I have a question about training for you guys. I hope you can help me.
Do you still train with introduction topics problems?
I mean, even after knowing some advence topics like dynamic programming, graphs, segment tree, number theory, geometry, fft. Do you still train doing implementation, two pointers, basic data structures, brute force, and greedy problems, or you only train with advance topics?

Thanks in advance

Hi everyone, I would like to know if there are math problems about
calculus or algebra, and if so where can I found them?

I hope someone can help me, thanks

Is there a better suffix array solution for this problem ?
This is my solution, but I think is very inefficient
Is there a better solution with suffix array?
there is no editorial for this round
I hope someone can help me!
Thanks!