1 2.778 % No
some static pages below 1 2.778 % No
data request or something 1 2.778 % No
a data request or 1 2.778 % No
shut down Feel free 1 2.778 % No
down Feel free to 1 2.778 % No
permanently shut down Feel 1 2.778 % No
is permanently shut down 1 2.778 % No

Websites Hosted on Same IP (i.e. 185.199.110.153)

fastSWF - Free Flash and Unity Hosting

- fastswf.com

A free Flash and Unity hosting site for your creations. Easily upload your swf and unity3d files and share them with friends.

  Not Applicable   $ 8.95

tiddlywiki.org — community matters for TiddlyWiki

- tiddlywiki.org

  2,439,354   $ 480.00

Mark S. Rasmussen

- improve.dk

  10,929,006   $ 8.95

pagefault | 但行好事 莫問前程

- pagefault.info

  Not Applicable   $ 8.95

Rob Cleaton – Product Designer

- warface.co.uk

  6,359,587   $ 240.00

HTTP Header Analysis

Http-Version: 1.1
Status-Code: 200
Status: 200 OK
Connection: keep-alive
Content-Length: 677
Server: GitHub.com
Content-Type: text/html; charset=utf-8
Last-Modified: Tue, 09 Mar 2021 07:31:27 GMT
Access-Control-Allow-Origin: *
ETag: W/"6047244f-456"
expires: Thu, 08 Jul 2021 11:13:55 GMT
Cache-Control: max-age=600
Content-Encoding: gzip
x-proxy-cache: MISS
X-GitHub-Request-Id: 62B6:65E3:1B152AC:1BE76E4:60E6DB9B
Accept-Ranges: bytes
Date: Thu, 08 Jul 2021 14:52:50 GMT
Via: 1.1 varnish
Age: 0
X-Served-By: cache-fra19176-FRA
X-Cache: MISS
X-Cache-Hits: 0
X-Timer: S1625755971.663264,VS0,VE88
Vary: Accept-Encoding
X-Fastly-Request-ID: 2bf21ef5563eee70db8135bab5f3ceda2b86e3d4

Domain Information

Domain Registrar: Google LLC
Registration Date: 2013-12-21 1 decade 11 months 2 days ago
Last Modified: 2019-11-07 5 years 2 weeks 4 days ago

Domain Nameserver Information

Host IP Address Country
ns-cloud1.googledomains.com 216.239.32.106 United States United States
ns-cloud2.googledomains.com 216.239.34.106 United States United States
ns-cloud3.googledomains.com 216.239.36.106 United States United States
ns-cloud4.googledomains.com 216.239.38.106 United States United States

DNS Record Analysis

Host Type TTL Extra
a2oj.com A 3598 IP: 185.199.111.153
a2oj.com A 3598 IP: 185.199.108.153
a2oj.com A 3598 IP: 185.199.110.153
a2oj.com A 3598 IP: 185.199.109.153
a2oj.com NS 21600 Target: ns-cloud3.googledomains.com
a2oj.com NS 21600 Target: ns-cloud4.googledomains.com
a2oj.com NS 21600 Target: ns-cloud1.googledomains.com
a2oj.com NS 21600 Target: ns-cloud2.googledomains.com
a2oj.com SOA 21600 MNAME: ns-cloud1.googledomains.com
RNAME: dns-admin.google.com
Serial: 103
Refresh: 21600
Retry: 3600
Expire: 1209600
a2oj.com MX 3600 Priority: 20
Target: alt2.gmr-smtp-in.l.google.com
a2oj.com MX 3600 Priority: 30
Target: alt3.gmr-smtp-in.l.google.com
a2oj.com MX 3600 Priority: 40
Target: alt4.gmr-smtp-in.l.google.com
a2oj.com MX 3600 Priority: 10
Target: alt1.gmr-smtp-in.l.google.com
a2oj.com MX 3600 Priority: 5
Target: gmr-smtp-in.l.google.com
a2oj.com TXT 3600 TXT:
google-site-verification=XqJcp122agPCIEt
utD1mS55Oy6YNydKHP8juPy7jLK8

Top Organic Keyword

1. a2oj ladder
2. a2oj
3. a2oj ladders
4. a20j ladders
5. a20j ladder

Top Paid Keyword

Not Applicable

Top Referral Site

1. codeforces.com
2. medium.com
3. plzrun.tistory.com
4. github.com
5. wiki.metakgp.org

Top Destination Site

1. uva.onlinejudge.org
2. icpcarchive.ecs.baylor.edu
3. onlinejudge.org

Full WHOIS Lookup

Domain Name: A2OJ.COM
Registry Domain ID:
1839858819_DOMAIN_COM-VRSN
Registrar WHOIS Server:
whois.google.com
Registrar URL:
http://domains.google.com
Updated Date:
2019-11-06T22:59:44Z
Creation Date:
2013-12-20T18:00:24Z
Registry Expiry Date:
2022-12-20T18:00:24Z
Registrar: Google LLC
Registrar IANA ID:
895
Registrar Abuse Contact Email:
[email protected]
Registrar Abuse Contact Phone:
+1.8772376466
Domain Status: clientTransferProhibited
https://icann.org/epp#clientTransferProhibited
Name Server:
NS-CLOUD1.GOOGLEDOMAINS.COM
Name Server:
NS-CLOUD2.GOOGLEDOMAINS.COM
Name Server:
NS-CLOUD3.GOOGLEDOMAINS.COM
Name Server:
NS-CLOUD4.GOOGLEDOMAINS.COM
DNSSEC: signedDelegation
DNSSEC DS
Data: 30059 8 2
C123131D9151C0DA4D0CD292A225307F589CD5010F1C19F2118C73795B9B512B
U
RL of the ICANN Whois Inaccuracy Complaint Form:
https://www.icann.org/wicf/
>>> Last update of whois database:
2021-07-08T14:52:38Z

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