Can we Become a Problem setter even if we have less than 4 stars?
dont know bro
Maybe if you organize your own contest you may. But for official codechef rounds sadly NO.
Yes, you can become a problem setter. If your idea is really good, nothing will matter. Just submit your idea and wait for the Admin’s reply.
More about becoming a problem setter
It will take at least a few months (from the time your idea is accepted) to include your problem in a Contest