E869120's blog

By E869120, 7 years ago, In English

Hello Codeforces!

I'm quite excited to invite you to AtCoder Beginner Contest 076 which will held on Saturday, October 28th 21:00 JST and lasts for 100 minutes.

The round problems are created by me (E869120) and square1001.

This contest will have four problems and it is rated for contestants whose rating is below 1200. The same as before, contestants whose rating is more than or equal to 1200 can take part out of competition.

The scoring is: 100 — 200 — 300 — 400.

I hope you can have fun during the contest. Good luck and have fun, wish you high rating!

See you tomorrow!


UPD 1: The editorial is here. Thank you for participating!

UPD 2: Congratulations for the winner!

Rank Username A B C D WA/TLE Total
1 mamekin 00'54" 02'21" 07'30" 16'04" 0 16'04"
2 uwi 00'58" 03'00" 10'05" 19'40" 0 19'40"
3 dreamoon_love_AA 01'29" 02'50" 07'28" 17'41" 1 22'41"
4 sugim48 00'37" 01'47" 05'11" 18'06" 1 23'06"
5 kobae964 00'59" 02'05" 06'38" 18'09" 1 23'09"
6 Warden 02'18" 04'49" 10'39" 23'31" 0 23'31"
7 TangentDay 00'37" 02'13" 06'13" 24'32" 0 24'32"
8 cyand1317 24'51" 24'51" 24'50" 24'50" 0 24'51"
9 femto16 01'26" 03'14" 08'45" 25'10" 0 25'10"
10 iehn 01'16" 02'25" 07'38" 27'26" 0 27'26"
  • Vote: I like it
  • +24
  • Vote: I do not like it

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

[Reminder] Contest will starts in 4 hours.

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

"A mystery of AtCoder's train speed"

Btw, why 2168?

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

    Yes. This is the random value in the range [2101, 2200], because I want year to be 22th Century, but I think what value is OK. (Let's realize AtCoder will have express train system: In this pattern AtCoder have billion of dollar, and competitive programming will be more major sports! Yeah!)

    By the way, you got 8-th place! Congratulations!

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      7 years ago, # ^ |
        Vote: I like it +18 Vote: I do not like it

      Thanks, sounds awesome!

      I had thought it was a subsequence taken from reversed "869120"... Seems I overcomplicated it :)

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        7 years ago, # ^ |
          Vote: I like it +24 Vote: I do not like it

        Actually, I made problem D!
        (square1001 made A and C, E869120 made B and D)

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          7 years ago, # ^ |
            Vote: I like it +24 Vote: I do not like it

          Great problems for an ABC, IMHO :)

          Together you've inspired people with the story of the diligent Takahashi-kun, who still gets -4500 performance now but will become president of a company of billions of dollars!

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

How to solve Problem C ? I have a problems in 13,14,15,16 tests .

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    7 years ago, # ^ |
    Rev. 2   Vote: I like it +7 Vote: I do not like it

    I understood my error . In test :

    ??a???a fs

    must be aaaafsa ,but my program gives UNRESTORABLE .

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7 years ago, # |
Rev. 2   Vote: I like it +5 Vote: I do not like it

[AtCoder Express] Does anyone see the problem with this solution: http://abc076.contest.atcoder.jp/submissions/1721768 ?

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

    Your solution returns 4.75. I think the answer is 4.5.

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