Just finished my first contest after almost a year of no codeforces contests. Overall, I felt like it went pretty alright, although I only managed to solve the first three problems. On problem 4 (Divisible pairs), I got completely stuck for a long time, before finding a solution on the very last minute of the contest, which turned out to be too slow. I find that this scenario happens fairly often: usually I solve two or three problems, which don't take too much time, but then some other problem will stump me and all solutions I come up with either don't work because of some test cases that I didn't think of or it's just too slow. Looking forward to looking at the solution for it though — I had a suspicion it might involve two pointers from the moment I saw the problem, but I couldn't find any way to implement it.

There's only one conclusion that can be drawn from this — I need to practice more.

Well then, 'til the next contest!