No one tells you that they delete inactive accounts. I used to have over 300 solved problems htere. Now it is all gone, all the effort, but the skill remained of course.

A few years back (10 maybe?) they had a disk crash, and there was a notice that for people with 100 or more problems solved they'd do an extra effort to recover their solutions and add you back, not sure if it was only posted on the main website. I was lucky to get my account back at the time

I still have the code for the first 50 problems in GitHub. The last commit was thirteen years ago. I don’t know why I checked these in rather than treating them as throwaway code like I did for so many other things, but I’m glad I did as I’m sure my PE account is gone now too.

So, I gather that you treated your solutions as throw-away code, rather than keeping them? Kind of surprising, considering that some problems build off of each other, or otherwise benefit from sharing code; you never know when the code for one solution could be useful later. For example, a prime number generator/tester is necessary for many of the problems.

(I have all my solution code, in source control no less, so if I ever lost my account, I could just run them all and re-enter the solutions.)

I remember there were data loss, but my account appears to have been recovered. You may try to login again, and with luck, like me you will get back your history.

How long before they start deleting? I haven't logged in for 5 years and my account is still there.