shishyando's blog

Codeforces Round #708
By shishyando, history, 4 years ago, translation, In English

Hello again, Codeforces!

Artyom123 and I are happy to invite you to Codeforces Round 708 (Div. 2), which will take place on Mar/17/2021 17:35 (Moscow time). This round will be rated for the participants with rating lower than 2100

These are some awesome people that we would like to thank:

You will have 2 hours to solve 5 problems (and 2 subtasks). This time the statements are not related to Valorant, but we still play it sometimes.

We hope that you will like all problems and you won't face any troubles during the contest. Good luck!

The scoring distribution: 500 — 750 — (750 + 500) — 1750 — (1500 + 1500)

UPD: Editorial

  • Vote: I like it
  • +781
  • Vote: I do not like it

Comments Comments (186)
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4 years ago, # |
  Vote: I like it -68 Vote: I do not like it

Has anyone heard about Hsoowedar Algorithm?

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4 years ago, # |
  Vote: I like it +20 Vote: I do not like it

So early Score Distribution

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4 years ago, # |
  Vote: I like it +14 Vote: I do not like it

good luck to everyone!

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4 years ago, # |
  Vote: I like it +15 Vote: I do not like it

I don't know what is subtask, can you please explain it a bit?

Does it mean there's a C1, C2, E1, E2?

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4 years ago, # |
← Rev. 2   Vote: I like it +1 Vote: I do not like it

I think as usual C2 will be harder than C1 and E2 will be harder then E1.

Question: why score for C1 is higher than score for C2 and score for E1 is equal to score for E2 ?

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4 years ago, # |
  Vote: I like it +76 Vote: I do not like it

As a good tester, I was invited as a tester and I can test the round again! I hope you're enjoying the round!

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4 years ago, # |
  Vote: I like it +15 Vote: I do not like it

Hoping for short statements just like round announcement ^_^

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4 years ago, # |
  Vote: I like it +51 Vote: I do not like it

As a Tester it was grater experience to solve problems!

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4 years ago, # |
  Vote: I like it +4 Vote: I do not like it

Good luck everyone! Hope I can become master at once.

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4 years ago, # |
  Vote: I like it +90 Vote: I do not like it

As a tester, I want something and you all know what I want. So please.....

PS
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    4 years ago, # ^ |
      Vote: I like it 0 Vote: I do not like it

    As a tester, you should complain if the statements are not clear beforehand to ensure that they are (;

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    4 years ago, # ^ |
      Vote: I like it 0 Vote: I do not like it

    What about test cases?

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      4 years ago, # ^ |
        Vote: I like it +16 Vote: I do not like it

      Testers can't know much about test cases; the most they can do is submit wrong solutions and see if they get WA/TLE or not.

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4 years ago, # |
  Vote: I like it +13 Vote: I do not like it

I'm curious how shishyando proposed this round because as far as I know, you should be Orange (2100+) to propose the round.

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4 years ago, # |
← Rev. 2   Vote: I like it 0 Vote: I do not like it

This is the fastest score distribution I've ever seen. I think this will be a hard round for me...
I've just get a -33 $$$\Delta$$$ rating in the last contest. Hope I'll break this streak soon in this contest or I'll return to a pupil. :/ Wish me luck :)

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    4 years ago, # ^ |
    ← Rev. 2   Vote: I like it 0 Vote: I do not like it

    Actually not that difficult...
    I've solved A,B,C(both C1 and C2) in this contest... The best performance I've ever had since my first contest...
    But it's sad that it has gotten unrated :(

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4 years ago, # |
← Rev. 2   Vote: I like it +4 Vote: I do not like it

.

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4 years ago, # |
  Vote: I like it +51 Vote: I do not like it
Maymay
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4 years ago, # |
  Vote: I like it +15 Vote: I do not like it

Привет shishyando, your last contest had a nice problemset, specially loved Sage's Birthday.

But a lot of subissions had FST on Problem A. Let's hope for strong pretests and a smoother experience this time.

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4 years ago, # |
  Vote: I like it +3 Vote: I do not like it

All the best everyone!!!

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4 years ago, # |
  Vote: I like it +4 Vote: I do not like it

I hope everyone gets high delta and learns some new things from problems.

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4 years ago, # |
  Vote: I like it +2 Vote: I do not like it

Pretests(even system tests) are not strong enough in your last round,plz make stronger tests for this round

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4 years ago, # |
  Vote: I like it +1 Vote: I do not like it

Just love the short and crisp announcement of this round.

