Imakf's blog

By Imakf, history, 2 months ago,

The jury solutions will be updated later.

The jury solution is updated now.

1496A - Split it!

Idea: waaitg

Solution (Imakf)

1496B - Max and Mex

Idea: waaitg

Solution (waaitg)

1495A - Diamond Miner

Idea: smg23333

Solution (smg23333)

1495B - Let's Go Hiking

Idea: waaitg

Solution (waaitg)

1495C - Garden of the Sun

Idea: Imakf

Solution (Imakf)

1495D - BFS Trees

Idea: waaitg, Daniel_yuan, isaf27

Solution (Daniel_yuan)

1495E - Qingshan and Daniel

Idea: Imakf

Solution (Imakf)

1495F - Squares

Idea: waaitg

Solution (waaitg)

• +160

By Imakf, history, 2 months ago,

Hello, Codeforces!

Daniel_yuan, waaitg, smg23333 and I are glad to invite you to Codeforces Round #706 (Div. 1) and Codeforces Round #706 (Div. 2), which will take place on Mar/10/2021 15:05 (Moscow time). Note the unusual time of the round. In both divisions, you will be given 6 problems and 2 hours to solve them all.

We would like to thank:

Score distribution will be announced before the round.

Hope you all gain positive ratings $\Delta$ in this round!

UPD1: Score distribution is

Div. 2: $500-1000-1500-2000-2500-3000$

Div. 1: $500-1000-1500-2000-2500-3250$

UPD2: Editorial

UPD3: Congratulations to the winners:

Div 1:

Div 2:

• +580

By Imakf, history, 3 months ago,

My friends and I proposed a contest 4 months ago and received replies recently. It should be a happy thing. Unfortunately, today, one of my friends doesn't know English very well and he really pushes the "MAKE IT PRIVATE" button. Then the proposal is cancelled TAT. Of course we don't want to wait for another 4 months. But all of us don't know how to handle this situation. We felt really sorry for making such a stupid mistake.

We have reproposed the contest. It would be good if the coordinator could help us. Thanks, and sorry again.

• +187

By Imakf, history, 7 months ago,

Just now my friend(parallelist) found a wrong solution(83183287) of an old problem. He tried to hack it but couldn't find the hack button. I guess that it's because he seldom participates in contests so he ask me to do it and gave me his hack tests. But there is NO hack button either on my screen. "Maybe I should solve this problem first?" I think. Then I do a copy paste to get AC. Well, there's still no hack button.

I am sorry for my friend, wondering if it is true that on Codeforces, you can not make a hack on an old problem? Thanks in advance.

• +11

By Imakf, history, 18 months ago,

Hello codeforces!

CSP-J/S(Certified Software Professional-Junior/Senior) of China ended. CSP-J/S (or you can say NOIp ,but it has been dead) was held by OI rules. In OI rules, every problem has the same score distribution $100$ points. In one problem, there is several testdatas (like $10$ ,$20$ or $25$). Every testdata has the same score distributions. Once you pass a testdata, you can get the score. You can submit your code during the contest, but can't see the result. The organizer will judge all the programs together after contest.

I'd like to share the problems of CSP-S here! Hope you guys enjoy. Don't mind my poor English, I spent a whole afternoon translating.

D1T1 code
D1T2 brackets
D1T3 tree
D2T1 meal
D2T2 partition
D2T3 centroid