Okay, today I learnt 
Thank you. I do not use ngrok but it seems that all commercial tunnel software will suffer from the same problem.
@mattbaker here is my last attempt https://github.com/lud/protohackers/blob/main/lib/proto/p0/smoke_test.ex .
lud
1
mattbaker
Yeah I tried a couple tunnels before giving up an opening a port, same experience here.
Cool solution! I noticed by the 3rd challenge the “active” mode got in my way because I couldn’t reliably dictate how many bytes got read at a time so I felt back to explicitly calling “recv”, if you get it working I’ll be super curious, I’m still convinced I was just missing something 
0
jackharrhy
I’ve been doing them! My question 2 (means to an end) solution needs work, but otherwise been having a blast so far.
1
mattbaker
I’ll share my repo too!
https://github.com/mattbaker/protohackers
I liked the way you wrote about each problem so I copied your format and did the same, that was a nice touch
0
NobbZ
I finished my attempt to the smoke_test yesterday and tinkered a bit with the repo setup over the day.
1
lud
I just finished my deployment setup, and the smoke test passes.
Unfortunately I had to build with OTP 23 because the GLIBC version of my server (debian bullseye) seems old. But OTP 23 does not compile on my machine
So I had to build inside a docker container and copy the release back to the host. Now it works well and the smoke test passes.
0
jackharrhy
I’ve been cloning the repo to my server, and wrote a little script to book into an iex shell w/the application running ( protohackers/run-in-docker.sh at main · jackharrhy/protohackers · GitHub )
been working good so far!
1
lud
Exercise 6 is the opposite of fun really. I am always failing the large world test by between 1 and 10 tickets, over 800 tickets. I am not sure if it is an optimisation problem.
0
ahamez
Hey! If anyone’s interested, here’s my solutions for problems to to 8: GitHub - ahamez/protohackers: Elixir solutions for https://protohackers.com · GitHub.
It was a fun experience so far (except for problem 7, the specification lacks some details which nearly drove me nuts 
).
Also, I’ve been able to use Nx for problem 8 by encoding the cipher as a matrix, it was very fun to do!
2
APB9785
Creator of ECSx
What is everyone using to deploy their solution(s)? I’ve been using Fly.io with mixed success. Running apps on UDP and TCP · Fly Docs got me started, but I still haven’t got the smoke test passing.
[Tue Jan 24 20:47:53 2023 UTC] [multiclient.test] NOTE:passed connection 0
[Tue Jan 24 20:47:53 2023 UTC] [multiclient.test] NOTE:passed connection 1
[Tue Jan 24 20:47:53 2023 UTC] [multiclient.test] NOTE:passed connection 2
[Tue Jan 24 20:47:53 2023 UTC] [multiclient.test] FAIL:failed connection 3 (sent 1056 bytes, received 0 bytes)
From Fly.io server logs:
[error] could not proxy TCP data to/from instance:
failed to copy (
direction=server->client, error=Connection reset by peer
(os error 104)
)
0