Hope to have them implemented in problem statements as well. :-)

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    4 years ago, # ^ |
      Vote: I like it 0 Vote: I do not like it

    Unfortunately solved till c1 and got to know that contest is declared unrated.

    A fair decision. :)

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4 years ago, # |
  Vote: I like it 0 Vote: I do not like it

what an epic score distribution, looking forward to the contest

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4 years ago, # |
  Vote: I like it -108 Vote: I do not like it

i want to see constructive problems!

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    4 years ago, # ^ |
      Vote: I like it -147 Vote: I do not like it

    okay i don't want to see that So stop downvotes please~~

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      4 years ago, # ^ |
      ← Rev. 2   Vote: I like it +225 Vote: I do not like it

      Now you are eligible to get downvote from those 2

      1
      2
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        4 years ago, # ^ |
          Vote: I like it -23 Vote: I do not like it

        Now you are eligible to get +delta contribution for such 2 argument

        1
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      4 years ago, # ^ |
        Vote: I like it +56 Vote: I do not like it

      looks like people who love constructives are winning

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4 years ago, # |
  Vote: I like it +3 Vote: I do not like it

4 contests within 6 days.....<3...... Week Of contests.......

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4 years ago, # |
← Rev. 3   Vote: I like it +8 Vote: I do not like it

As a participant I want to see problems with short and clear statements and without any legends stories and histories.

And I am sure that many participants want to see this like me.

Good luck to everyone!

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4 years ago, # |
  Vote: I like it -6 Vote: I do not like it

I am ready to solve one problem ,just one !

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4 years ago, # |
  Vote: I like it 0 Vote: I do not like it

good luck everyone!

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4 years ago, # |
← Rev. 4   Vote: I like it -22 Vote: I do not like it

.

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4 years ago, # |
← Rev. 2   Vote: I like it +10 Vote: I do not like it

.

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    4 years ago, # ^ |
      Vote: I like it 0 Vote: I do not like it

    An online game, just like counter strike.

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      4 years ago, # ^ |
        Vote: I like it +15 Vote: I do not like it

      His next question: What is counter strike?

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        4 years ago, # ^ |
          Vote: I like it +26 Vote: I do not like it

        An online game, just like valorant :)

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          4 years ago, # ^ |
            Vote: I like it +2 Vote: I do not like it

          What is an online game?

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            4 years ago, # ^ |
              Vote: I like it -11 Vote: I do not like it

            Valorant. -> What is valorant? -> Counter strike. -> What is counter strike? -> Valorant. -> What is valorant? -> ......

            It looks like an endless cycle :-)

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    4 years ago, # ^ |
      Vote: I like it +1 Vote: I do not like it

    You can just simply google it.

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4 years ago, # |
  Vote: I like it +4 Vote: I do not like it

Are the statements about metro game? "Artyom" is the main protagonist from that game.

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4 years ago, # |
  Vote: I like it -12 Vote: I do not like it

Its always nice to get downvoted

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4 years ago, # |
  Vote: I like it 0 Vote: I do not like it

Evidently it will be speedforces. May the fastest win.

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4 years ago, # |
  Vote: I like it 0 Vote: I do not like it

Hi my name is Oleg Dudka!!! Where can i find Alexandr Malkov from Sovetsk (Kirovskaya Oblast)>

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4 years ago, # |
  Vote: I like it -6 Vote: I do not like it

I can bet this is gooing to be speedforces with very less difficulty gap among initial few questin and then a big gap between any two

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4 years ago, # |
  Vote: I like it 0 Vote: I do not like it

Russia is an actually a good country :D

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4 years ago, # |
  Vote: I like it +7 Vote: I do not like it

2 Subtasks. Uh-oh. Stinky...

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4 years ago, # |
← Rev. 2   Vote: I like it +19 Vote: I do not like it

Is it still rated ?

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    4 years ago, # ^ |
      Vote: I like it 0 Vote: I do not like it

    As We m1.codeforces , m2.codeforces , m3.codeforces were working fine I think and I hope not

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      4 years ago, # ^ |
      ← Rev. 2   Vote: I like it +3 Vote: I do not like it

      Well m3 couldnt load problems for me but if they didnt announced during the contest that it will be unrated, then it will probably be rated i guess ?

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        4 years ago, # ^ |
        ← Rev. 2   Vote: I like it 0 Vote: I do not like it

        They have also put a reminder to use the alternate sites long ago.And alternate sites are made for such situations only. So it should be rated I think.

