WC2021 Travel Notes-A konjac's journey to zero

My coordinates are ZJ, a Konjac.

Day --inf

I can only participate in CSP-J due to the explosion of the CSP-S preliminary contest. It seems like a bad sign?

Day -inf

Didn't expect J 320pts to enter the WC? Surprised and delighted.

But can I really get points?

Day 0

PS Here Day 0 is relative to 2021/2/5.

Template review before the exam. I haven't learned any template myself, and the total number of black and purple questions is less than 10, which is a real stroke.

Day 1

The online competition begins.

Look at T1, bracket sequence? The problem on the map.

T2, it feels similar to T3 of J group? It seems to build an expression tree? But it was quickly crossed by me.

T3, a math problem, slipped away.

It has been 30 minutes after reading the question.

T1 used 3 namespaces for 64pts. The worst thing was that my first search exploded. . . . . . It seems that the ring has not been handled properly?

T2 is relatively better, first hold 35pts, and then. . . . . . will not. The only thing that can be thought of is enumeration ?, but the complexity is $2^t$ , obviously will TLE, it is better to use these times to adjust the part of T1. (But in the end, I didn’t write a better part of the score)

T3 leaves directly at 20pts.

I remember that I did a Fibonacci number cycle problem last year, but I can’t remember my thoughts clearly. . . . Last mmThe solution for$m$ is a prime number has not been figured out. Or I am too weak and my math skills are not deep enough.

The final estimated score $[55,119]$。

However, the influencing factors of T1 are too great, and I can't guarantee that part of the T1 points can be filled (it is also possible to burst zero).

Other gossip

After the game, the hgs boss in the computer room told me that T2 has an $O\left(n^{2}m\right)$is pretty easy to write? But I didn't understand.

update

The result came out, 82, there is even Cu? Surprised me.

to sum up

In fact, as a Konjac who knows nothing, the most important thing to do is to hold some points, but T1 doesn't seem to be steady.

In short, this year is hopeless, come on next year!