Speaking of yesterday's semifinal round (Results) - all went well. I didn't make mistakes, I had time to stresstest both the second and third problem solutions, and I was lucky to find a reasonably easy-to-write approach for the third problem (I've used Arena compiling and testing a lot to run dummy programs that will help me see which approaches will run for reasonable time - it's probably the first time I do that at an onsite round).
And here's a couple more lousy videos. First one shows the announcement of semifinal's results (you should press the "HD" button if you want to see the handles):
And this one shows the breakfast room today - just to give you a picture of a TCO place other than the Arena. Notice how people are grouped by language (Spanish, English, Chinese, Russian):