Glitch Software Developer interview questions

Sent out an email with cover letter and resume, received automated response almost immediately telling that a human with review my resume and will get back to me in any case. The next day or so I received an email from an HR person to schedule online interview (they asked me to tell them my 3 preferable times to meet and we agreed on one of them). On scheduled time I met with a guy over the phone/screensharing, we talked for a few minutes about my experience, current job, etc., I asked few questions about FogCreek and we moved to programming part. There was a problem to solve on strings, nothing difficult, but since I was little nervous, I proposed not the most efficient solution (the efficient one came up to my mind right after I coded my initial solution and we discussed pros and cons or those two afterwards) and this was the reason I failed. Btw, they don't care which programming language you are using to solve the problem - there's a shared text board and you can write in any language you like - algorithms and data structures are the only things that matter. The next day I received a letter saying that currently they have nothing to propose to me and they wish me all the luck. The overall process was extremely pleasant and it was a great experience.