Hi!
Since the editorial will be posted later, I decided to write some quick solutions for the problems I managed to solve, as well as video editorials for C and F.
A - Little Artem
B - Kind Anton
C - Eugene and an array
D - Challenges in school №41
F - Kate and imperfection
Nice solution for F. Thanks.
Can someone help? this is my solution to B.75967933 I don't understand where I made mistake. I have tried to solve it in less than O(n).