Couple of days ago I got to know that Radewoosh is on Atcoder with username 'stonefeang'. So I was wondering whether this username has been taken by someone on codeforces or not. But to my surprise when I type 'stonefeang' in the profile url or in search handle option it takes me to Radewoosh's profile.
How does it happen?
Read this blog here, where it is mentioned,
The links to a profile page with an old handle would automatically redirect to the actual profile.
Ohhh! I just read it thanks, Would this functionality of changing handle will be available this year too?
Well, I hope so! They usually let you change in between first 10 days of each new year, afaik.