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4 years ago, # |
← Rev. 3   Vote: I like it -18 Vote: I do not like it

.

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4 years ago, # |
← Rev. 2   Vote: I like it +29 Vote: I do not like it

"Currently, we don't see reasons to make the round unrated.". Get yourself a pair of glasses or something I don't know, we can't really help with that.

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4 years ago, # |
  Vote: I like it +44 Vote: I do not like it

Maybe the argument that we should've used m1/m2/m3 would hold some water if the links to those websites were always available when we tried accessing the main site. As it happens, there was a long period (at least 10 mins) when the website just said 'Redirecting. Please wait.' And so I waited as instructed....

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    4 years ago, # ^ |
    ← Rev. 3   Vote: I like it +9 Vote: I do not like it

    Round should be unrated . CF ranking is based on how fast we solve , extending round is not solution . For being fair it should be unrated .

    Also i was not able to open m3,m1 too . m2 opened after sometime. I think contest admins are sensible enough to make this unrated .

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    4 years ago, # ^ |
      Vote: I like it +17 Vote: I do not like it

    It was well over 10 minutes for sure

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4 years ago, # |
  Vote: I like it +83 Vote: I do not like it

There is no justice in this world.

Round with such beautiful questions goes unrated.

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4 years ago, # |
  Vote: I like it +2 Vote: I do not like it

bad luck for me..first time I have solved 4 problems in contest time..but unfortunatly round in unrated :(

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4 years ago, # |
  Vote: I like it +5 Vote: I do not like it

It is a an amazing round, the problems are really very interesting, doesn't matter if it became unrated. Thanks for the round!

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4 years ago, # |
  Vote: I like it +22 Vote: I do not like it

I feel like My DP

Indians can relate.

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4 years ago, # |
  Vote: I like it -7 Vote: I do not like it

Thats a big bruh.

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    4 years ago, # ^ |
      Vote: I like it 0 Vote: I do not like it

    After round got extended I was confident that round will be rated and I will get my +100 for solving 5 problems.

    My disappointment is immeasurable and my day is ruined

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      4 years ago, # ^ |
        Vote: I like it -10 Vote: I do not like it

      true ... i also solved 5 problems and was expecting positive delta then they announced the round unrated

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        4 years ago, # ^ |
          Vote: I like it +4 Vote: I do not like it

        PeopleWithBadLuck++; // same situation

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4 years ago, # |
  Vote: I like it +7 Vote: I do not like it

Couldn't you "maintain" the processing speed of the server? I'm looking forward to the next contest.

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4 years ago, # |
  Vote: I like it +20 Vote: I do not like it

Me : Having a great round after an eternity
CF : Let's make this round Unrated

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4 years ago, # |
← Rev. 2   Vote: I like it +12 Vote: I do not like it

Why did the round get unrated? After I got the message "Redirecting... please wait" I immediately went to m1.codeforces.com which was working flawlessly. After that I didn't have any issues. Even if some people didn't know about the lightweight versions, it was only down for 15 minutes (for me), so the 15 minute bonus would solve the problem for them. Would someone mind explaining why the round got unrated? (btw, what a waste, the problems were very cool)

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    4 years ago, # ^ |
    ← Rev. 2   Vote: I like it +1 Vote: I do not like it

    That's true. Actually, I got into m1 after the contest started and, even the main website wasn't working well it was still working perfectly in m1. I can't understand why they wasted time in the main website :(

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4 years ago, # |
  Vote: I like it +6 Vote: I do not like it

AC 5 problems and round unrated :(

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4 years ago, # |
  Vote: I like it +25 Vote: I do not like it

Big heart break after a nice contest, but I appreciate the quality of the problems

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4 years ago, # |
← Rev. 2   Vote: I like it +12 Vote: I do not like it

I don't think blog should be downvoted . I don't see how problem setters are responsible for round being unrated . Infact it's sad for them too , their round having good problems got unrated.

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4 years ago, # |
  Vote: I like it +8 Vote: I do not like it

From last 2-3 days also, I am experiencing similar technical difficulties during normal problem solving practice. Don't know if the issue is from CF or my ISP.

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4 years ago, # |
  Vote: I like it +9 Vote: I do not like it

Lets vote to make this round rated again! Problems are very good, m1.codeforces.com worked perfectly, pls make it rated!

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    4 years ago, # ^ |
      Vote: I like it +11 Vote: I do not like it

    I think once this decision is made it can not be cancelled.

