TBH seeing a red coder ask for what options he/she has. I'm scared.

As a responsible contestant, I gave you contribution.

In my opinion you might be practising the wrong way. I myself at start code for 1 year and could not solve Leetcode medium problem. After that I focused my practice on particular difficulty level and tried to solve problems on all DS at that difficulty level (like medium array, medium graph etc).

The problem earlier was that I solved problems of only easy level for one year and touched only a few DS.

The unbelievable fact here is that there are people who create fake accounts just to make non-sense posts.

When in my first contest on codeforces (div3 round) I got +500, I thought I will become red after few more contests.

Thank you all the people who have put in time and efforts in making this contest for us. Upvoted!

From problems to editorial, I can see that you have put in a lot of efforts to make us learn things. Thank you so much for this round!

The only part I was not able to understand is, gcd(a,b,c) = gcd(a,gcd(b,c)) => gcd(a,gcd(b,c-b)) = gcd(a,b,c-b). How are we taking gcd(b,c-b) just as b,c-b. That way we could just write gcd(a,b) = a,b as well.