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NP-hard problem
A mathematical problem for which, even in theory, no shortcut or smart algorithm is possible that would lead to a simple or rapid solution. Instead, the only way to find an optimal solution is a computationally-intensive, exhaustive analysis in which all possible outcomes are tested. Examples of NP-hard problems include the traveling salesman problem and the popular game Tetris.
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• COMPUTERS, ARTIFICIAL INTELLIGENCE, AND CYBERNETICS
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