Programming is fun, programming is an exercise of your brain, programming is a mental sport and when this is held over internet involving sport programmer as a contestant it is called Competitive Programming. A programming competition generally involves the host presenting a set of logical or mathematical problems to the contestants, and contestants are required to write computer programs capable of solving each problem. Judging is based mostly upon number of problems solved and time spent for writing successful solutions, but may also include other factors (quality of output produced, execution time, program size).