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'''Internet Problem Solving Contest''' is an online programming competition for teams of up to three people, conducted annually each May since 1999.
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The competition consists of a set of [[algorithm|algorithmic]] problems which must be solved in a fixed amount of time. For each problem two input data sets (''easy'' and ''hard'') are published, and competitors are asked to compute the correct output data for given data sets. Usually, this involves writing a computer program in some [[programming language]], but producing the output by hand or in any other way is also acceptable.
Teams are ranked by the number of points received. Each team received 1 point for solving each easy data set, and 2 points for each hard data sets. Ties are broken by total time taken to solve the problems.