Hey guys,

Its all well and good that we talk about the IOI but the selection phase starts from the ZIO or the ZCO. So I just had some doubts regarding ZIO. Please answer them-

1. For someone who is a beginner in programming and algorithmic thinking, how long do you think is needed to get a basic grasp on concepts ( at least enough to qualify ZIO)?
2. Which books do you recommend for a complete beginner in algorithms?( I have heard about the CLRS book but I want some first hand recommendations and ratings please).
3. Which, do you think, is better- ZIO or ZCO?
4. What is the rough syllabus of Zonal Informatics Olympiad? Any specific concepts which are important?

Thanks