Ramadan mubarak to all my muslim brothers , hope you have a good month and good fasting and prayers !

Hi codeforces

I was solving this problem:
You are given an undirected graph consisting of n vertices and n edges. It is guaranteed that the given graph is connected (i. e. it is possible to reach any vertex from any other vertex) and there are no self-loops and multiple edges in the graph.

Your task is to calculate the number of simple paths of length at least 1 in the given graph. Note that paths that differ only by their direction are considered the same (i. e. you have to calculate the number of undirected paths). For example, paths [1,2,3] and [3,2,1] are considered the same.

But I didn't notice that it has n edges (thought it had m edges which is given in the input), but I didn't find an answer better than n^2

so I want to ask , does anybody know a faster solution for the new problem(m edges )

Thanks!

Hello Codeforces!

In the last few weeks(after I saw a round made by Experts and CMs) I thought about authoring some problems , just to have fun with my friends or to submit it to some CP website .

But I found it really hard to find a good idea for a problem which isn't the same or like some problem I solved before .

So I just want to ask high-rated coders and problem setters , are there some steps you follow when you want to make a new problems ?

Do you for example set some algorithm or topic before starting or just think for some problem then solve it

Thanks !

The situation is very bad , a lot of people are homeless and hundreds are still not found . Please pray for us and if you can donate it is very helpful

As 2022 is coming to an end , there is no more time to achieve the goals we wanted in it .

So what are the goals you put before 2022 and you achieved , and what goals remain to 2023 to happen ?

For me the goals I didn't manage to achieve and I hope to make them true in 2023:

• Qualify to IOI 2022 : I was the 5th in the deciding contest and only top 4 go to IOI ): hope i make it to IOI 2023

• Reach CM: didn't happen but I was near

• Go to ACPC teens : I couldn't participate in the first round

Goals I managed to achieve :

• Qualified to IIOT 2022 and got a bronze medal

Looking forward to reading yours !

Anyway , Happy New Year to you all and I hope you achieve all your dreams in 2023!

Hi codeforces

Today I found out that my solution for problem C last contest is skipped due to similarity with some other people , and this is really annoying because I am not a cheater

The code is really simple ( here is mine 180626136 ) and that's why any person.with the same idea will have a similar code Here is the code which skipped me 180640624

I didn't share my code with any person and I didn't use ideone or any other online compiler

You can look in my account and see that I was never a cheater and I am a person who wants to improve and doesn't really care about the rating

CODEFORCES was and always will be a fair place , but it's not fair that I get a skipped and some people who really cheat don't get it

That's why I ask MikeMirzayanov for help and to get my rating back

Or at least remove the skipped because I am not a cheater

Hello codeforces!

About 10 months ago,I reached Expert after two years of practicing (well , I wasn't really practicing then )

But since being an expert , I nearly didn't miss a contest unless I wasn't able to participate , but I'm still going up and down in expert (and sometimes specialist too) , and I reached a rate more than 1800 only once, although I have some contests with a master performance.

And unfortunately, I accepted Ali_ZaiBug 's challenge that if i don't reach purple before the first of November(which is very soon) , he will upload a post on facebook laughing on me ):

Well, I don't really care about the post, but I want to reach purple before 2023.

So can I have some advices please ?

Thanks !