If you click on the 'submissions' tab, you would see something interesting. You may notice that more than half of the submissions were made by unrated ones with random names.

Also we all know that the judge machine has down for many times today.

Thanks.

I reviewed all the contests I got negative delta in this year. Then, I found something interesting!

Teza Round 1 (Codeforces Round 1015, Div. 1 + Div. 2) I spent 2 hours in 2084E - Blossom(Given an incomplete permutation and count the possible valid permutations) so that I didn't have enough time to solve G1. Rating -= 59.

Codeforces Round 1021 (Div. 1) No counting problems but I spent more than 1 hour in a stupid ExGCD problem. Rating -= 38.

Codeforces Round 1024 (Div. 1) I didn't solve 2101D - Mani and Segments(Given a permutation and count the valid subarrays, which is only *2500) within 1.5 hours. Rating -= 28.

EPIC Institute of Technology Round Summer 2025 (Codeforces Round 1036, Div. 1 + Div. 2) I didn't solve 2124F2 - Appending Permutations (Hard Version)(Given some restrictions, count the valid permutations) as I quickly solved the easy version with 1.5 hours left. Rating -= 2.

Codeforces Round 1040 (Div. 1) I didn't solve 2129D - Permutation Blackhole(Given some restrictions, count the valid permutations), which is obviously a range DP. Rating -= 96.

Atto Round 1 (Codeforces Round 1041, Div. 1 + Div. 2) I didn't solve 2127F - Hamed and AghaBalaSar(Calculate F(a) for all valid array a modulo 1e9+7). I even couldn't come up with any possible observations except transforming the function F and try to enumerate a[n] and how many times it appears(obviously O(nlnn)). Rating -= 43.

I have a conclusion now.

If one contest have a problem like counting valid permutations or given few numbers and calculate something % 1e9+7 / 998244353 in the place of 1D, I can easily get a negative delta while everyone other than me can solve it with ease.

What should I do???

I just simply didn't know how to solve G2 and I went to watch short videos.

But when I check the scoreboard again WHAT THE FUCK?????????

Oh, that's so amazing bro

When I register on the recent division 1+2 contest, I find the registered list is so weird. There are lots of unrated users, which registered in codeforces several minutes ago, and they're all named with some letters with a number.MikeMirzayanov, stop letting those ones ruining codeforces!

Hi. I found it hard for me to solve, or even come up with an useful observation, when I'm doing a hard task. For example, yesterday in the CF round, I solved task A~E1 quickly, but I cannot solve task E2/F, though I think about task E2 for more than 1 hour. I can't even have a direction of that task. Now I can solve problems with difficulty below 2500 easily, but for the problems which are slightly harder, I have no idea to solve them. How do you think about/solve a problem with difficulty more than *2700? Also, can you tell me what did you do, and how did you train, from cannot come up with an observation to a task of *2700+, to you can solve these tasks in the competition. For the ones who have solved many red problems, I really want to know how your mind works !!!

Emma maybe it'll be better to write this after the rating actually changes. But I'm too excited! I started programming in late 2017, but for a very long time, I never imagined that I can become GM. Thanks for my icpc teammates, they give me the courage to practice really hard for a long time, so that I can greatly improve myself. I've get one gold medal in ICPC regional contest, and I want to do better in the following year. Also, I want to be an IGM in 2025. Hope me to achieve the goal.