%%% EX 11 - AlphaBeta Pruning
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-20pt: wrong pruning operation under the last left-branch min node and last right branch.

%%% EX 12 - CSP
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-25pt: wrong solution.

%%% EX 13 - A*
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-10pt: error at step 2.

%%% EX 14 - Planning
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-30pt: wrong competing needs mutex.

%%% EX 15 - LRTA
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-50pt: agent knowledge is not reported.