We will hold AtCoder Regular Contest 192 (Div. 2).
- Contest URL: https://atcoder.jp/contests/arc192
- Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20250209T2100&p1=248
- Duration: 120 minutes
- Number of Tasks: 5
- Writer: hirayuu_cf
- Tester: Nyaan, maspy
- Rated range: 1200 ~ 2399
The point values will be 400-600-600-600-800.
We are looking forward to your participation!
when I try to register for the contest it shows register as unrated participants, there is no option for rated participants
brother try to register before contest starts:)
Clutched C at last minute.Also,i love problem B.
Too much case work in A and B.
Too much case work in C.
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.
For problem B, it seems like there isn't a test case where $$$n \gt 2$$$, 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.)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?
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.
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.
Task A has useless samples. I got WA in the contest and have no way to find out why.