Participant: blackshark

Representing China using C++.

Qualification Round: ranked 1538 (50 points)
Saving the UniverseTrain TimetableFly Swatter
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Round 1B: ranked 349 (30 points)
Crop TrianglesNumber SetsMousetrap
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Round 2: ranked 1478 (10 points)
Cheating a Boolean TreeTriangle AreasStar WarsPermRLE
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