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AtCoder Regular Contest 192 (Div. 2) Announcement
By atcoder_official, history, 5 weeks ago, In English

We will hold AtCoder Regular Contest 192 (Div. 2).

The point values will be 400-600-600-600-800.

We are looking forward to your participation!

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5 weeks ago, # |
  Vote: I like it 0 Vote: I do not like it

Good luck Everyone

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

when I try to register for the contest it shows register as unrated participants, there is no option for rated participants

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    4 weeks ago, # ^ |
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    Rated range: 1200 ~ 2399 you 1199

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      4 weeks ago, # ^ |
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      how can I increase my rating without participants, I am new to atcoder

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

    brother try to register before contest starts:)

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

Clutched C at last minute.Also,i love problem B.

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

Too much case work in A and B.

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    4 weeks ago, # ^ |
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    Too much case work in C.

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    4 weeks ago, # ^ |
    ← Rev. 3   Vote: I like it 0 Vote: I do not like it

    TBH I don't think there are too many cases to be handled in A. Here is my implementation for the same. Submission

    Although I didn't solve it in contest but I thought it was a good A.

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

For problem B, it seems like there isn't a test case where $$$n>2$$$, number of odd and even elements are equal and the total sum is odd. These 2 solutions (1, 2) both got AC, when they give different outputs on 1 1 1 2 2 2. (correct one is Fennec.)

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

B's test is weak,I passed while wrong on 7 1 1 1 1 2 2 2 . Answer is Snuke.

And also,too much casework on a,b and c , don't you think that a,b and c involves little algorthims?

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

    This is what a high-quality mind-storming contest should have.

    If there is only little casework, it's not ARC any more.

    Though I didn't successfully find out the answer of B, I'm still satisfied. It's a good problem.

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4 weeks ago, # |
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It seems that Problem C is very similar to JOI Open Contest 2018 Xylophone.

The difference of two problem is that Xylophone has further constraints $$$A_i = 1$$$, and the method of distinguishing two permutations; which the first one prevents some solutions from xylophone (but main idea persists throughout the problem), and the second one is irrelevant to the problem's idea.

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

Task A has useless samples. I got WA in the contest and have no way to find out why.

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4 weeks ago, # |
  Vote: I like it -13 Vote: I do not like it

i am chinese

我是中国人

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

Genshin Round

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