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    4 years ago, # ^ |
      Vote: I like it +15 Vote: I do not like it

    Agree, there is no reason for this to be unrated

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      4 years ago, # ^ |
        Vote: I like it 0 Vote: I do not like it

      Yeah but after announcing unrated in the middle of contest, it cannot be made rated now.

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    4 years ago, # ^ |
      Vote: I like it +6 Vote: I do not like it

    That's not possible.. many of participants would have quit solving already . So , it would be unfair to them .

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      4 years ago, # ^ |
        Vote: I like it -8 Vote: I do not like it

      Btw, admins can make round unrated for that users, which are disagree with their standings, because i tried hard 2h and its unrated((

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        4 years ago, # ^ |
          Vote: I like it +2 Vote: I do not like it

        Yea it is frustrating. But just keep giving contests with consistency :) All the best for the future rounds

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    4 years ago, # ^ |
      Vote: I like it +6 Vote: I do not like it

    It isn't fair for a big number of participants if this round becomes rated and they also took the decision (of making the round unrated) after some delay and discussion. So I don't think it'll be rated again.

    P.S. I also wish it was rated coz I also solved 5 problems and had a good rank T — T

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4 years ago, # |
  Vote: I like it +4 Vote: I do not like it

Speedforces.

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4 years ago, # |
  Vote: I like it +13 Vote: I do not like it

Problem statements were to the point, Thanks for this wonderful round.

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4 years ago, # |
  Vote: I like it -15 Vote: I do not like it

Just change the Author to Codeforces...

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4 years ago, # |
  Vote: I like it +4 Vote: I do not like it

It is unrated now.

Why this kind of round that has huge difficulty span can be here for us?

I don't understand.

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    4 years ago, # ^ |
      Vote: I like it -12 Vote: I do not like it

    You are right, we don't need this kind of junk to waste 2+ hours on.

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4 years ago, # |
  Vote: I like it +6 Vote: I do not like it

Adding 15 mins did enough justice. Should have been rated.

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4 years ago, # |
  Vote: I like it 0 Vote: I do not like it

Make it rated please... solved upto E1 but round goes unrated (#sed life)

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4 years ago, # |
← Rev. 2   Vote: I like it +17 Vote: I do not like it

Loved the problems! amazing work shishyando and Artyom123! If the round was extended , then I feel there was no need of making it unrated. MikeMirzayanov I feel , this round should be rated:
A) Because m1.codeforces,m2.codeforces,m3.codeforces were working perfectly
B) There was clear instructions given to use the lightweight website
C) There was 15 mins compensation , so basically no (almost no) time was lost

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    4 years ago, # ^ |
      Vote: I like it +3 Vote: I do not like it

    Yes, it should be rated.

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    4 years ago, # ^ |
      Vote: I like it 0 Vote: I do not like it

    Hope so

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    4 years ago, # ^ |
      Vote: I like it 0 Vote: I do not like it

    I also think it should be rated,there was lots of hard work of writer,tester to make this round,hope to become rated .

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      4 years ago, # ^ |
        Vote: I like it +5 Vote: I do not like it

      No hard work will go in vain. People can still use these problems for practice and learning.

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4 years ago, # |
← Rev. 2   Vote: I like it -6 Vote: I do not like it

people who wrote "i liked problems" solved only AB and may be C. And they don't know that D and E are garbage...

upd: ok i am sorry D is fine

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    4 years ago, # ^ |
      Vote: I like it +11 Vote: I do not like it

    In fact, I solved E1.But I still like the problems.

    Because I want this round to be RATED!

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4 years ago, # |
  Vote: I like it +6 Vote: I do not like it

Problems are definitely not good. A and B are fine. But C1 and C2 is a very trivial constructive problem that doesn't meet the difficulty of usual C problems. Also, the only thing you need to know for E1 is prime factorization, I simply don't understand why E1 deserves 1500.

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    4 years ago, # ^ |
    ← Rev. 2   Vote: I like it 0 Vote: I do not like it

    I can't even understand how isaf27 accepted E1... This problem just no idea and nothing interesting

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      4 years ago, # ^ |
        Vote: I like it 0 Vote: I do not like it

      E1 is 1500 point. What to expect? And E2 is kinda nice. No time to implement my idea sadly

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        4 years ago, # ^ |
          Vote: I like it 0 Vote: I do not like it

        E1 deserves only like 1250, if E2 wasn't present it should probably at C in a normal contest.

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        4 years ago, # ^ |
          Vote: I like it 0 Vote: I do not like it

        bruh what? if problem costs 1500 it can be shitty? are you ok?

