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Was ich beim Advent Of Code 2018 gelernt habe
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TIL: Summed Area Table
-3 1
3
5
7 -7 1
6
3
4 3 + 6 + 5 - 3 = 11 -5 3 3 4 -4 4 3 3 4 -3 3 3 3 -5 -1