How do I submit my code in CodeChef site i.e. in which format shud i upload the program?
You can choose from many programming languages. When you have working solution (at least you think it’s working), simply click submit button on problem statement page and then upload source file (.c, .cpp, .java, …) or copy your code to editor and submit it and finally wait for verdict.
Try the easiest TEST problem first. I recommend also FAQ.