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          4 years ago, # ^ |
            Vote: I like it 0 Vote: I do not like it

          Isn't it a good pick for C? And normally C is worth of 1500

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            4 years ago, # ^ |
              Vote: I like it +11 Vote: I do not like it

            i think this problem is just bad, and it's position in contest doesnt matter

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    4 years ago, # ^ |
      Vote: I like it +9 Vote: I do not like it

    E1 was free points honestly

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    4 years ago, # ^ |
      Vote: I like it 0 Vote: I do not like it

    E1 is a (maybe simple) math problem.

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    4 years ago, # ^ |
      Vote: I like it +5 Vote: I do not like it

    Agreed, I don't think E1 should be added in this problem set.

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4 years ago, # |
  Vote: I like it +33 Vote: I do not like it

Gentle reminder:

The authors did a really good job. And they have nothing to do with the round being unrated.

Please do not downvote this blog. This is just dumping away the authors' hard work.

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4 years ago, # |
← Rev. 2   Vote: I like it +17 Vote: I do not like it

I don't understand why admins don't make any test-contest of length 10-20 minutes after changes in Codeforces, to check whether server is working correcly or not.

Yesterday Codeforces wasn't availabe for hours, I think that it will be right to make test-contest for not disappointing participants and authors especially.

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    4 years ago, # ^ |
      Vote: I like it 0 Vote: I do not like it

    This was tried by Codechef before. They created an unrated div 3 round after server upgrade but since the round was unrated, very few contestant turned up.

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      4 years ago, # ^ |
        Vote: I like it +1 Vote: I do not like it

      As I remember when Codeforces did test-contest, problems were very easy and around 2000-3000 participants were submitting code after 2 minutes and I think that this is better than doing nothing.

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    4 years ago, # ^ |
      Vote: I like it +27 Vote: I do not like it

    Test contests do not have so many participants. And the reason is not in the number of users. In short, I'm not sure if the issue would be reproduced in the test round.

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4 years ago, # |
  Vote: I like it +6 Vote: I do not like it

I just laugh over codechef, in jan lunch time their website didn't worked for half time still they made it rated.

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4 years ago, # |
  Vote: I like it +15 Vote: I do not like it

Can't understand why the downvotes to this blog...

It's not the authors and testers' fault but just the problem of the system...

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    4 years ago, # ^ |
      Vote: I like it -21 Vote: I do not like it

    Problem D and E are GARBAGE, that's why this round is unrated.

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      4 years ago, # ^ |
        Vote: I like it +12 Vote: I do not like it

      Even c2 was no different than c1 only one was sufficient

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      4 years ago, # ^ |
        Vote: I like it 0 Vote: I do not like it

      I think D and E2 are interesting problems, it's just E1 that was not good.

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4 years ago, # |
  Vote: I like it 0 Vote: I do not like it

Could you please tell me how to solve Problem D? I have no idea :(

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4 years ago, # |
  Vote: I like it -10 Vote: I do not like it

I have a solution for E2 in $$$O(nkLOG)$$$ with binary search on segtree. Couldn't debug in time. Is it intended?

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    4 years ago, # ^ |
      Vote: I like it 0 Vote: I do not like it

    My pretest passed solution is $$$O(nk^2)$$$.

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4 years ago, # |
  Vote: I like it 0 Vote: I do not like it

Thanks for the great contest! Cool problems.

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4 years ago, # |
  Vote: I like it +6 Vote: I do not like it

Just had a look at the random solution of C2 and damn. I feel so worthless.

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    4 years ago, # ^ |
      Vote: I like it +3 Vote: I do not like it

    Actually C2 is very easy...

    You just need to add one line in the code of C1 and you passed...

    At least for me...

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      4 years ago, # ^ |
        Vote: I like it +3 Vote: I do not like it

      Exactly. I did C1 an hour ago and making all type of useless algos for C2. :(

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    4 years ago, # ^ |
      Vote: I like it 0 Vote: I do not like it

    Yup agreed, I was breaking my head for some complicated af solution.

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4 years ago, # |
  Vote: I like it +239 Vote: I do not like it

Friends, I apologize that the round was not rated. Please do not downvote the writers. They are definitely not to blame. I figure out what happened. Not very clear yet. We easily hosted noticeably larger rounds. Probably influenced by yesterday's software update. We took advantage of the power outage to update the servers. I am in the process of investigating the issue.

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4 years ago, # |
  Vote: I like it 0 Vote: I do not like it

Why problem D was the hardest one?

