advent_of_code_2022

commit 183e8d1cf7dd876123f6fce26b231da0eef3f827
parent 9bb419b8c48ecd581ce0c3a431046cdcd325ae79
Author: Eamon Caddigan <eamon.caddigan@gmail.com>
Date:   Sat, 14 Jan 2023 19:47:44 -0800

Solution to day 20, part 2.

Diffstat:
M
src/day_20.jl
 | 
23
+++++++++++++++++------

1 file changed, 17 insertions(+), 6 deletions(-)
diff --git a/src/day_20.jl b/src/day_20.jl
@@ -54,6 +54,13 @@ function moveelement!(coordfile::CoordFile, index::Int)
     coordfile
 end
 
+function mixelements!(coordfile::CoordFile)
+    for i = 1:length(coordfile)
+        moveelement!(coordfile, i)
+    end
+    coordfile
+end
+
 function coordinates(coordfile::CoordFile)
     # Find the zero
     zeroloc = coordfile.indices[findfirst(x->x==0, coordfile.values)]
@@ -63,16 +70,20 @@ function coordinates(coordfile::CoordFile)
 end
 
 function part_1(input)
-    coordfile = CoordFile(input)
-    for i = 1:length(coordfile)
-        moveelement!(coordfile, i)
-    end
-    coordinates(coordfile)
+    input |> CoordFile |> mixelements! |> coordinates
 end
 @assert part_1(example) == 3
 @info part_1(input)
 
 function part_2(input)
-    nothing
+    coordfile = CoordFile(input)
+    for i = 1:length(coordfile)
+        coordfile.values[i] *= 811589153
+    end
+    for i = 1:10
+        mixelements!(coordfile)
+    end
+    coordinates(coordfile)
 end
+@assert part_2(example) == 1623178306
 @info part_2(input)