physics0523's blog

By physics0523, history, 16 months ago, In English
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Jury solution: 85699387

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Jury solution: 85699884
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Jury solution: 85699939

UPD: $$$m<\min(a,b)$$$ is wrong, the right text is $$$m\le \min(a,b)$$$

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Jury solution: 85700178
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Jury solution: 85700334
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Jury solution (Solution 1): 85700515

Jury solution (Solution 2): 85700518

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Jury solution: 85700669

Feel free to share your approach here!

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By physics0523, history, 16 months ago, In English

Codeforcesの皆さん、こんにちは!(Hello, Codeforces!)

I'm glad to invite you to my first contest, Codeforces Round #654 (Div. 2) which will be held on Jul/01/2020 16:35 (Moscow time) (notice earlier time than usual). All of the problems were mainly written and prepared by me. The round is rated if your rating is strictly less than 2100.

You will be given 6 problems (one problem has a subtask) and 2 hours to solve them. Please, read all the problems.

I would really like to thank:

The scoring distribution will be announced later.

Good luck, have fun and wish your high ratings :)

UPD: Scoring distribution : $$$500 - 1000 - 1250 - 1500 - (1500 + 1250) - 3000$$$

UPD: Editorial is out

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By physics0523, history, 4 years ago, In English

Hello,Codeforces!

Tell trueth,I've already joined 4 other contests in here.

Today,I joined in #440(Div.2). Codeforces Round #440 (Div. 2, based on Technocup 2018 Elimination Round 2)

A:First,judge 1~9,After that,judge 10~99.

B:If k==1,output the minimum number.
If k==2,output the maximum of a[0],a[n-1],and the 2nd lowest number.
If k>=3,output the maximum number.

C:The best idea is 4+4+4+...+4+k.
If k==0,the output is q[i]/4.
If k==1, last +4+4+1 change to +9.
So,the output is (q[i]/4)-1.
If k==2, last +4+2 change to +6.
So,the output is q[i]/4.
If k==3, last +4+4+4+3 change to +9+6.
So,the output is (q[i]/4)-1.
In every query, you can response the answer in O(1).

Accepted:ooo--
Rating change:1441->1527(+86,highest)

Atcoder:Blue(1626,max1729)
Twitter:@butsurizuki

Nice to meet you!

Ja: こどふぉ始めてみました!(とはいえこれ含めもう5回コンテスト出てるんですが)
ブログのシステムがよく分かっておらず、とりあえず一本書いてみました(解法…ですかねぇ…)
これから日本人にとって人権的な時間のコンテストなら積極的に出ようと思います!
精進を重ねてひとまず青になりたい…
暫くはDiv.2で戦いますが、将来的にはDiv.1でも戦えるような地力を付けたいです(^q^)

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