There are many useful websites that extract data from Codeforces and give some statistics, problem recommendations, graphs, etc.
I thought that collecting them all in one place would be a good idea. Please comment the websites you find useful :D
List as of now:
CF-Predictor (Original Blog): Predicts the expected rating change during and after contests.
Code-Drills (Original Blog): Recommends problems for a list of user & gives statistics on total number of problems solved.
Codeforces Visualizer (Original Blog): Gives various statistics for a user, and supports comparison between two users.
CF Statistics (Original Blog): Comparison between 2 users gives the unique problem-set and the shared problem-set solved by the users.
Codeforced: Gives a contest-wise result of which questions have been solved and which haven't been solved (but attempted). Essentially, a complete list of "unsolved problems" as opposed to Codeforces' last 15 unsolved.
Virtual Contest Picker (Original Blog): Given a set of usernames, finds contests where none of the users have made any submissions.
Codeforces Comment/Blog Statistics (Original Blog): Gives statistics per user: No of blogs/comments/upvotes.
Codeforces Upsolving Helper (Original Blog): Returns list of all attempted problems for a user that don't have AC.
CF Notifications (Original Blog): Notifies the user of their verdict on any CF submission.
Some missing sites:
- Most popular users
are there any related to codechef or hackerearth or spoj
StopStalk here you can see statistics for various sites and you can find problems solved by other users and tag wise questions.
Thanks for this.
There is also Virtual Contest Picker
It's a collaboration between Laggy & me. You give it a set of handles and it lists all contests none of the given handles made a submission in it. We can also search that list for specific contests like CROC & AIM TECH
I'm going to restore most upvoted blogs/comments in couple of days, maybe weeks with more features(e.g. most popular comments of last month)
Blog, Stat
Auto comment: topic has been updated by Ashishgup (previous revision, new revision, compare).
You may add the Team dashboard by kostka. It is very useful. Here is the correspoding blog.
Hey Ashishgup, This is another useful tool = https://codeforces.com/blog/entry/78203 Can you add it to the blog?
This seems to be an awesome compilation of CF supplements Ashishgup can you please add codehunt to this list? https://codeforces.com/blog/entry/81053?locale=en, it has several awesome features