My (attempted) solutions to the 2022 Advent of Code
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```commit 09fc897885233cca0455911979cb1e31ef19731f
parent 3afc67b9cb99a79240f14d4247eed371dbf47025
Date:   Thu, 15 Dec 2022 20:53:23 -0800

Solution to day 12, part 2.

Diffstat:
Msrc/day_12.jl | 10+++++++++-
```
```1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/src/day_12.jl b/src/day_12.jl
@@ -68,6 +68,11 @@ function pathdist(g::AbstractGraph, v_source::CartesianIndex{2},
pathdist(g, source_ind, dest_ind)
end

+function pathdist(g::AbstractGraph, v_source::Vector{CartesianIndex{2}},
+                  v_dest::CartesianIndex{2}, heightmap::AbstractMatrix)
+    map(x->pathdist(g, x, v_dest, heightmap), v_source)
+end
+
function part_1(input)
heightmap, v_source, v_dest = parse_input(input)
pathdist(makegraph(heightmap), v_source, v_dest, heightmap)
@@ -76,6 +81,9 @@ end
@info part_1(input)

function part_2(input)
-    nothing
+    heightmap, _, v_dest = parse_input(input)
+    v_source = findall(heightmap .== 0)
+    minimum(pathdist(makegraph(heightmap), v_source, v_dest, heightmap))
end
+@assert part_2(example) == 29
@info part_2(input)
```