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4 years ago, # |
← Rev. 2   Vote: I like it -32 Vote: I do not like it

Their should be a testing round before this contest.

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    4 years ago, # ^ |
      Vote: I like it +6 Vote: I do not like it

    The round was just unrated, it wasn't canceled, so it's not a waste of time.

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4 years ago, # |
  Vote: I like it +8 Vote: I do not like it

I liked the problems a lot, but unlike the others I am thankful that you've unrated the contest. There was easily almost half an hour-45 min where even all the three lightweight websites weren't loading. (My internet was and is pretty fast).

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4 years ago, # |
  Vote: I like it +8 Vote: I do not like it

Is it just me who cannot access anyone's profile. It shows "The page is temporarily blocked by administrator."

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4 years ago, # |
  Vote: I like it +5 Vote: I do not like it

Such a great round got destroyed. Anyways cool problemset, hoping for smooth conduction of tomorrow's round. Thanks Codeforces!

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4 years ago, # |
← Rev. 2   Vote: I like it +1 Vote: I do not like it

Good job to the authors, do not downvote the blog!!! The contest was a little bit Speedforces, but on whole, it was a nice contest. Especially I liked the 2 subtasks, which made the round more balanced. Good job, good job.

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4 years ago, # |
  Vote: I like it -27 Vote: I do not like it

asas
OK?

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    4 years ago, # ^ |
      Vote: I like it +9 Vote: I do not like it

    Don't worry, we have one more round tomorrow, give your best!

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4 years ago, # |
  Vote: I like it +21 Vote: I do not like it

tfw E1 < B lol

problems were really good overall tho, D was magical because it seemed completely impossible (didn't even know how to solve it without the tag constraint) until I saw the

Spoiler
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    4 years ago, # ^ |
      Vote: I like it 0 Vote: I do not like it

    I don't know how to solve D but based on constraints i thought it would be a dp or graphs with O(N^2).

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4 years ago, # |
  Vote: I like it 0 Vote: I do not like it

I don't like unrated because of my good performance.

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4 years ago, # |
  Vote: I like it +11 Vote: I do not like it

What hurts more than break up....**CONTEST UNRATED** :(

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4 years ago, # |
  Vote: I like it +20 Vote: I do not like it

Really disappointed. Went for dinner, when come back found its gone unrated! But they already said we can use m1.codeforces.com if technical issue occurs.** It shouldn't go unrated.**

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4 years ago, # |
  Vote: I like it 0 Vote: I do not like it

what are "constructive" problems ? How to get better at these?

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4 years ago, # |
  Vote: I like it +10 Vote: I do not like it

My very first contest got unrated :(

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4 years ago, # |
  Vote: I like it +8 Vote: I do not like it

I would have hit Master today, but alas, the round got unrated. Still, thanks for the interesting problems.

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4 years ago, # |
  Vote: I like it 0 Vote: I do not like it

Please give us one more contest in the span of 22nd to 28th March ;-;

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4 years ago, # |
  Vote: I like it 0 Vote: I do not like it

If this round becomes unrated. What is the point of having m1,m2 and m3 server.

I don't think any good reason for unrated.

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    4 years ago, # ^ |
      Vote: I like it -11 Vote: I do not like it

    Many people (including me) didn't knew about m1,m2,m3.

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      4 years ago, # ^ |
        Vote: I like it +3 Vote: I do not like it

      It is your problem. You are a member of cf community for 13 months, messages about m1 m2 and m3 pops up often. During this round there was no period when all of those sites were dead, so nothing was stopping the participants from submitting problems. The round by itself was really good, great thanks to authors and everyone who helped them.

      P.S Judging from submissions, many people knew about m1 m2 and m3.

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        4 years ago, # ^ |
          Vote: I like it -6 Vote: I do not like it

        Well I have been an active member of CF from July 2020 (account was created before , but I didn't participated much before ) , and since July I don't remember any moment when we were meant to use M1,m2,M3 , may be there have been pop ups , But I didn't remember them before yesterday , As there are many other things to remember in life than a thing which has very very low chances of happening.

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4 years ago, # |
  Vote: I like it -6 Vote: I do not like it

Are the rating changes for this round out ?

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4 years ago, # |
← Rev. 2   Vote: I like it 0 Vote: I do not like it

wrong post, sorry

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4 years ago, # |
  Vote: I like it 0 Vote: I do not like it

Very nice contest! good job.

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4 months ago, # |
  Vote: I like it 0 Vote: I do not like it

dont you think in c2 problem there can be multiple solutions

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