adventofcode/2020/3/trajectory2.fish
2022-12-01 21:02:00 +01:00

37 lines
631 B
Fish
Executable File

#!/usr/bin/fish
set lines (cat input)
function traverse
set hv $argv[1]
set vv $argv[2]
set pos 0
set trees 0
set i -1
for val in $lines
set i (math $i + 1)
if test (math $i % $vv) -ne 0
continue
end
set width (string length $val)
set char (string sub -s (math $pos + 1) -l 1 $val)
set pos (math "($pos + $hv) % $width")
if test "$char" = "#"
set trees (math $trees + 1)
end
end
echo $trees
end
set a (traverse 1 1)
set b (traverse 3 1)
set c (traverse 5 1)
set d (traverse 7 1)
set e (traverse 1 2)
echo "Total number of things is ($a * $b * $c * $d * $e) " (math "$a * $b * $c * $d * $e")