I am a newbie here and having no experience in programming except for vb (visual basic).So please help me out that how to get started …
Welcome to codechef !!
These resources can help you in starting with codechef .
http://www.codechef.com/getting-started
http://discuss.codechef.com/questions/37684/learn-competitive-programming
You can start practising with the easy questions in the practise section of the codechef .
There are 3 monthly contests , long contest that run for 10 days , short contest and a lunch time contests . Editorials are published after every contest so if you are not able to solve a particular question during contest , you can see the editorial .
Codechef also have a particular section for school students , lunch time contest is aimed at them . You can start solving question from the previous lunchtime contests here . you can start solving the question which is most solved . If you are unable to solve any question , you can look through the solution of other programmers .
Happy Coding !!!