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Last active December 2, 2021 09:27
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Advent of Code 2021, ngn/k
Raw
aoc21.k
/ day 1
d:`I$0:"../d/1"
+/>':d
+/(-3_d)<3_d / no need to sum the 3-window
/ day 2
d:" "\'d:0:"../d/2"
mag:`I$d[;1];dir:d[;0]
m:(("forward";"down";"up")~/:\:dir)*\:mag
s:+/'m;s[0]*s[1]-s[2]
(+/(-/+\'1_m)*m@0)*+/m@0
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