I got a CodinGame email: “Someone replied to your comment!”
When I clicked the link from gmail in chrome, it resolved to something like
Notice the encoded
rubik%AE in the URL (which is extended ASCII encoding?). The page never loaded…
I’m pretty sure the correct URL starts with
(which seems like UTF-8 encoded
The notification from the CodinGame notification box seems to work (except the linked solution doesn’t come up, so maybe it was deleted or taken down).