I don't really know how often that happens, but that's my first time ever hacking successfully on a contest.

2074D - Counting Points had weak tests (sorry, frontman), which let me hack people who weren't counting accurately or not using long long. I ended up hacking 36 times, after which it wouldn't let me XD. Sorry to all those whom I hacked.

Tests that I used:

3 2 100000 -1000000000 1000000000 50000 50000 1 50000 -1000000000 50000 2 50000 -1000000000 1000000000 25000 25000

2 2 100000 -1000000000 1000000000 50000 50000 1 100000 -1000000000 100000

1 2 200000 0 100000 100000 100000

Anyways, thanks chromate00 for a great contest!