Can Someone Guide how to improve coding proficiency and gain ability to solve hard or challenging problems in codechef.
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I think this link will help you…!!
This might help you, I wrote this a couple of months ago. 
https://discuss.codechef.com/questions/104710/an-advice-for-competitive-programming
You can get very good answer on it just Google it once,thanks.
I hope it will help you. if you will go on codechef discuss and see most voted question then you can get your answer.
https://discuss.codechef.com/questions/37684/learn-competitive-programming
before jumping into programming try to find the algorithm using pen and paper. try to learn mathematics if you are looking forward to solve hard problems