I have been doing CP for more than 1 year. I have observed there are so many people who reach Expert, Candidate Master without putting much efforts in very less time.
People like me have to solve like 100 problems of a certain difficulty to become comfortable for that difficulty whereas they don't practice many questions and they are still able to solve them.
Chinese Coders, Many IITians are the people with whom I observed this phenomenon the most.
