Introducing Difficulty Levels!

Just like the problems in the Qualification Quiz were assigned difficulty levels (, or ), semilabs also come in three flavors. Please consider the following guidelines when selecting semilabs you would like to attend at SC2013: 

 - A one-knot semilab does not assume any prior knowledge on the topic.

 - Two-knot semilabs do not require any prior knowledge on the topic, but will generally be more challenging than .

 - The most challenging semilabs offered are marked with three knots. They have prerequisites - a set of concepts you are expected to be familiar with prior to attending the semilab.