user.info documentation says

No more than 10000 handles is accepted.

but in reality it accepts nowhere near that many handles. In fact, the limit has nothing to do with the number of handles. It instead depends on the number of characters in the URL. If the URL is $$$\geq$$$ 5620 characters long then the server will respond with 400 Bad Request. Can this be fixed?

So i used Arpa's bigint for today's C: https://codeforces.net/blog/entry/22566 and got skipped. Isn't it allowed to use code written before contest? What's going on here fcspartakm?

I would like to present to you an open-source competitive programming (primarily codeforces) discord bot written in python by meooow, algmyr, Narut, Rahul, pajenegod, aryaman, DeliciousFlatChest, Chilli, c1729, cfalas and mblazev. Source code is avaliable on github. If you would like to try the bot without having to set it up yourself, enter this server: discord.gg/2CJ6qvY. The bot is still work in progress, but it is already 4 months old so it can already do quite a few cool things. Here is a showcase of a subset of its features:

• It can plot rating distribution of either active or all codeforces users, in either normal or log scale, who have competed at least n times. For example, ;plot cfdistrib normal active 5 gives:

• It can also place a provided list of users on a plot of the percentile distribution of codeforces. For example, ;plot centile mblazev laggy heon +zoom

• If you're curious how the entire percentile distribution looks like ;plot centile

• It can plot codeforces rating graphs for multiple users. For example, ;plot rating mblazev heon tomx +zoom

• It can plot a histogram of problems solved by a user, color-coded by submission type. For example, ;plot solved stefdasca

• Of course, it works for multiple users as well. For example ;plot solved stefdasca pikmike

• It can even plot codeforces rating overlaid on a scatter plot of problems solved along with a running average of ratings of problems solved in practice! For example ;plot scatter pikmike

• And of course, it can also plot the rating distribution of server members. ;plot distrib

3 other plotting commands are still WIP so I will not showcase them yet. Some non-graph features include:

It also has a set of commands which we refer to as "gitgud". They are ;gitgud, ;gotgud, ;nogud, ;gudgitters and ;upsolve. They incentivize solving problems around user's rating by giving points (depending on relative difficulty) and maintaining a scoreboard. In this example, a 1900 rated user requested a 100 rating higher problem (worth 12 points):

To report a solved problem, you run ;gotgud.

To skip a problem (after at least 3 hours), you run ;nogud.

Apart from random problems, you can also gain points for ;upsolve-ing problems you failed in a contest. For example:

To display the scoreboard, run ;gudgitters

It has even more features (many of which are WIP), but I've omitted them for sake of brevity. We are also planning new features and we welcome new contributors; we'd be happy to help you find your way around the codebase. It's moderately big (3.2k lines of code, not counting comments and whitespaces) but stringent code review ensures the code remains non-terrible.

If you've come this far, just enter discord.gg/2CJ6qvY and try it out! Make sure to read ;help for more details.

My hacked solution: https://codeforces.net/contest/1132/submission/50838954

On the worst possible test (test 52):

5000 5000
1 5000
...
1 5000

It just barely passes with >255 mb used. Memory usage is high beceause I fill all of those 5000 vectors with as much as data possible. However, a slightly different test (generated hack):

5000 5000
(randomly choose 1 or 2) 5000
...

Causes MLE. How could this be? Is it possible that generator affects memory usage? It MLE on that same hack upon resubmit though.