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I actually saw an explanation under another comment explaining this. It has something to do with; when to reduce 3/4 to zero it can be cheaper to do it via -5 (-1|-2) and reducing the and then others by 2|1.
Equal
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I actually saw an explanation under another comment explaining this. It has something to do with; when to reduce 3/4 to zero it can be cheaper to do it via -5 (-1|-2) and reducing the and then others by 2|1.
Reducing 6 9 9 Option 1 (4 moves) -2@1 6 7 9 -2@2 6 7 7
-1@1 6 6 7 -1@2 6 6 6
Option 2 (3 moves) 6 9 9 -5@1 6 4 9 -5@2 6 4 4 -2@0 4 4 4
Reducing by 5 first is faster :).