Hey guys, I want to know your thoughts about a few things:

• How important is taking notes while doing cp?

• What do you use to take notes?

check his profile: MidniteRayZ

So I've filtered all the hacked submissions in the round, and I've noticed something strange: https://codeforces.me/contest/1772/submission/185895220 https://codeforces.me/contest/1772/submission/185894048 https://codeforces.me/contest/1772/submission/185892176 https://codeforces.me/contest/1772/submission/185890581 https://codeforces.me/contest/1772/submission/185890587 https://codeforces.me/contest/1772/submission/185888246 https://codeforces.me/contest/1772/submission/185888258 https://codeforces.me/contest/1772/submission/185887838 https://codeforces.me/contest/1772/submission/185868906

All these submissions have something in similar: if t == 1 or t == 2, it will automatically exit, causing it to be hacked

I've stumbled upon a version of this problem with smaller constraints on another site: 177 — G2 and managed to solve it using a naive approach (I believe it'd get me 30% of the points in this version aswell).

But I really want to know the intended solution that works with such large constraints, any help is appreciated, thanks